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Hi,

I have created vfd compressor Electric chiller using manufacturer data, but when running the simulation i notice the electric consumption is not what i spec.

Data used for coefficient are:

DATA L/s Cap kW Elect kW 0.0072 105000 28970 0.0098 209300 59570 0.0148 313900 84300 0.0197 418500 116400 0.0246 523100 153800 Data at 7C leaving water and 35C outdoor temp

LWT OT C C Cap kW Eelct kW 12 5 741900 102700 10 5 754300 111300 9 5 729400 109100 7 5 680600 105000 15 10 808900 119200 12 10 779200 122000 10 10 729400 117200 9 10 705100 114900 7 10 658400 110500 15 15 827700 137200 12 15 751700 129200 10 15 703000 124100 9 15 679600 121700 7 15 634300 117100 15 25 755300 153300 12 25 688100 145600 10 25 645100 140800 9 25 624100 138500 7 25 582600 133800 15 35 678700 173300 12 35 617900 165700 10 35 579000 160800 9 35 560000 158400 7 35 523100 153800 Data at 0.0246 m3/s

Using EP tools, coefficient can be calculated, the problem is the COP in the simulation should increase when temperature and capacity decrease but the simulation show opposite.

Outdoor temp red, COP green, electrical consumption blue.

Maybe i'm choosing data for coefficient calculation wrong, can somebody give to me some advice's , whats i'm doing wrong?

Hi,

I have created vfd compressor Electric chiller using manufacturer data, data for typical office building application, but when running the simulation i notice the electric consumption is not what i spec.

Rated conditions is: 7C Leaving water temp, 0.0246 M3/s water flowrate and 35C outdoor temp.

Data used for coefficient are:

DATA L/s Cap kW Elect kW 0.0072 105000 28970 0.0098 209300 59570 0.0148 313900 84300 0.0197 418500 116400 0.0246 523100 153800 Data at 7C leaving water and 35C outdoor temp

LWT OT C C Cap kW Eelct kW 12 5 741900 102700 10 5 754300 111300 9 5 729400 109100 7 5 680600 105000 15 10 808900 119200 12 10 779200 122000 10 10 729400 117200 9 10 705100 114900 7 10 658400 110500 15 15 827700 137200 12 15 751700 129200 10 15 703000 124100 9 15 679600 121700 7 15 634300 117100 15 25 755300 153300 12 25 688100 145600 10 25 645100 140800 9 25 624100 138500 7 25 582600 133800 15 35 678700 173300 12 35 617900 165700 10 35 579000 160800 9 35 560000 158400 7 35 523100 153800

Data at 0.0246 m3/s

Using EP tools, coefficient can be calculated, the problem is the COP in the simulation should increase when temperature and capacity decrease but the simulation show opposite.

Outdoor temp red, COP green, electrical consumption blue.

Maybe i'm choosing data for coefficient calculation wrong, can somebody give to me some advice's , whats i'm doing wrong?

Hi,

I have created vfd compressor Electric chiller using manufacturer data for typical office building application, but when running the simulation i notice the electric consumption is not what i spec.

Rated conditions is: 7C Leaving water temp, 0.0246 M3/s water flowrate and 35C outdoor temp.

Data used for coefficient are:

Data at 7C leaving water and 35C outdoor temp

Data at 0.0246 m3/s

Using EP tools, coefficient can be calculated, the problem is the COP in the simulation should increase when temperature and capacity decrease but the simulation show opposite.

Outdoor temp red, COP green, electrical consumption blue.

Maybe i'm choosing data for coefficient calculation wrong, can somebody give to me some advice's , whats i'm doing wrong?

Hi,

I have created vfd compressor Electric chiller using manufacturer data for typical office building application, but when running the simulation i notice the electric consumption is not what i spec.

Rated conditions is: 7C Leaving water temp, 0.0246 M3/s water flowrate and 35C outdoor temp.

Data used for coefficient are:

Data at 7C leaving water and 35C outdoor temp

Data at 0.0246 m3/s

Using EP tools, coefficient can be calculated, the problem is the COP in the simulation should increase when temperature and capacity decrease but the simulation show opposite.

Outdoor temp red, COP green, electrical consumption blue.

Maybe i'm choosing data for coefficient calculation wrong, can somebody give to me some advice's , whats i'm doing wrong?