Simulation Research on Operation Effect of VAV Air-conditioning System with Variable Water Temperature Strategy

doi:10.16182/j.issn1004731x.joss.18-0568

Abstract

Abstract: Aiming at the problem of coordinated operation between VAV (variable air volume) and variable water temperature in central air conditioning system, a TRNSYS dynamic simulation model of air conditioning system with adjustable air supply and water supply temperature is established, and the accuracy of the model is proved by experiments. By controlling the terminal air volume to simulate the effect of variable water temperature operation on the air conditioning system under different load rates, the optimal water supply temperature of the air conditioning system under different load rates is obtained, and the variable water temperature operation strategy of the VAV air-conditioning system at different time periods is formulated, and compared with the constant water temperature operation conditions. The results show: compared with the constant water temperature mode, the variable water temperature mode of the VAV air-conditioning system can ensure the comfort of the room during the working period, and the overall energy consumption of the system can be saved by 5.88% in the whole simulation cycle.

Key words: chilled water, VAV system, variable water temperature, TRNSYS, energy consumption

CLC Number:

TU831.3

Meng Qinglong, Zhang Zhibo, Xiong Cheng. Simulation Research on Operation Effect of VAV Air-conditioning System with Variable Water Temperature Strategy[J]. Journal of System Simulation, 2019, 31(8): 1617-1626.

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