Operation test and simulation optimization of multiple chiller systems
In order to study the effect of different chillers collocation on the energy efficiency of refrigeration,taking the refrigeration room system of a public building as the research object,TRNSYS is used to build a model to simulate the optimal control strategy of different chillers in view of the problems existing in operation,and analyzes the benefits of energy saving and emission reduction.The results show that for the combined operation of multiple chiller units,compared with the original operation mode,the total energy consumption of the three group control strategies from largest to smallest is as follows:sequential startup control is greater than even load sharing control and greater than COP optimization allocation control.Compared with the start-by-start control strategy,the energy consumption of cold station system and chiller unit decreased by 3.4％and 1.7％respectively.By adopting COP optimal distribution control strategy,the energy consumption of cold station system decreased by 5.7％and that of chiller by 2％.Finally,when the COP optimization distribution control strategy is adopted,the COP of the cooler and the EER of the system are 6.66 and 4.81,the energy saving rate is 5.6％,respectively,and the corresponding environmental pollutants are reduced by 110.61 t,the environmental benefit value is 26,062.1 yuan.When multiple chiller units operate jointly,it is recommended to adopt the COP optimization distribution control strategy based on the efficient operation range of the units,which will have a better energy-saving effect.
万方数据
维普
