Energy Efficiency Analysis of a Chiller Using Variable Chilled Water and Cooling Water Flow Control
Mathematical models of a chiller and a cooling tower were built to simulate the performances of the chiller operated on part load conditions. The energy efficiencies of the water chiller operated in four flow control modes, namely, (1) constant water flow mode, (2) variable chilled water flow mode, (3) variable chilled water and cooling water flow mode, (4) combined water flow and cooling tower fan control mode, were simulated respectively and comparatively analyzed. Results show that the variable chilled water and cooling water flow control mode obtains the biggest energy-saving potential on various part load ratio (PLR) conditions. Compared to constant water flow mode, energy consumption of the chiller could be reduced by 23.3％, when operated with PLR at 50％. Also, simulative results show that reducing the air flow rate of cooling tower on part load conditions was unreasonable, as much more energy was consumed by the compressor than the decrease of energy consumption of the fan.
Chiller Variable water flow Energy efficiency Control optimization
Xiantai Wen Caihua Liang Xiaosong Zhang Guoxing Xu
School of Energy and Environment,Southeast University,Nanjing,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
222-229
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）