冷热水联供机组性能实验研究

建立了燃气内燃机驱动的冷热水联供系统，测量了空调名义工况条件下机组的制冷和供热性能，并实验研究了内燃机的转速对机组制冷和供热的影响特性。实验结果表明系统在空调名义工况条件下的制冷量467．1kW，供热量为148．7kW，一次能源利用率达1．9，与常规电制冷＋锅炉供热相比能源节约率达37．8％。在实验测试的内燃机转速范围内制冷系统的制冷量和余热回收供热量随内燃机转速的降低而降低，但制冷系统和冷热水联供系统能源利用率均随内燃机转速的降低而升高，表明机组在部分负荷运行时，应优先调节内燃机的转速，从而确保系统具有较高的能源利用率。该联供系统有效回收利用了内燃机的余热，提高了能源利用率，商业化前景较好。

Experimental Investigation on Combined Cold and Heat Unit

A combined cold and heat system driven by a gas engine was set up, The performance of cooling and heating was tested under the nominal conditions of air conditioning. The results show that the cooling heating capacity was 476. 1 kW and 148.7 kW, respectively. Primary energy rate was about 1.9 and energy saving ratio is 37.8%, compared with the conventional cooling and heating system. The effect of the gas engine speed on cooling and heating capacity was also tested. Cooling and heating capacity of the combined system decreased with the decrease of the gas engine speed, but primary energy rate increased with the decrease of the gas engine speed. It may be suggested that the speed of the gas engine be prior to all control parameters under part - load conditions to ensure higher primary energy rate of the system.