Off-Design Regulation Performance of Absorption Chiller Driven by Gas Engine Exhaust

For the distributed energy supply system based on internal combustion engine, the engine operation condition has great impact on the absorption chiller.A steady simulation model of double-effect absorption chiller driven by the exhaust of a power generation gas engine was developed and solved by "DMS-PSO+NM SA" compound method.Based on the experimental data of the exhaust parameters, the influence of solution mass flow on the system performance under different engine loads was studied.The simulation results show that, in the operation mode of fixed weak solution mass flow, the waste heat cooling system couldn't work normally because the circulation ratio gets too high with the engine load below 30%,.The COP and cooling capacity of the system could be improved obviously by decreasing solution cycle mass flow at lower engine load.For example, cooling capacity increased by 26.9%, at 40%, load.Furthermore, limited by the danger of solution crystallization, the solution cycle mass flow rate has a minimum limit at different engine loads.