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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Total heat recovery of gas boiler by absorption heat pump and direct-contact heat exchanger
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Total heat recovery of gas boiler by absorption heat pump and direct-contact heat exchanger

机译：吸收式热泵和直接接触式换热器对燃气锅炉进行全热回收

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This paper presents a new technology which combines the absorption heat pump and the direct-contact heat exchanger. Based on the analysis of natural gas features and thermal efficiency of the gas boilers, it analyzes existing and new techniques for heat recovery, focusing upon removing heat from the flue gas to a point where it can be below the dew point as significant to realizing the total heat recovery for the gas boiler. Through field test and experimental analysis of an actual case in a district heating system operating at various system load, this paper strives to identify challenges related to high return water temperature, achieving a low-temperature cold source, and enhancing the heat transfer effect; while observing if the system performance is satisfactory, and whether the system can achieve very stable performance under different working conditions and realize the total design heat capacity improvement of 12%. Data will be examined for boiler load and its influences on the condensing rate with suggestions for further improvements.
机译：本文提出了一种结合吸收式热泵和直接接触式换热器的新技术。在分析天然气锅炉的天然气特性和热效率的基础上，它分析了现有和新的热回收技术，重点是从烟道气中去除热量至可能低于露点的温度，这对于实现烟气回收非常重要。燃气锅炉的总热量回收。通过对在不同系统负载下运行的区域供热系统的实际案例进行现场测试和实验分析，本文力图确定与高回水温度，实现低温冷源以及增强传热效果有关的挑战;同时观察系统性能是否令人满意，以及系统在不同工作条件下能否达到非常稳定的性能，并实现整体设计热容量提高12％。将检查数据中的锅炉负荷及其对冷凝率的影响，并提出进一步改进的建议。

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