2) The full-load and part-load characteristics of two water-cooled chillers, A and B, are given in the following table:

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2 The Full Load And Part Load Characteristics Of Two Water Cooled Chillers A And B Are Given In The Following Table 1 (96.08 KiB) Viewed 44 times

2) The full-load and part-load characteristics of two water-cooled chillers, A and B, are given in the following table: Chiller A Chiller B Rated cooling capacity, Qfull 3160 kW 3250 kW Full-load power input 0.177 kW/kW cooling 0.178 kW/kW cooling Part-load coefficients: a, b, and c 0.092, 0.804, 0.098 0.204, 0.626, 0.165 The part-load coefficients, a, b and c, define the change of the power input with the chiller part-load ratio (PLR) by the following expression: W Qran [a+b(PLR)+c (PLR)?] COP full a) Plot the COP of the chillers as a function of PLR. Comment on the part-load characteristics of the chillers and which chiller is likely to use less energy during a cooling season. (12 marks) b) Calculate the design mass flowrate of the cooling water to remove the heat rejected by Chiller A if the cooling water enters the chiller at 32 °C and leaves at 37 °C. (4 marks)