关于新型喷射-吸收式热变换器性能的分析

Analysis of the Performance of a Novel Jet-absorption Type Heat Convertor

针对传统热变换器系统温升低,提出一种含有两个发生器的新型喷射-吸收式热变换器系统。与传统的热变换器相比,该新型系统引入了一个低压发生器和喷射器:来自蒸发器的高压冷剂蒸汽驱动喷射器,低压发生器经喷射器的引射维持低压,整个系统中溴化锂溶液低压降低了,系统浓度差增大。对该新型热力模型进行分析,结果显示:系统热泵温升从传统热变换器的17.6℃变为25℃,提高了热品质。

In the light of the low temperature rise in the traditional heat convertor systems,proposed was a new type jet-absorption heat convertor system with two generators. Compared with the traditional heat convertors,a low pressure generator and jet ejector was introduced into the system in question: the jet ejector was driven by the high-pressure refrigerant vapor from the evaporator and the low pressure in the low pressure generator was maintained by the jet ejector,thus leading to a drop of the pressure of the lithium bromide solution in the whole system and a rise of the concentration difference in the system. An analysis of the thermal model for the system under discussion shows that thetemperature rise of the heat pump in the system increases from the temperature rise of 17. 6 ℃ in the traditionalheat convertor to 25 ℃,therefore,enhancing the heat quality