Power consumption of Chiller

[Segei]

Thank for replying.

for (4) why higher water temperature will result highter suction pressure?

for (5) Why part-load is inefficienct compare with full load for a single chiller?

Besides those five points. Do you have any suggestion in improving a chiller plant system to have significant savings?

Thank you

Assume that water flow is constant. Compressor is designed for certain ref. load or certain temp. difference. For example. Design temp. difference is 5degC. If water 2degC, suction temp. will be 7degC. If water is 5degC, suction temp. will be 10degC.
About part-load.
Full load. Compressor 100TR(ton refrigeration) and 200HP(horse power). Water pump 10HP, condenser fan 20HP. Total power use 230HP. Efficiency 230/100=2.3HP/TR
50% load. Compressor 50TR, 120HP. Pump 10HP, fan 10HP. Total power 140HP. Efficiency 140/50=2.8HP/TR
Full load is more efficient than 50% load.