5th April 2011

2015

ClimaCheck PA PRO Performance Analysis

Page | 2

ClimaCheck Performance Analysis Report

Date:

Site:

Purpose of Report: ClimaCheck Analysis of Climaveneta Turbocor chiller

__________________________________________________________________________ Executive Summary Recommended measure Effic.

% Symb. Comments

Sub efficiencies and key functionality aspects

Cycle Performance COP 4.72

System was found to operate with an overall good and consistent efficiency. This is due to the fact that Turbocor compressors are optimised for part load conditions.

Compressor 72%

Due to the compressor design, good overall performance was noted with an outstanding part load efficiency.

Refrigerant charge

Due to a consistently high subcooling and high condensing temperature, it is possible that the system could be overcharged with refrigerant causing excess liquid to be stored in the condenser. This could however be due to the majority of compressor run time being spent part loaded.

Superheat

Superheat was found to be acceptable and consistent.

Expanison device

Expansion device was found to be maintaining a good constant average superheat.

Evaporator performance

Evaporator temperature was found to be good and consistent with a good approach temperature.

Condenser performance

Condenser performance was found to be poor with a consistently high condensing temperature when at the higher spectrum of load. This could be due to excess fouling of the condenser and/or refrigerant overcharge. We would also recommend investigation into the condenser pressure control settings and setpoint to see if it has been set too high.

Controls

The controls do not enable compressor B to run. There were no operating hours for compressor B logged for the seven days nor at any time. There is a facility, using the manufacturer’s control software login to modify this setting so as to balance the circuit sequencing / compressor loading.

Used Symbols in table overview

Correct function and performance

Incorrect function and/or performance

Unclear function and/or performance Could not be measured or reference values to benchmark not available

Warning – issue or suspected issue that can result in serious problem/failure. It is recommended that issue is addressed without delay.

Maintenance or repair is required

Further investigation is required

Page | 3

Introduction This report has been compiled in order to ascertain, analyse and report on the running conditions of the Turbocor compressors installed within the Climaveneta TEC-S series chiller installed at XXX. In order to achieve the desired results, 7 days of data – from 1

st March 2015 to 7

th March

2015 has been collated. Business Edge has recorded data from the outset of the ClimaCheck installation. For these separate 24 hour data logs, we have determined the minimum, maximum and average parameter running conditions for the machine, together with an operational snapshot, which shows a stable running log of the chiller. The following pages contain the captured data and our observation / comments:

Page | 4

PERFORMANCE ANALYSIS: 1st

March 2015

SecC

Evap

in

(°C)

SecC

Evap

ou

t

(°C)

Ref L

ow

pre

ss.

(Bar(g

))

Ref E

vap

Mid

po

int

(°C)

Ref C

om

p in

(°C)

Su

per h

eat (K

)

SecW

Co

nd

in

(°C)

SecW

Co

nd

ou

t

(°C)

Ref H

igh

pre

ss.

(Bar(g

))

Ref C

on

d M

id

po

int (°C

)

Ref E

xp

. Valv

e in

(°C

)

Su

b c

oo

l tota

l (K

)

Ref C

om

p o

ut

(°C)

Pre

ss. R

atio

Co

mp

. Isen

. eff*

Po

wer in

pu

t C

om

p. (k

W)

CO

P C

oo

l

Cap

. Co

ol (k

W)

CO

P H

eat

Cap

. Heat (k

W)

Am

ps L

1 (A

)

Am

ps L

2 (A

)

Am

ps L

3 (A

)

Po

wer F

acto

r

Vo

lt L1 (V

)

Vo

lt L2 (V

)

Vo

lt L3 (V

)

Po

wer in

pu

t

Co

mp

. 2 (k

W)

An

nu

al o

pera

ting

ho

urs

Co

olin

g (h

)

Data

Snapshot 8.8 7.0 2.00 0.8 6.5 5.7 12.4 34.5 8.07 35.9 27.2 8.7 54.1 3.02 72.0 60.3 4.72 284.3 5.65 340.3 88.38 88.38 92.34 0.93 238.90 239.40 241.10 1.4 2547

Minimum 8.0 6.7 1.66 -2.5 4.8 -0.1 5.0 3.9 2.47 4.9 5.4 -1.9 14.0 0.99 -7.4 0.0 4.3 0.0 5.3 0.0 1.38 1.38 1.38 -0.08 235.30 235.50 237.50 1.3 -102

Maximum 10.0 8.8 2.98 8.8 16.0 10.5 13.5 36.4 8.61 38.0 29.2 11.1 56.8 3.28 103.3 65.2 100.0 313.4 100.9 364.7 97.44 97.92 102.18 0.93 246.30 246.20 248.40 1.9 35657

Average 8.7 7.3 2.12 1.9 7.9 6.0 10.4 27.7 6.63 29.1 21.3 7.8 45.0 2.47 68.5 39.1 10.4 218.4 11.4 254.7 58.90 58.98 62.26 0.81 240.10 240.18 242.24 1.4 3099

Comments: - The system is found to be operating with the correct refrigerant charge as the subcooling and superheat suggests. - Condensing temperature is higher than expected as ideal is 15K above ambient (23.5K in this case). Condenser performance lower than expected.

- Evaporator temperature found to be acceptable. Approach temperature (i.e. Evap. In – Evap. Temp.) is 6.2K. - Compressor still operating with a good efficiency of 72% and a good COP of 4.72. - It is noted that compressor A was duty compressor all day with no running hours for compressor B.

Page | 5

PERFORMANCE ANALYSIS: 2nd

March 2015

SecC

Evap

in

(°C)

SecC

Evap

ou

t (°C

)

Ref L

ow

pre

ss.

(Bar(g

))

Ref E

vap

Mid

po

int

(°C)

Ref C

om

p in

(°C)

Su

per h

eat (K

)

SecW

Co

nd

in

(°C)

SecW

Co

nd

ou

t

(°C)

Ref H

igh

pre

ss.

(Bar(g

))

Ref C

on

d M

id

po

int (°C

)

Ref E

xp

. Valv

e in

(°C)

Su

b c

oo

l tota

l (K

)

Ref C

om

p o

ut

(°C)

Pre

ss. R

atio

Co

mp

. Isen

. eff*

Po

wer in

pu

t

Co

mp

. (kW

)

CO

P C

oo

l

Cap

. Co

ol (k

W)

CO

P H

eat

Cap

. Heat (k

W)

Am

ps L

1 (A

)

Am

ps L

2 (A

)

Am

ps L

3 (A

)

Po

wer F

acto

r

Vo

lt L1 (V

)

Vo

lt L2 (V

)

Vo

lt L3 (V

)

Po

wer in

pu

t

Co

mp

. 2 (k

W)

An

nu

al o

pera

ting

h

ou

rs C

oo

ling

(h)

Data

Snapshot 9.0 7.2 1.99 0.7 7.1 6.4 8.0 28.0 6.66 29.9 20.7 9.2 47.7 2.56 71.0 50.2 5.78 289.8 6.71 336.4 72.30 73.62 77.94 0.92 239.10 239.20 242.00 1.3 2582

Minimum 7.9 6.7 1.82 -0.9 6.3 -0.4 3.8 2.8 2.34 3.8 4.4 -2.4 11.1 0.99 -195.1 0.0 -1426.4 0.0 -1425.5 0.0 1.32 1.32 1.38 -0.09 236.50 236.70 239.60 1.3 -20337

Maximum 10.0 10.0 3.13 10.0 13.8 7.3 9.8 28.4 6.86 30.7 21.9 12.4 48.5 2.66 92.4 50.9 3145.5 308.7 3146.4 353.7 75.78 76.20 81.06 0.92 246.90 246.80 248.80 1.6 27970

Average 8.7 8.6 2.70 6.7 11.4 4.7 6.7 8.3 3.02 8.6 8.3 0.4 16.5 1.11 1.8 3.5 45.6 20.9 46.6 24.2 6.37 6.46 6.86 0.02 241.60 241.41 244.06 1.4 -147

Comments: - The system is found to be operating with the correct refrigerant charge as the subcooling and superheat suggests. - Condensing temperature is higher than expected as ideal is 15K above ambient (21.9K in this case). Condenser performance lower than expected.

- Evaporator temperature found to be acceptable. Approach temperature (i.e. Evap. In – Evap. Temp.) is 6.5K. - Compressor still operating with a good efficiency of 71% and a good COP of 5.78. - It is noted that compressor A was duty compressor all day with no running hours for compressor B.

Page | 6

PERFORMANCE ANALYSIS: 3rd

March 2015

SecC

Evap

in

(°C)

SecC

Evap

ou

t (°C

)

Ref L

ow

pre

ss.

(Bar(g

))

Ref E

vap

Mid

po

int

(°C)

Ref C

om

p in

(°C)

Su

per h

eat (K

)

SecW

Co

nd

in

(°C)

SecW

Co

nd

ou

t (°C

)

Ref H

igh

pre

ss.

(Bar(g

))

Ref C

on

d M

id

po

int (°C

)

Ref E

xp

. Valv

e in

(°C

)

Su

b c

oo

l tota

l (K

)

Ref C

om

p o

ut

(°C)

Pre

ss. R

atio

Co

mp

. Isen

. eff*

Po

wer in

pu

t

Co

mp

. (kW

)

CO

P C

oo

l

Cap

. Co

ol (k

W)

CO

P H

eat

Cap

. Heat (k

W)

Am

ps L

1 (A

)

Am

ps L

2 (A

)

Am

ps L

3 (A

)

Po

wer F

acto

r

Vo

lt L1 (V

)

Vo

lt L2 (V

)

Vo

lt L3 (V

)

Po

wer in

pu

t

Co

mp

. 2 (k

W)

An

nu

al o

pe

ratin

g

ho

urs

Co

olin

g (h

)

Data

Snapshot 9.5 7.6 2.03 1.0 7.3 6.3 10.6 33.5 7.92 35.3 26.6 8.7 53.5 2.94 72.6 60.2 4.90 295.0 5.83 351.0 89.70 88.38 93.72 0.93 237.00 236.30 239.20 1.5 2433

Minimum 8.0 6.6 1.79 -1.2 5.9 3.2 4.6 3.3 2.43 4.6 5.1 -1.2 12.8 0.99 -1697.1 0.0 -1430.5 0.0 -1429.6 0.0 1.32 1.32 1.44 -0.09 235.00 234.50 237.50 1.2 -2286

Maximum 10.0 9.9 3.13 10.0 13.7 9.1 11.0 34.3 8.20 36.4 26.8 12.0 54.3 3.01 3928.5 61.0 3857.3 524.8 3858.2 531.7 93.48 92.40 96.30 0.93 246.80 246.70 248.80 1.9 5321

Average 9.1 7.8 2.28 3.2 8.8 5.6 8.3 23.0 5.80 24.4 18.2 6.2 38.6 2.15 92.8 35.5 78.9 196.6 79.8 229.6 53.23 53.59 56.33 0.62 239.07 238.85 241.43 1.4 1859

Comments: - The system is found to be operating with the correct refrigerant charge as the subcooling and superheat suggests. - Condensing temperature is higher than expected as ideal is 15K above ambient (24.7K in this case). Condenser performance lower than expected.

- Evaporator temperature found to be acceptable. Approach temperature (i.e. Evap. In – Evap. Temp.) is 6.6K. - Compressor still operating with a good efficiency of 72.6% and a good COP of 4.9. - It is noted that compressor A was duty compressor all day with no running hours for compressor B.

Page | 7

PERFORMANCE ANALYSIS: 4th

March 2015

SecC

Ev

ap

in (°C

)

SecC

Ev

ap

ou

t (°C)

Ref L

ow

pre

ss.

(Bar(g

))

Ref E

va

p M

idp

oin

t

(°C)

Ref C

om

p in

(°C)

Su

per h

eat (K

)

Sec

W C

on

d in

(°C)

Sec

W C

on

d o

ut (°C

)

Ref H

igh

pre

ss

. (Bar(g

))

Ref C

on

d M

id p

oin

t (°C

)

Ref E

xp

. Va

lve in

(°C)

Su

b c

oo

l tota

l (K)

Ref C

om

p o

ut (°C

)

Pre

ss. R

atio

Co

mp

. Ise

n. e

ff*

Po

wer in

pu

t Co

mp

.

(kW

)

CO

P C

oo

l

Cap

. Co

ol (k

W)

CO

P H

eat

Cap

. He

at (k

W)

Am

ps L

1 (A

)

Am

ps L

2 (A

)

Am

ps L

3 (A

)

Po

wer F

acto

r

Vo

lt L1 (V

)

Vo

lt L2 (V

)

Vo

lt L3 (V

)

Po

wer in

pu

t Co

mp

. 2

(kW

)

An

nu

al o

pera

ting

ho

urs

Co

olin

g (h

)

Data

Snapshot 9.4 7.5 2.05 1.2 7.4 6.2 11.3 34.1 8.08 35.9 26.8 9.1 54.3 2.97 72.2 61.8 4.82 297.9 5.75 355.3 91.68 92.28 96.42 0.93 236.40 236.50 239.40 1.4 2523

Minimum 7.5 6.6 1.83 -0.8 6.1 -0.1 3.2 1.5 2.20 2.6 4.2 -2.5 8.8 0.99 -5513.4 0.0 -19863.5 -674.4 -19862.6 -674.0 1.38 1.32 1.38 -0.33 233.30 233.40 236.20 1.3 33

Maximum 21.4 21.3 3.53 12.8 19.3 7.9 11.3 35.9 8.69 38.3 30.1 12.4 54.8 3.09 1645.3 61.8 52913.3 570.8 52914.3 602.9 92.58 92.46 98.04 0.93 246.20 246.20 248.30 1.9 22257

Average 10.9 9.5 2.28 3.2 8.8 5.7 8.8 24.9 6.27 26.5 20.2 6.2 41.5 2.27 48.9 40.6 35.3 215.8 36.2 253.5 60.66 60.83 63.94 0.66 238.80 238.64 241.20 1.4 2114

Comments: - The system is found to be operating with the correct refrigerant charge as the subcooling and superheat suggests. - Condensing temperature is higher than expected as ideal is 15K above ambient (24.6K in this case). Condenser performance lower than expected.

- Evaporator temperature found to be acceptable. Approach temperature (i.e. Evap. In – Evap. Temp.) is 6.3K. - Compressor still operating with a good efficiency of 72.6% and a good COP of 4.9. - It is noted that compressor A was duty compressor all day with no running hours for compressor B.

Page | 8

PERFORMANCE ANALYSIS: 5th

March 2015

SecC

Evap

in

(°C)

SecC

Evap

ou

t

(°C)

Ref L

ow

pre

ss.

(Bar(g

))

Ref E

vap

Mid

po

int

(°C)

Ref C

om

p in

(°C)

Su

per h

eat (K

)

SecW

Co

nd

in

(°C)

SecW

Co

nd

ou

t

(°C)

Ref H

igh

pre

ss.

(Bar(g

))

Ref C

on

d M

id

po

int (°C

)

Ref E

xp

. Valv

e in

(°C)

Su

b c

oo

l tota

l (K

)

Ref C

om

p o

ut

(°C)

Pre

ss. R

atio

Co

mp

. Isen

. eff*

Po

wer in

pu

t C

om

p. (k

W)

CO

P C

oo

l

Cap

. Co

ol (k

W)

CO

P H

eat

Cap

. Heat (k

W)

Am

ps L

1 (A

)

Am

ps L

2 (A

)

Am

ps L

3 (A

)

Po

wer F

acto

r

Vo

lt L1 (V

)

Vo

lt L2 (V

)

Vo

lt L3 (V

)

Po

wer in

pu

t

Co

mp

. 2 (k

W)

An

nu

al o

pera

ting

ho

urs

Co

olin

g (h

)

Data

Snapshot 9.4 7.5 2.04 1.1 7.0 5.9 11.5 35.1 8.12 36.1 27.7 8.4 54.1 3.00 72.6 61.8 4.77 294.7 5.70 352.1 91.38 90.84 95.10 0.93 239.40 239.30 241.90 1.4 2557

Minimum 7.2 6.7 1.83 -0.8 2.0 -0.0 1.6 0.3 2.20 2.6 4.4 -1.8 13.0 0.99 -22.9 0.0 -548.1 0.0 -547.2 0.0 1.38 1.32 1.38 -0.09 234.60 234.40 237.10 1.3 -293

Maximum 10.1 8.8 2.98 8.8 16.7 9.4 13.5 35.6 9.01 39.5 28.8 13.7 55.3 3.32 93.7 65.9 602.3 314.0 603.2 370.2 97.20 95.88 100.86 0.93 247.10 247.10 248.90 1.9 31317

Average 9.0 7.4 2.14 2.0 8.0 6.0 7.7 26.5 6.41 28.0 19.8 8.2 43.8 2.38 67.6 40.8 14.3 238.0 15.2 275.9 61.24 61.16 64.65 0.82 239.60 239.43 241.89 1.4 2848

Comments: - The system is found to be operating with the correct refrigerant charge as the subcooling and superheat suggests. - Condensing temperature is higher than expected as ideal is 15K above ambient (24.6K in this case). Condenser performance lower than expected.

- Evaporator temperature found to be acceptable. Approach temperature (i.e. Evap. In – Evap. Temp.) is 6.4K. - Compressor still operating with a good efficiency of 72.6% and a good COP of 4.77. - It is noted that compressor A was duty compressor all day with no running hours for compressor B.

Page | 9

PERFORMANCE ANALYSIS: 6th

March 2015

SecC

Evap

in

(°C)

SecC

Evap

ou

t (°C

)

Ref L

ow

pre

ss.

(Bar(g

))

Ref E

vap

Mid

po

int

(°C)

Ref C

om

p in

(°C)

Su

per h

eat (K

)

SecW

Co

nd

in

(°C)

SecW

Co

nd

ou

t

(°C)

Ref H

igh

pre

ss.

(Bar(g

))

Ref C

on

d M

id

po

int (°C

)

Ref E

xp

. Valv

e in

(°C

)

Su

b c

oo

l tota

l

(K)

Ref C

om

p o

ut

(°C)

Pre

ss. R

atio

Co

mp

. Isen

. eff*

Po

wer in

pu

t C

om

p. (k

W)

CO

P C

oo

l

Cap

. Co

ol (k

W)

CO

P H

eat

Cap

. Heat (k

W)

Am

ps L

1 (A

)

Am

ps L

2 (A

)

Am

ps L

3 (A

)

Po

wer F

acto

r

Vo

lt L1 (V

)

Vo

lt L2 (V

)

Vo

lt L3 (V

)

Po

wer in

pu

t C

om

p. 2

(kW

)

An

nu

al o

pera

ting

ho

urs

Co

olin

g (h

)

Data

Snapshot 9.6 7.1 2.19 2.5 8.1 5.6 11.8 23.9 5.67 25.2 18.5 6.7 38.3 2.08 76.1 22.0 8.12 178.6 9.05 199.0 34.38 34.98 37.74 0.85 242.90 242.90 245.10 1.4 3689

Minimum 8.1 8.0 2.91 8.4 14.9 6.2 8.6 7.8 2.90 8.3 9.3 -1.0 16.3 1.00 -12.9 0.0 85.1 0.0 86.1 0.0 1.38 1.38 1.44 -0.07 243.20 243.20 245.30 1.4 -79

Maximum 10.0 8.6 2.96 8.7 15.7 7.3 8.8 8.0 2.94 8.6 9.3 -0.7 17.2 1.00 -3.4 0.0 315.0 0.0 315.9 0.0 1.38 1.38 1.50 -0.03 244.20 244.20 246.20 1.4 204

Average 9.0 8.4 2.93 8.5 15.3 6.7 8.7 7.9 2.92 8.4 9.3 -0.9 16.8 1.00 -6.2 0.0 158.1 0.0 159.0 0.0 1.38 1.38 1.47 -0.05 243.55 243.60 245.68 1.4 66

Comments: - The system is found to be operating with the correct refrigerant charge as the subcooling and superheat suggests. - Condensing temperature is well within expectation as ideal is 15K above ambient (13.4K in this case). Condenser performance is good in this case.

- Evaporator temperature found to be good. Approach temperature (i.e. Evap. In – Evap. Temp.) is 4.6K. - Compressor still operating with a good efficiency of 76.1% and a good COP of 8.12. - Compressor was running at very low load at this time (Turbocor compressor is optimised for part load operation). - It is noted that compressor A was duty compressor all day with no running hours for compressor B.

Page | 10

PERFORMANCE ANALYSIS: 7th

March 2015

SecC

Ev

ap

in (°C

)

SecC

Ev

ap

ou

t (°C)

Ref L

ow

pre

ss.

(Bar(g

))

Ref E

va

p M

idp

oin

t

(°C)

Ref C

om

p in

(°C)

Su

per h

eat (K

)

Sec

W C

on

d in

(°C)

Sec

W C

on

d o

ut (°C

)

Ref H

igh

pre

ss

. (Bar(g

))

Ref C

on

d M

id p

oin

t

(°C)

Ref E

xp

. Va

lve in

(°C)

Su

b c

oo

l tota

l (K)

Ref C

om

p o

ut (°C

)

Pre

ss. R

atio

Co

mp

. Ise

n. e

ff*

Po

wer in

pu

t Co

mp

.

(kW

)

CO

P C

oo

l

Cap

. Co

ol (k

W)

CO

P H

eat

Cap

. He

at (k

W)

Am

ps L

1 (A

)

Am

ps L

2 (A

)

Am

ps L

3 (A

)

Po

wer F

acto

r

Vo

lt L1 (V

)

Vo

lt L2 (V

)

Vo

lt L3 (V

)

Po

wer in

pu

t Co

mp

. 2

(kW

)

An

nu

al o

pera

ting

ho

urs

Co

olin

g (h

)

Data

Snapshot 9.1 7.3 2.01 0.9 6.8 5.9 20.8 38.5 9.37 40.8 34.4 6.4 59.4 3.43 74.0 70.8 4.06 287.4 4.99 353.2 105.36 105.00 108.78 0.93 237.90 237.90 240.00 1.6 2472

Minimum 8.1 6.7 1.42 -5.0 0.7 -0.0 8.1 8.3 3.03 9.3 9.7 -2.5 18.3 1.02 -2203.3 0.0 -544.9 -1085.2 -544.0 -1063.6 1.38 1.32 1.38 -0.43 235.20 234.80 237.80 1.2 -17447

Maximum 10.1 10.1 3.21 10.5 28.1 18.1 21.0 38.9 9.37 40.8 34.5 11.1 60.2 3.47 6996.6 70.8 1980.6 399.2 1981.5 419.8 105.36 105.00 108.78 0.93 245.80 245.60 247.60 1.9 35109

Average 8.8 7.5 2.19 2.4 9.0 6.6 11.7 27.9 6.65 29.3 22.1 7.2 45.0 2.44 73.1 37.3 11.6 207.3 12.5 242.0 56.57 56.42 59.52 0.78 240.35 240.25 242.49 1.4 3175

- The system is found to be operating with the correct refrigerant charge as the subcooling and superheat suggests. - Condensing temperature is higher than expected as ideal is 15K above ambient (20K in this case). Condenser performance lower than expected.

- Evaporator temperature found to be acceptable. Approach temperature (i.e. Evap. In – Evap. Temp.) is 6.4K. - Compressor still operating with a good efficiency of 74.0% and a good COP of 4.06. - It is noted that compressor A was duty compressor all day with no running hours for compressor B.

Page | 11

Conclusions and Recommendations From the above, it can be clearly seen there are some significant opportunities to reduce the energy consumption and well being of this machine. The symptoms we have identified may also apply to circuit B, but this can only be verified once circuit B has been properly enabled. All chillers should implement a lead/lag control strategy but this has not been properly enabled in your machine. This will even out the wear on the compressors and other system components. We strongly recommend that this is implemented at the earliest opportunity. Your contractors should be able to do so, but if you require any assistance in this regard, we can provide this for you. However, we have no desire to come between the relationship that you have with your contractor. It is also clear that there are opportunities to save energy where the settings of the condenser head pressure/low ambient control are concerned. Should it be found that this does require adjustment and that the problem is not related to refrigerant charge, the same is likely to apply to circuit B when this is operational. Equally, if refrigerant overcharge is responsible for the poor efficiency of the condenser and the system as a whole, excess refrigerant charge might also be found in circuit B. In conclusion then, circuit B should be enabled and following this, proper identification of the poor condenser performance can then be determined, adjusting either controls, refrigerant charge or both. From this point onward, the reduction in energy consumption can be quickly ascertained, so as to start the power consumption metering running in order to trigger the final payback period for the cost of the installation. The longer this is delayed, the more that XXX and Business Edge are losing in the ClimaCheck installation investment. Accordingly, we urge you to trigger action with your FM/AC contractor at the earliest opportunity. END