Simulation of the effect of fan cooling tower variations on the performance and energy consumption of water cooled chiller with R-514a as refrigerant.

This paper analyzes the performance of a water cooled chiller at various number of fan cooling tower under the constant cooling capacity. The nominal capacity of the water cooled chiller unit is 800.0 ton and the refrigerant is R-514A. The performance of the water cooled chiller system when using 6 fans with a COP of8.29 and a kW/TR value not exceeding the minimum value set under the ASHRAE standard of0.42. The largest energy consumption is generated when the system uses 3 fans which is 2513.58 kWh during the period of time the system is turned on (7 hours). While the lowest energy consumption is generated when the system uses 6 fans which is 2036.78 kWh during the period of time the system is turned on (7 hours). The percentage of energy consumption increase when using 6 fans to 5 fans by 12,78%, from 5 fans to 4 fans by 7.48 % and from 4 fans to 3 fans by I,79%. Based on the results of analysis of the use of fan cooling tower variations on the performance and energy consumption of water cooled chiller is best when using 6 fans. [ABSTRACT FROM AUTHOR]