Field measurements on the CWD-2000 between 85-03-28 and 85-08-10

Field measurements on the CWD-2000 between 85-03-28 and

85-08-10

Citation for published version (APA):

Oldenkamp, H., & Pieterse, N. W. M. (1985). Field measurements on the CWD-2000 between 03-28 and

85-08-10. (TU Eindhoven. Vakgr. Transportfysica : rapport; Vol. R-765-D). Technische Hogeschool Eindhoven.

Document status and date:

Published: 01/01/1985

Document Version:

Publisher’s PDF, also known as Version of Record (includes final page, issue and volume numbers)

Please check the document version of this publication:

• A submitted manuscript is the version of the article upon submission and before peer-review. There can be

important differences between the submitted version and the official published version of record. People

interested in the research are advised to contact the author for the final version of the publication, or visit the

DOI to the publisher's website.

• The final author version and the galley proof are versions of the publication after peer review.

• The final published version features the final layout of the paper including the volume, issue and page

numbers.

Link to publication

General rights

Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners

and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.

• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.

• You may not further distribute the material or use it for any profit-making activity or commercial gain

• You may freely distribute the URL identifying the publication in the public portal.

If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the “Taverne” license above, please

follow below link for the End User Agreement:

www.tue.nl/taverne

Take down policy

If you believe that this document breaches copyright please contact us at:

openaccess@tue.nl

providing details and we will investigate your claim.

Field measurements on the CWO-ZOOO

between 85-03-28 and 85-08-10

Henk Oldenkamp*

Niko Pieterse*

R-765-D

November 1985

CONSULTANCY SERVICES

I

P.O. BOX 85

WIND ENERGY

3800 AB AMERSFOORT

DEVELOPING COUNTRIES

THE NETHERLANDS

*Wind Energy Group

Department of Physics

Eindhoven University of Technology

,..---'-B I ,..---'-BL.

TECHN I SCHE

UN I

lii'lllli"ilill

*9305827*

EINDHOVEN

-1-PREFACE

This report deals with field measurements performed at the

CWO 2000 wind pump in operation

at the Eindhoven testfield,

between 85-03-28 and 85-08-10.

Earlier measurements were reported by Henk Oldenkamp in reports

R 696 D and R 709 D.

The measurements in this report concern experiments to improve

the low overall performance. In order to have a fashionable

presentation, the report is divided in three parts:

part I:

RESULTS OF MEASUREMENTS

- changes in measuring conditions compared to earlier

measurements

- survey of the measurements

- results of the measurements

part II:

MEASURING BACKGROUND

- description of the testfield

- description of the measurements

- test circumstances of the CWO 2000

part III: MEASURING DETAILS

plot data - and binsort presentation of those

measurements used in part I.

PART I

-2-RESULTS OF MEASUREMENTS

Changes in measuring conditions

I.

It was decided to use the anemometer 1n the rotor plane for

the performance calculations.

Measurements with wind directions 1n line with the row of

windmills, were excluded (exclusion angles 60 deg. wide at

both sides).

.kc.

~~

d.-,

fa.~

;<

S-.

2.

Experiments have been undertaken with an electronically

regulated piston valve: the valve is kept Open by an

electromagnet at starting}the electromagnet 1S switched

off when a given rotor speed is attained.

This "closure speed" could be set electronically.

The aim was to investigate if such a starting device would

be better than a starting hole; it was of course not meant

as a practical solution in the field.

3.

The measurements started (on March 28) with a PVC pump cylinder;

this was replaced on April

17

by a

stainles's 'steel cylinder

4.

Apart from measurements with the electronically regulated

valve, for comparison also measurements with a starting hole

were done. The starting hole diameter was 2.8 rom, contrary to

the 2 rom of earlier measurements.

Survey of the measurements

The table presents a survey of the measurements done.

Results of the measurements

I.

The data on disk 20 contain measurements which were taken

with the PVC-pump cylinder and the electronically regulated

valve. In Figures la and Ib the C

.n

versus V and

A

versus

p

V-curves are presented. Four situations:

a.

the valve closes at rotor speed N

_c

₌

1

rls

b.

"

"

"

"

II

"

N

_c

=

0.5 rls

c.

_"

_"

_"

"

_"

"

N

_c

=

0

rls

(corresponding to no starting help)

d.

starting hole 2.8 rom.

Disk

start

blocks

total

selected

D (m)

s(m)

H(m)

start. device

remarks

N

N

P

20

85-03-28

1- 8

₅₄₄

₅₀₈

_0.068

O. I

8.5

electro regulated

N

I

rls

PVC-cylinder

20

9-12

_"

_"

N

C

0.75

rls

with new

20

13-17 -

360

153

I

(

II II

N

C

=

0.5

rls

piston cup

t-'l

20

18-21

"

II

N

C

0.25

rls

pressed into

1;;

20

22-27

422

422

_"

"

N

C

=

orIs

67

0.

t""'t:rJ

0,'068

c

20

28-31

288

230

O. I

8.5

starting hole 2 rom

21

85-04-17

1- 8

J

838

597

0.067

O.

I

8.5

electro regulated

N

=

0.5

rls

stair~ess

steel

t:rJt-'l

21

12-13

141

102

J

"

"

N

C

orIs

cy 1nder

.

1-"' CD

1

=

baUl!:: l:Up ab _{::l ::l}

21

14-17

"

"

N

C

=

0.5

rls

during disk 20

::TS

A- I

21

18-22

II

"

N

C

0.375

rls

o

1-"'

=

<:

::l

21

23-27

"

"

N

C

0.4375

CD s:::

=

;:i rt

21

28-31--

0.OS7

O. 1

8.5

"

"

N

C

=

0.45

CD

C

_~

22

85.05.03

1- 6

432

285

0.067

O. 1

8.5

electro regulated

N

=

0.4

rls

Try-out to

III(/l

22

7-12

408

280

II

"

N

C

0.42

find optimum

s:::

I

I

=

Ii Ul

22

13-20

555

441

II

"

N

C

=

0.44

closing speed

CD

S

I

22

21-25

323

150

\

_I

_"

_"

N

C

=

0.46

of electro

::lCD

21

26-31

432

366

f).C67

O.

I

8.5

"

"

N

C

=

0.48

valve

rt

en

C

C

23

85-05-18

1-1

o~ ,"-~

968

763

6.067

O. 1

8.5

electro valve

N

0.45

rls

sensor delta

§

23

_{11- 18}

1

₁₃₆₈

₉₀₆

0.057

O. 1

8.5

"

"

N

OrIs

not OK during

N

23

20-31.

0.067

O. 1

8.5

_"

_"

N

₌

Oris

B 11-12-18

0 0

block 27

0

disregarded

0 ::l Cl

24

85-06-07

1-20

1404

1258

0.067

O. I

8.5

starting hole 2.8 rom

§

24

:J-:

0,0

1

7

_"

II I

0.075

8.5

2.8 rom

rt

,

1512

1209

CD (/l rt HI 1-"'

25

85-06-25

1-10

0',067

0.075

8.5

starting hole 2.8 rom

From block 11

CDt-'

o1Vwards the

A-watermeter

::l~.

could not be

trusted anymore

26

85-07-12

1-31

0.067

0.075

8.5

starting hole 2.8 rom

disregarded

. y

-11...:::

I

"(.~

t{:;1),S"'1,fi"

fl.;

..

0

l,Js

•

o

II It

'r,'

If

•

.rt~

I!..,&.a.._'

(J

•

o

• ... a

•

•

"

II ;I

_a

+

i'

4

II) ~

oJ

t

•

D

b

7-

8

.-7

V(--/s)

-- _L.t...

l.--i--.! [

-~._._L-~ j._-~

!

i

IS~. ~ 'rk.~!Nc.~l/1J/$:

.;

\_~_+_.L.; ;..t-..,.-l--+-,-H--~.--~-

..

+.:.-!

i ' l

.+-

~

i",

II i

Ii

i

lie,

;,o,S'4.-~

i

~-+'-+'7-'-

.-.. _.:

"'T",~,,:·+---+-:::-t'T

:.i

._.~

I

I

~

h : ' , . :

,,:i

I~

:

J{,.o

<vAs

!

._"-+-~ ~~r'-'" ,-~:--~._-;

~;.-.-.---L~-.,,:-~-.

-t,_·

~--+-.~:

..-

~--t

). ' i

•

~(L~l_:--t~_~.-.;

iii

!

;.

•

•

+

.'

II

""

+

+

+

+

T

+

+

_o' ~

r:'

•

+

(I

•

0 !

i

i I .~- ,_.~-_,~_~~_~,+-J__~.__ ...__

.

I

•

,

...

--L-·-l~'--~"·_-4·j

%.0

1.0

1

t

•

(I

•

1

Q

3

I I ,

6

"f

8

~

V(...

/s)

-s--The choice of the closing speed

~s

rather critical:

N

=

0.5

rls

gives good results (better than a starting

c

hole) while N

_c

=

1

rls

is even worse than no starting help.

The A - V curve shows best the difference between starting

hole and electronically regulated valve: in the latter case

the mill can be running at Ad almost immediately after starting.

2.

From disk 21 on, an RVS pump-cylinder was used. In Figures 2a

and 2b a comparison is made between PVC and RVS.

- disk 20:

PVC-cylinder

- disk 21:

RVS-cylinder (new)

- disk 23:

RVS-cylinder (6 weeks old).

0

-•

•

p

..

~ 0 0

•

•

0

~

1...~

t1

:1.:4k

l.l

(P-IS

~(',).W)

0

:1AJk

~

(PVC)

D.JO

•

o

1

•

J

b

r

(j

_-~

v{.-Is)

(,,''"1

_D

_.2.0

~/sJ

.,..

·tir=

;l.

t.

1

N

_c:: 0

/~vs-~)

tI

Gi..

_J1.<

~I

_I

,

_ct.J"-

_.23

(It

1/.r-

("'-til

In )

0

etsu

:w

(PVC)

•

0

t

~

D./o

g

"

•

"

•

_•

c o

_"

•

o II

"

'f

3

•

l ~_--=·:"""-

""-

--+ +-I > r

-b

-b-From fig. 2a (N

=

0.5

rls)

the PVC-cylinder looks slightly

c

better, but the performance is as we have seen, very sensitive

to the closing speed, so no hard conclusions can be drawn.

In fig. 2b (Nc

=

0

rls),

the RVS-cylinder is at first better

than PVC, later on it is not so clear. Wear and tear of the

bearings can have influences, too.

Recommendation:

The PVC- and RVS-cylinders have to be compared on the pump

test rig.

3.

During disk 22 it was tried to find the optimum closing speed

of the valve. In figures 3a and 3b the C

n -

V and A - V curves

p

are given.

.t 'O.L:1l

""/~

!'1e...

711' ..

I

S"

.

:

i I I

; '1-:--!--·_-1-

.'j

'--;--'--+--c-j~'-'~;~~

.

.

I i i

I

I

-

-~--~-~----+-~---~._._~-_.~

---~~---,,---.-

.."___+.-..-...--L.____t.--..(

.

··~·-·_--I···;--k._

....

lIt.~+Q'L~r--~--~~----J-~·_-I_---.J

:

+-

tV,-r:{J.'ti+Jv/~j;

:

i

.-:- --or --.'T" - --. ----,-- -•. -.,!----._-t- -...•-~...,.._.'"-:--._,.+.

o

N(.

l;

O.

e,~

'"V!.j:

:

.

.

,~ ~-b

'l,n

---of

•

Nc..;.

. ! ____ 1 --\ . . _i·

•

•

•

L9

•

_i

1l' 1

1

.,...-

II'

+

1-!

II .9

•

't' ~ 1I

'"

0

+

•

0

,

_t I

1

L

.3

~;Io

! ' . :

1-~-_~

1

+

-.-Ne.

~ Q~~

-1.-/

j---'.-- Nt..:

o.'1i"v[i-~e.-::'

0

.If~

,..;.rj-N(.%: Q.l.tb

'I-/-s

Nr;..:

0.

~J "-',~

c

•

+

." ."

•

•

•

0

•

•

T

•

•

I

f

CI

•

'fI

•

+

l.t)

0

+

'1 0 I)

•

~

+

,

•

0

...

•

;-0

1-

L

3

A closing speed of N

=

0.45

rls

appears to be the best

c

choice. It is clear that the choice of the closing speed

is rather critical for a good performance.

4.

The RVS-pump cylinder was then tested relatively long in

three situations:

with electronically regulated valve, N

c

with electronically regulated valve, N

c

with a starting hole d

=

2.8 mm.

==

0.45

rls

=

0

rls

The results are presented in Figures 4a through 4e,

respectively: .

fig. 4a:

C

_{p.ll versus V}

fig.

4b:

A

versus V

fig.

4c:

N

versus V

fig.

4d:

2

versus V

-

8-i-~cri# ~

...(

G... W'~

'1"""~ ~ c /',

•

II 0 0

"

_D.

_'tf:

_'tIs.

•

0

₀

N"

=

II 0 D

•

0

o

"l.

J,

a

•

N

c

=

0 0

•

'"

cl=

/}

_

...

~

0

l

0.10

•

o

o

•

L

This figure clearly shows the superiority of the electronic

valve. The results have been compared with "theoretical"

curves (based on wind tunnel and pump test rig measurements,

so not including transmission losses, aerodynamic losses due

to yaw, etc.). In fact, two theoretical curves are given, one

with

n

h

=

0.65 (which is the efficiency normally measured

mec

on the pump test rig of this small pump) and

n

_mec

h

=

0.80

(which was the efficiency measured of the pump with a floating

valve~

The floating valve acts similar to the electronic valve:

at low speeds the valve remains open (it floats on the

water), at higher speeds the valve closes because of

hydrodynamic forces). The floating valve was measured on

the pump test rig recently; it will be reported soon.

Somehow the configuration of this valve seems to lead to

a better efficiency).

A

r

to

D

•

•

o o o o

"

I o

N,=

o.'f'S

"'-IS

•

NL.:

D"t./S.

o

J

=

1.

i

",-II

1

II o 0

•

0

•

0

"

•

•

.z.

1

s

T

!

-

...., vt.,../s)

1.0

This figure speaks for itself; however the closing speed

N

c

doesnot seem optimal anymore, as A remains below Ad

=

1.3

just after starting.

•

•

D D 0 C 0 IJ ~

,

"

'I

r '\

Is

Co 0

N=

0 'l.

/~

D

•

"

0

01. :-

2..8

'100 ...

•

0

"

"

c

"

0

•

<>

•

"

I 0

•

1.

2-

3

'f

S

The "knee" in the N - V curve (with Nc

with the start of water delivery.

10

-a o 0,1

D,2.

0.1

o

"

o

•

0 D

•

0

•

0

•

0 I I

2.-

J

_~

1)

We.:::

o·'f~'l"I$.

•

Nt..

~

o

~/s.

0 c:(.;

2,8-Water delivery starts at significantly lower winds peed when

an electronically regulated valve is used •

•

•

•

<> <> 0 0 . 0

'6

D G. <> D <> 0 0 0

"

D 0 0

N(,..

=

o.

..,~

t./

J

•

f'J(..

~

o

"l-/.s

0

d

=

2.,

!!

/« ...

•

•

0 0 ~ D 0

#.1.

I.e

1.2.

I,

't

/, b

},6'

---, H/d»)

In the case of no starting help, the

n

reaches approx. 0.90.

vol

In the case of a starting hole, the correspondence with theory

(0.90

*

0.90) is rather good.

-11-5.

In disk 24 and 25, the stroke of the pump was diminished from

0.1 to 0.075 m. This was done to simulate a larger starting

hole, from 2.8 rom to 3.5 rom.

To be able to compare the two situations for the same load

conditions, the parameters of the measurements with s

=

0.075 m

were corrected as follows (corrections with

*):

v*

V

0.1

=

1.1)-5 V

=

•

0.075

~*

=

2'

0~O~5

*

O. 1

1

cp.n

=

_{Cp • n . 0.075 . (1.155)3}

Figures Sa and 5b present the comparison between d

=

2.8 rom

and d

=

3.5 rom for the same load conditions.

• l(

.

)/

•

.

)(

•

•

x

x

a

II • X D IS l('

i.~

2...R'),.;-rJ.

=

3.!'''''''

J

/2

-fi:ru

sf-a.S

"

0'1

O.L

01

•

3

l( )(

"x

,,:It tJ

et,:z.f..-..

'I.J.=3S ...

It clearly makes no sense to enlarge the starting hole

diameter.

Conclusions

1.

The measurements do not give a clear answer if differences

exist between PVC and RVS cylinders.

A comparison should be done on the pump test rig.

2.

The performance of the pump with electronically regulated

valve is very sensitive to the closing speed N .

c

3.

The performance of the pump with electronically regulated

valve is

f~r

better than that of the pump with starting hole.

The pump with floating valve probably will have about the

same characteristics as the pump with electronically regulated

valve.

-

13-In figure 6 the quality factor and availability of the CWO

2000 are presented. They are based on the measurements of

figure 4a, multiplied with a Rayleigh wind speed distribution.

Figure 6 also gives the results of the CWO 5000 (with starting

hole) and the Dempster 8' (without starting help).

)

C

50

--- - - -

~Ut.-+t

100

" ,CWO 5000

"

)

-...

'"

...

,

...

CWO 2000

.. ....r;:-

du-Ir.

't.:&w.&U

~

...

v.

"

...

"

...

"

_"

_,

"

0

i i i i _I i i _I i _I

0

0,5

1,0

1,5

2,0

~

"d'V

0,10

--,'~1:a~

0,20

~.

The theory about starting holes was confirmed in the field:

-.there is a difference between "with" and "without"

starting hole

enlarging the starting hole diameter does not give an

improvemen t .

Experiments with a smaller starting hole still have to be

carried out.

-,~-Part II

Introduction

The Wind Energy Group of the Physics DepartMent of the

Eindhoven University is one of the participants

i~

CWO,

Consulting Services Wind Energy for Developing

Countries. The CWO tries to help governMents,

institutes and private parties in the Third World, with

their efforts to use wind energy and in general to

prOMote the interest for wind energy in Third World

countries. Special attention is given to Mechanically

driven water pUMping windMills.

In an early phase of the project the need for a testing

facility for full scale water pUMping windMills was

felt.

In Eindhoven, close to the preMises of the Wind Energy

Group, a test field was established. Its Main objective

is testing and iMproving newly designed windMills, as

well as developing testing procedures.

This report describes the Measuring Method used at the

CUD ZOOO in the period

85-03-Z8 until 85-08-10. This

data can be found on DATA OISK ZO through 27.

Z

Oescription of the test field

The test field is situated on the terrain of the

Eindhoven University of Technology. Eindhoven lies in

an inland region of relatively low wind speeds (4.0 to

4.5

Mis

in open terrain>, Moreover, the city and the

University buildings shade the site frOM the

predOMinant south westerly winds. The test site is

situated 1n the Middle of an open field in the east

side of the University's terrain (see fig.

1).

The

field is covered by grass and low bushes. North, east

and south at a distance of apprOXiMately

80 Meter frOM

the windMill test site, the field is bordered by a row

of dense trees and bushes. West of the test site, at a

distance of apprOXiMately

80 Meter, a row of spaced

trees is found. Height of these trees is apprOXiMately

- I

~

-The

wind~ill

locations at the test site are arranged in

a NNW-SSE line, In this way the

wind~ills

will

experience a wind flow, which is not affected by each

others wake, for wind directions

fro~

WNW to SSW and

fro~

NNE to ESE, which are the

~ost i~portant

wind

directions to be expected, (see the wind run rose in

fig. Z), Four wells are drilled at the test site.

ranging

fro~

6 to 50

~,

Since the natural ground water

level is at Z to 3

M.

and

wind~ills

are to be tested to

far greater depths, the wells are totally closed to

prevent any

infiltra~ion

of the ground water. In the

wells an arbitrary water level can be realized.

---Water

_ _ Windmill

--...-,..-

test field.

-

-

- - - Trees 110to 20m)

High b'uildingsl10 to15 floors)

.--...----,J

I

::===::,

~~~ ;=.;;;~

scate:

1:13.500

o

100 200 300 400 SOO H

,

.

I

I

I

Fig. 1 Layout of the Eindhoven University of

Technology

- I

b-fence

Fig. Z Layout of the test field

o

10m. •

windmill location (No.)

well

(depth in m.l

mast (height in mJ

winch

m

--- - data lines

D

bead I

o

5

I..i_-'_

.,

I 'I I I I

wind run rose

(for open terrain)

WINDMILL

CLOSED 'TLBEWELL

VESSEL

(~mping

height)

The windMills are arranged in closed loop

wate~

circuits (see fig. 3). Water is pUMped frOM a well into

a SMall open vessel in a tower and flows back through a

flow Meter circuit into the well.

Three Masts were erected at the test field. A

12

M Mast

(in this report called kvdl Mast) was installed at the

west side, and carries aneMOMeters and windvanes as weI

as water vessels. The distance of this Mast is within 2

to 8 rotor diaMeters frOM all windMills. Therefore

aneMOMeters in this Mast May be used for output

MeasureMents according to the lEA standards (Reference

1)

for wind directions between WNW and SSW. In the line

of windMills a Mast is included. which May be used for

wind run MeasureMents without selection of wino

directions. It is well exposed to the Main wind

directions WNW to SSW and NNE to ESE. see also above.

East of the line of windMills a Mast is

1n5~dl1ed.

which is used for testing Meteorological equipMent. and

which May be.used for output MeasureMents in

ea~terly

18

-3

Descriotion of the MeasureMents

All data are collected by Means of an autoMatic data

acquisition systeM, based on an

APPLE II

MicrOCOMputer.

Details of the Measuring systeM are described in.

reference

Z,

also SOMe details and the considerations

which led to the concept, have been published in Wind

Engineering (reference

3). Here only a brief overview

is presented.

Data is collected by Means of a Measuring prograM. This

prograM saMples the input channels. The inpu+

~icnals

are given by the sensors. which are connect en

(via

a

lightning protection) to special interface

~drd5

inside

t

he

APPLE

I

I.

_~y, at ~_ ._~.. (J u.oc....,•••_ -" .. " ~"'e"'r..", ..:.::... 11 •• _ . , .... : . :

/

:;:;.;::~.:~~~~

I

.

/ n

"

After a certain aMount of data has been collected the

data will be COMbined in a data block and registered or.

a data diskette. After finishing the MeasureMents the

elaboration prograMS can be used to investigate the

data (see fig. 4).

SWtl2JlOO

!

_{/!!lfl!fill/'-C~'}

· 0 '

Fig. 4 Situation during data collection and data

elaboration

During the

~ea5uring

period the following quantities were

registered:

Wind speed

Wind direction

one signal of an

ane~o~eters

in the

1Z

~

kvdl

~a5t

(Kaal van der Linden

~a5t)

was registered. It was the

one at a height of 6

~,

which is

the hub height of the CWO 2000.

Also at the

~ill

an

ane~oMeter

was

~ounted

next to the rotor,

~oving

along with the yawing

~ove~ent.

This

ane~o~eter

was

~ounted

on the

ar~

of the side vane.

All

ane~o~eters

are

Maxi~u~ ane~o~eters

using reed contacts.

The calibration

for~ula

used for

these

ane~o~eters

is: V = 0.39 •

f

+

0.44

(~/s)

with f = the

nu~ber

of contact closures per second.

This calibration has been proven to

be reliable and constant (see

reference

5). For each wind speed

three quantities are written on the

data disk: the total

nu~ber

of

pulses, the

~axi~u~,

and the

standard deviation of the one

second averages in a 10

~inutes

ti~e

interval. On disk these

quantities are stored as:

V-2000=QU( 9)j

~ax=QU(

19)jsd=QU(24)

V-6~

=QU(18);

~ax=QU(36);sd=QU(38)

a wind vane was

~ounted

on top of

the 12

~ ~ast

to

~easure

the wind

direction. This wind vane

(~anufactered

by t.he WEG at the

THE) operates by

~eans

of a 360

degree

potentio~eter.

The

calibration

for~ula

is:

direction

=

360 / ZS6 • U (degree)

with U

=

the converted value of the

voltage on the wiper of the

Air pressure

Tel'lperature

Rotor speed

-- ;(0

.-potentio~eter

( 5 V corresponds

with the

nu~ber ZS5)~

The reference

direction is choosen in line with

the test field. (see the wind run

rose in fig.

Z ).

Fro~

this quantity the averaged

value and the standard deviation

are written on disk as:

direction=QU(S); sd=QU(39)

an electronic

baro~eter

(l'Ianufactered by the WE6 at the

THE) is located inside the

l'Ieasuring cabin. The calibration

forl'lula is:

p =U

*

S (I'IBar) with U = the

converted value of the output

voltage

(5 V corresponds to the

nUl'lber

ZSS).

The average value of this quantity

is stored on disk as

QU(S).

an electronic therl'lol'leter (l'Iade by

the WE6 at the THE) is l'Iounted

inside a special radiation shield

at a height of

6

1'1

in the

1Z

1'1

l'Iast. The calibration forl'lula is:

T

=

1.5

*

U - Z73

(deg.

C)

with

U

is the converted value of the

output voltage (S

V

corresponds to

the nUl'lber

255).

The average value

of this quantity is stored on disk

as QU(7).

the rotor speeds are Measured by

l'Ieans of disks with a nUl'lber of

l'Iagnets l'Iounted on the rotor

shafts. Close to that disk a reed

contact is placed which gives a

contact closure every til'le a l'Iagnet

passes. The CWO ZOOO uses a disk

With 20 Magnets. Therefore the

forl'lula is: N

=

f / 20

(115)

with

f = the nUl'lber of contact closures

:2.1

-per second.

Fro~

these quantities

both the total and the

~axi~u~

value of the

nu~ber

of pulses per

second are stored on disk as:

N-2000

=QU( 10);

~ax=QU(20).

Water flow

YaWing speed

Angle of yaw

Also the value for the rotor speeds

at the MOMent that the product of

rotor speed and yawing speed

reaches a

~axi~u~

were written on

the data disk as QUCZZ).

each

~ill

uses a Spanner Pollux Z"

water

~eter

with a reed contact.

The

for~ula

for the water flow is Q

~

f

I

Z

(lIs)

for both flow

~eters.

The total

nu~ber

of pulses are

written on disk as

Q-ZOOO=QUC 11) .

the

~ill

has a yawing speed sensor

C~anufactured

by the WEG at the

THE) givi.ng a

nu~ber

of pulses

proportional to the absolute value

of the yawing speed. The

calibration

for~ula

for the sensors

is: N-yaw

=

f •

33

I

60

I

30

(115).

For these quantities both the

su~

and the

~axi~u~

values are written

on disk as:

Y-ZOOO

=

QUC1Z);

~ax

=

QUCZ1).

Also the value of the yawing speed

at the

~o~ent

the product of the

rotor speed and the yawing speed

reaches a

~axi~u~

were registered.

For the

CWO

2000 this is QU(Z3) •

the

~ill

is equipped with wind

vanes positioned just above the

rotor, fixed to the head fraMe.

These wind vanes operate

by~eans

-

12-The CUD 2000 is equipped with a

PRP

wind vane. The calibration

for~ula

is:

Delta

=

360/ZS6

*

U -

180

(degrees)

with

U

=

the converted value of the

voltage on the wiper of the

potentio~eter.

(Delta

=

0

~ean5:

the rotor plane is perpendicular to

the wind direction). For this

quantity both the average value and

the

standard· deviation are stored

as:

-2.3-4

Description of the forMula prograMs

For the elaboration of the MeasureMents two forMula

prograMs were written for the Mill (a forMula prograM

is a user prograM for the Main elaboration prograMs,

these prograMs are described in reference Z>. The first

forMula prograM gives the outputs of all sensors. No

forMula prograM to calculate MaxiMUM speeds was used,

as the ten-Minute averages of the windspeed have not

exceeded 10

MIs

in the Measuring period. The two forMula

prograMs for the CWO ZOOO calculate the following

Quant

i t

i es :

ForMulas CWO ZOOO sensors

V-ZOOO

(Mis)

( wind speed near CWO ZOOO)

Z

N

(Rls)

(rotorspeed in revolutions per

5)

3

Q

(lis)

(waterflow in

I i

ters per

15)

4

Y

(Rls)

(yawing speed in rev. per

5)

5

Delta (deg)

(angle of yaw in degrees)

6

Oir ( deg)

(wi nd direct ion related to fig Z)

7

p (MBar)

( air pressure)

B

T (deg C)

( air te",perature)

In order to calculate the output perforMance according

to the recoMMendations of the lEA (see reference

I),

the values for the water flow are norMalized to an air

teMperature of 15 Deg C and an air pressure of

1013.3 MBar. The sa",e corrected value is also used for

the calculation of the efficiency (Cp-eta). Of course

for the calculation of the pUMp voluMetric efficiency

the uncoMpensated value is used.

In order to fulfil the recoM",endation of the lEA to

place the aneMoMeter between Z and 8 rotor diaMeters

frOM the wind Mill, the aneMoMeters in the

lZ '"

Mast

should be used for calculating the perfor",ance. Since

it was shown in Ref.3, however, that the aneMoMeter at

the windMill gives a More accurate indication of the

windspeed acting on the rotor, the signal fro", this

aneMOMeter was used in the calculations.

This iMplies that all winddirections could be accepted

except those which are More or less in line with the

/

-

24-:~

: ST

lUST

100

RE~

tttjt

FOR"-ULAS CWD 2000 OUTPUT

.tt••

110 REM THIS PROGRAM ONLY WORKS AFTER CO"PILATION TOGETHER WITH 'BIN SORT'

120

RE~

ttttt

COMPILATION

INFOR~ATION:

THE LIBRARY MUST BE LOADED

AT

4000

130

REM

THE PROGRAM MUST START AFTER H6RI

140 REM

THE VARIABLES MUST START AT

2051

'

150 REM AFTER COMPILATION THE HIGHEST MEMORV LOCATION IS NOT ALLOWED TO BE HIGHER THAN

lagl0!~

160

REM

I

INTEBER HQ

170

RE"

I USECO~"ON Hg,GU(50)~QF(9},"IN!9It"AX(9}LTS(9)

180 REM THE MAXIMUM VALUE FOK NG=9jTHE

"A~IMUM

LtNSTH OF THE Tf'S IS 12 CHARACTERS

190 IF H9

<

>

0 THEN 400

.

200

REM DEFINITION OF CONSTANTS

&

STRINGS

210 NQ

=

9:PI

= 3.14159:6 = 9.91:0 =

2:H

=

a.5:VOL

= .3526: REM VOL=Plf4t.Ob7t.067t.1tl000 (L!

215 QCR

= 1.055: REM QCR=I.S/S'1013.3/28a.15

220

TSIOl

=

"CWD 2000

OUTPUT"

230

TS!l) = "V-KVDL

(~fS)":A!

=

.39:91

= .44:MAXfl1 = 20

240 T'!2l

=

·V-2000

(K/S1":MAX(ZI =

ZO

250

TSl31 =

"N

!RfSI":A3 = 1

!

20:KAXl31 =

5

260

TS(41 =

"9

IL/SI":A4 =

.5

t

QCR:~AX!41

= 1

270 T'(Si

= "DELTA !DES1":AS =

360 / 256:95

= - 180:"INIS) = -

20:MAX!51

=

180

280

T'I61 = ILA"BOA":Ab = PI • D:MAX(bl =

4

290

TSI]I =

"ep

ETAI

(~I":A]

=

6

l

H/

.5 / 1.225 / PI / D/

D

l

4

t

100:"AX(71

=

SO

300 TS(Bl

=

"CP ETA2 (!}":KAXISl

=

50

310 T$(9)

= "ETA-VOL (IJ":A9 = .S

I

VOL t

100:MAXI9! =

200

390

RETURN

400 RE" DEFINITION OF

FOR~ULAS

410

QF!1l

=

GUm)

t

Al

+

81: IF QUlI8)

=

0

THEN QF!1l =

B1

J

2

420

QF(ZJ

=

UU!?J

t

Al

+

Bl:

IF

QU(91 : 0

THEN QFl2J

=

91 /

2

430

9F(3J

=

QU(10) t

A3

440 OF (4

j

=

UU

i1

1)

t

au

{71

!

QU (8l

t

A4

450 QFiSi

=

QUIll

t

AS

+

85

460 QF(6)

=

QFl3!

i

QF(Zl

t

Ab

470 QF!})

=

QFI41 /

9Ftll / QFH!

J

GF(1)

t

A7

480

OF/B)

=

QF(41

!

QFIZI !

QF!2l

!

QF(ZI •

A7

490 QF(9i

=

0: IF QF!31

>

0 THEN QF(9l

=

9Ulill

f

QFI3l

t

A9

495 IF OUIS}

>

= 234.67 OR OUISl

<

= 21.33 OR (OU(S)

>

= 106.67 AND QU(Sl

<

= 149.33) THEN QF(Ol = 1

4q6

IF GU(2Sl \ 40 OR GU(39l } 40 THEN GF(Ol

=

1

500

RETURN

row of windMills.

Measure~ents

at winddirections as

indicated

by

the figure were excluded.

e,xc.kk,(

---+-4rr~~...,~---,f..Mo~_+_---

row

~F

WI""

eM

iLL.

~

Finally a selection is used 1n the output forMulas

prograMs. With this selection MeasureMents are ignored

of which the standard deviation of delta or the wind

direction is too large. This happens only occasiOnally.

and is caused

by

a Measuring error.

5

Test circuMstances of the

CWO ZOOO

For this testing period the following facts need to be

Mentioned:

- Disk

ZO: PVC-cylinder with new piston cup and

electronically regulated valve.

- Disk ZI through

27= Stainless steel pUMpcylinder

- Disk

21 through 23: Electronically regulated valve

with various valve closure speeds.

- Disk

24, Block

1 -

20: Starting hole Z.8 MM; saMe

design windspeed as before.

- Disk

24, Block 21 - 31; disk Z5, Block

1

-20:

Starting hole

Z.8 MM; reduced stroke of 0.075 M for

0.1 PI.

- The rest of the PleasurePlents hp"'" been disregarded

because of Malfunctioning of the

wa~er

Pleter.

During the Pleasuring period the

CWO

2000 operated under

the following conditions:

Location

Suction line

well

Pressure line

Pressure vessel

PUPIP

5

(see

fig.

Z)

length

17.5

M.

diaMeter

1"

location

4,

water level

5

M below

ground level (exept during block

Z4-26 of data disk 17, were the

well beCaMe ePlpty, see above)

length

12 PI. diaPleter

I"

3.5 M above ground level, in the

12

M l'Iast

stroke volUMe

0.362

I

resp.·

0.3526 1: stroke

0.1

1'1

(MaxiPluM)

resp.

0.075 PI,diaMeter 0.068 PI

resp.

0.067

1'1.

SOl'le design specifications of the

CWO

2000 are:

Purpose

Rotor

water lifting; designed for use in

low and l'Ioderate wind regil'les

(yearly averages below 5

1'1/5)

typical design wind speed 3 I'Ils

horizontal axis; kept in up wind

position by balance of side vane

TransMission

and exentric rotor; rotor diaMeter

Z

IYI,

6 blades of galvanlzed steel

sheet; fixed pitch

direct drive crank MechaniSM with

Control systeMs

PUI'lP systel'l

TOlder

Capacity

Operating wind

speeds

Aerodynal'lic

properties

Weights

Cost

adjustable stroke and swing arM;

strokes

25 -

100

MM; balanced pUMp

rod weight

aver speed control by yawing,

activated by exentric rotor and

hinged side vane systel'l

single action piston pUl'lp with

starting nozzle and air chal'lber

nOl'linal pUl'lp dial'leter

65

MI'I

steel tubular l'Iast; heigth

6.5

1'1;

can be lowered by l'Ieans of hinges

in the tower base

< _

25000 llday at 5 M static head and

3.5

1'1/5

average wind speed

cut-in

2.5

Mis

rated

6.U

1'115

survival

40

Mis

lal'lbda <tip speed ratio)

1.3

Cp (Max) 0.29

solidity 0.35

total (excl. foundation): ca 150 kg

Materials ca

US

$

150

-u-~

PP-/NT

DIfrA

_r~Y

_{2.7 -}

_J

_I

J)

flo,

DPrTA

_f~

1:2..

-

S1...

--

_1-.1

-I,

"

P

j{irJr

DA-TIt

DATE

TIME

~! ~T

"'"

f."-'

_ND

/oil N~ .i'-~l 1 i l(i! ,,(, lIe:

BLOCK

1

85-03-28

!5:42:P

~JjO .,~

lB

50

p

₁₀

".-,

f~

"

...

BLDCr.~

_"

85-

1

)3-2q

03:42:29

600

.,,,

18

50

8

10

22

;. BLDC~~:

3

85-(:3-29

15:42:39

600

";'"

₁₈

₅₀

₈

₁₀

~..,

,-

k ..

BLOCr.:

4

85-03-30

03:!2:49

600

'7")i~

₁₈

₅₀

₈

F'

.v

"..,

.:.

...

~!

nrk'"

₅

_85-03-30

_15~42;59

_{600 72}

₁₈

₅₀

₈

₁₀

""

"" ...-wn I.i-3LQC~~ ;

85-03-31

(/3.: 43:0

0

₆₍

₁₎

,")

₁₈

₅₀

g

₁₀

_""

i..i.. B~DCK

.,

f

85-03-31

15~43~19

bOO

72

18

50

a

".

1~j

22

BLOCK 8

85-04-01

03:43:29

600 40

'Q_lw

₅₀

₈

Fl_.V

₂₂

PI'i!"'V

₉

_85-04-01

_11:22:32

_{600 72}

₁₈

₅₀

a

₁₀

." "" .... 1.:...1·.

BLOCK

10

85-04-01

23:22:42

600

72

18

50

a

10

22

!)fJk

BUiCK

11

95-04-02

1

~_{1 ...}

I

'~I.101 . .C;?

₆₀₀

₇₂

₁₈

₅₀

₈

₁₀

₂₂

_2...0

ELDCK

12 85-04-02

23:23:02

600

'"I"

; 4 'Qlw

₅₀

₈

₁₀

₂₂

BLOCK

13

85-04-;')3

12:42:38

1

600

72

18

50

8

10

..,,,

...

'Q!j'j"l.V ' J

85-04-04

1

j,,, . .,..,

₁

600 72

₁₈

50

₈

10

22

W-.U .... · ~"t

...

,

...

Qf

r-rv 15

_B5-04-04

_23:22:32

₁

_YjO

'"1'1

₁₈

₅₀

a

₁₀

₂₂

• • Uw", iJ.

FLDry

1-6

85-04-05

11:22:42

1

bOO

72

18

so

8

10

22

BLOCK

17

8S-()4-05

23:22:52

1

bOO

72

18

50

9

10

22

BLOCK

18 85-04-06

13:56:02

1

600

'7"i~

₁₈

_SO

₈

₁₀

₂₂

l:il r'l"k"

₁₉

_8S-04-07

_01:56:12

₁

₆

Mi

₇₂

₁₈

so

a

₁₀

₂₂

~__ l", ~"

BLDCK

20

85-04-07

13:56:22

1

600

72

18

50

8

10

22

BLOCK

21 85-04-08

01:S6:32

1

600 69

18

50

8

10

22

BLOCK

22 85-04-08

13:37:01

1

600 72

18

50

8

10

22

BLOCK

'1<

_85-04-09

_{01:37: 11}

₁

₆₀₀

₇₂

₁₈

₅₀

₈

₁₀

""

l.-'> i-l.

BLGCK

24 85-04-09

13:37:21

600 72

18

50

8

10

22

BLOCK 25

85-04-10

01:37:31

600 72

18

50

8

10

22

BLOCK

26 85-04-10

13:37:41

f

600

72

18

so

8

10

'1'1 1

i-.I-BLOCK

27 e:H4-11

01:37:51

1

600 62

18

50

8

10

22

BLOCK

28 85-04-11

13:43:22

1

600

72

18

50

a

10

22

BLOCK

29 8S-04-12

01:43:32

1

600

72

18

50

8

10

22

BLOCK

30 85-04-12

13:43:42

1

600

72

H!

SO

S

10

22

BLOCK

<'

_,,'

_85-04-!J

_01:43:52

₁

_bOO

₇₂

₁₈

₅₀

₈

₁₀

₂₂

DATE

TIl'!E

BT

TT

_{I .}

_N!1

_NC

_ND

_N1

_N2

_HE

BLOCK

1

8S-04-17

14:49:17

600

72

18

50

a

10

22

BLOCK

2

8S-04-18

02:49:26

600

72

18

50

9

10

22

BLOCK

3

85-04-18

14:49:36

bOO 72

18

SO

8

10

22

BLOCK

4

85-04-19

02: 49: 46

600

61

18

so

8

10

22

BLOCK

~

85-04-19

13:05:59

600

72

18

50

a

10

22

oJ

BLOCK

6

85-04-20

01:06:09

600

72

18

SO

B

10

22

BLOCK

7

85-04-20

13:06:19

600

72

18

50

8

10

22

BLOCK B

85-04-21

01:06:29

600

72

18

so

8

10

22

VIJ/(

2/

DATE

TI!'!E

BT

TI

N/'I

NC

ND

Nl

N2

HE

BLOCK

12 85-04-23

15:50:19

1

600

72

18

50

9

10

21

BLOCK

.

1,)

.,

85-04-24

03:50:29

1

600 69

18

50

8

10

22

BLOCK

14 85-04-24

16:15:08

1

600

72

18

SO

8

10

22

BLOCK

15 8S-04-25

04:15:18

1

600

72

18

50

8

10

22

BLOCK

16 85-04-25

16:15:28

1

600

72

18

SO

8

10

22

BLOCK

17

85-04-26

04: 15: 38

1

600

57

18

SO

8

10

22

BLOCK

18 85-04-26

13:59:27

1

600

72

18

50

8

10

22

BLOCK

19 8S-04-27

01:59:37

1

600

72

18

50

8

10

22

BLOCK

20 85-04-27

13:59:47

!

600

72

18

SO

8

10

22

BLOCK

21

85-04-'28

01:59:57

!

bOO

72

18

50

a

10

22

BLOCK

22 85-04-28

14:00:07

1

600 24

18

50

8

10

22

BLOCK

23 85-04-2S

18:07:38

1

600

72

18

50

8

10

"?

_4.

BLOCK

24 85-04-29

06:07:45

1

600

72

18

50

8

10

22

BLOCK

?~_.oJ

_8S-04-29

_18:07:58

₁

₆₀₀

₇₂

₁₈

₅₀

a

₁₀

₂₂

BLOCK

26 85-04-30

06:08:08

1

600 72

18

so

a

10

22

BLocr

27 85-04-30

18:08:18

1

600

72

18

50

e

10

.1.'1"

BLOCK

28 95-05-01

14:00:12

•

1

600

72

18

50

B

10

22

BLOCK

29 85-05-02

02:00:22

1

600

.,.,

I .

18

50

9

10

22

BLOCK

30 8S-05-02

14:00:32

1

600

72

18

50

8

10

22

BLDCK

31

gc;-I)C;-IH.... v , , " \ l Y

_02:00:42

₆₀₀

₇₂

₁₈

₅₀

a

₁₀

₂₂

-

30

-If

prUN

r

j)ftTf}

1/

DATE

T!~E

BT

T!

N:'l

lii-ND

_'"

N'

NE

;~~ I~ ~ 3LCC~~,

1

S5-05-0~.

16:

f

_)5:

1:

6:)::1

₁₈

r:/\

₈

₁₀

'}I") ,

-

,J'.,.' ,,~ B:"GC~ If _:5-~)5-::::A

i:4:05:22

6~j(! ~..,

_:8

_:1)

a

10

"1"1 ,....;.. llj,!;'".~, _-35-~::5-(\~

_1,=:05:32

_:~O'.)

n

₁₈

₅₀

₉

f,·,

₂₂

...

-

...,. iV BLDC~:

4

85-(;5-(~5

04:05:42

6~)(! .,~ _iQ C'l·

3

10

1"1 ::.. .. 1_, ~!)

....

9LQC~'

5

8~-(15-:')5

_!6:05::2

.~t.)o "'~

18

:0

8

10

'I'!

_...

~ B~OCK

6

8:--

i

_)5-:)6

04:06:

f

_:'2

61)(} "1'"i~

₁₈

₅₀

₈

₁₀

₂₂

2~OC~:: S5-Q5-;')~

tb:;):: 12

600 72

lc

50

8

1

~)

'1"

...

B~_CCK

8

-35-05-07

1::4:06:

22

600

51

18

50

8

10

'1'1 .i.~

BLiJC'{

if

25-05-07

:2:47:01

60!:

72

18

50

8

10

·1'"1 ok':" 8~DC~:

10 85-

r

_j5-0B

_{00:47: 10}

₆₀₀

'711

₁₈

₅₀

₈

₁₀

')'1 i ....

...

BLOCK

1

!

85-(}5-0S

12:47~19

600

7'1

₁₈

₅₀

₈

₁₀

₂₂

BLDer.:

12

85-(15-,)9

_Oe:47:28

₆₀₀

,S'?

'j:l

₅₀

₈

₁₀

~r; l~

...

BLC2K

13

85-~)5-t)9

12:33:21

600

72

18

50

8

10

",.,

3LDC~:

14

85-~)5-1

0

O(~:

33; 31

j".,t",

72

18

5(~

S

!O

22

])/JI<

22..

"",~j!j t,ll,rv

₁₅

_85-05-10

_12:33:~1

&00

72

i8

50

8

10

"I'; .,LJ~:.. i.i..

PLGCY

:6

85-05-; 1

0(1: 33: 51

~f""\_...·v

72

18

50

9

10

~'j BL:~r

17

85-(}5-1

t

12:34:Ql

600

72

18

SO

8

10

"I" ~" B~QC~:

1:3

85-!)5-12

OO:34:1!

600 72

:S

50

S

10

22

B~C2~' f ;"

85-05-1:?

t').1''' .. ':;.

₆₀₀

₇₂

₁₈

₅₀

a

₁₀

'1')

"

l ...,,~... I 6.i.. BLCCf~'

20

85-05-13

00:34:31

600

51

18

50

8

ii'_.'J

₂₂

BLOCi

21

g5-(:5-13

('9: 12:42

600 72

18

50

8

10

22

B'

N " I

.,.,

85-05-13

21:12:52

600 72

18

50

8

10

"1'1 ;~:.J!...''l.. i.~ _~"

BLDCK

~"~.:.'

_35-05-14

(,Q."1 • • ·..1.;. rVi·'"J ...

_{600 37}

₁₈

5(j

₈

₁₀

22

BLQC~: 2~

85-05-14

15~34:32

600 72

1B

50

8

10

')'1

....

BLOCK

25

25-05-15

03:34:42

600 70

18

50

9

10

22

SLaCK

26 '35-05-15

15:47:40

io"lI"_v'JV

₇₂

₁₈

₅₀

₈

₁₀

'l'1

."

Bi

_{... i'.}

nr;(

_{27 8S-05-1!:}

_03:47:50

_{600 72}

₁₈

₅₀

_S

₁₀

₂₂

BLOCK

28

85-05-16

15:48:00

600

72

18

50

8

10

22

BLOCK

29 85-'j5-17

03:48:10

600

72

18

50

e

10

Z2

BLaCK

30 35-05-17

15:48:20

1

600

'7"1_{! ...}

₁₈

₅₀

₈

₁₀

₂₂

BLDCK

31

85-05-18

03:48:30

1

600

72

18

50

8

10

22

DATE

TI!'lE

aT

TI

NI1

NC

ND

'11

N2

NE

BLOCK

.

I

85-05-18

16:16:30

600

72

18

50

8

10

22

BLDCK

2

85-05-19

04:16:40

600 72

'IIlw

so

₈

₁₀

₂₂

BLOCK

or.J

_85-05-19

_16:1·&:50

₆₀₀

'7'1_{I i .}

₁₈

₅₀

₈

₁₀

₂₂

BLGCK

4

85-05-20

04:17:00

bOO

72

18

50

8

j "• J ')"1

."

81

rr~

₅

_85-05-20

_16:46:25

₆₀₀

₇₂

₁₈

₅₀

₈

₁₀

'l'"i ~UW".

..

...

BLDCK

6

85-05-21

04:46:35

60(1

72

18

50

8

10

22

BLOCK

7

85-05-21

16:46:45

600 72

18

50

B

10

22

_])/11<

2-BLDCK

8

85-05-22

04:46:55

600 72

18

50

8

10

'1"_I.';'

BLDCK

9

85-05-22

!6:47:05

600

72

18

50

8

10

22

BLGCr

10 85-05-23

04:47:15

600 32

18

50

8

10

22

BLOCK

11

85-05-23

13:06:31

600

72

18

50

8

10

22

BLOCK

!2 85-05-24

01:06:41

_•

600

72

18

50

8

10

22

BLOCK

\'t. J

_85-05-24

_13:06:51

₁

_{600 72}

₁₈

₅₀

₈

₁₀

₂₂

BLDCK

14 85-05-25

01:07:01

1

bOO

"'.,

I~

18

50

8

10

22

BUiCK

15

85-05-25

13:07':12

1

600

72

18

50

8

10

22

BLOCK

16 85-05-26

01:07:22

1

600 72

18

50

a

10

22

BLOCK

1"'•.r

_85-05-26

_13:07:32

₁

_bOO

_7"

...

₁₈

₅₀

₈

₁₀

₂₂

BLOCK

18 85-05-27

01:07:42

1

bOO

72

18

50

a

10

22

BLOCK

19 85-05-27

13:07:52

1

600 72

18

50

8

10

22

BLOCK

20 85-05-28

01:08:02

600 72

18

50

8

10

22

BLOCK

')1_~.

_85-05-28

_13:08:12

₆₀₀

₇₂

₁₈

₅₀

₈

₁₀

₂₂

BLuCK

22 85-05-29

01:08:22

600

72

18

50

a

10

22

BLOCK

'1"_{. J}

_85-05-29

_13:08:32

_{600 72}

₁₈

₅₀

₈

₁₀

₂₂

BLOCK

24

85-05-30

01:08:42

bOO

7'1_,~

₁₈

₅₀

₈

₁₀

₂₂

BLOCK

25 85-05-30

!3:08:52

600 72

18

50

8

10

22

BLOCK

26

85-05-31

01:09:02

bOO

72

18

50

8

10

'1"~.