华电技术 ›› 2020, Vol. 42 ›› Issue (11): 83-90.

• 城镇区域供热 • 上一篇    下一篇

燃气清洁供热能耗减少技术路径探讨

  

  1. 北京优奈特燃气工程技术有限公司,北京 100023
  • 出版日期:2020-11-25 发布日期:2020-12-07

Discussion on the technical route of energy consumption reduction in clean gas-fired heating

  1. Beijing United Gas Engineering & Technology Company Limited,Beijing 100023,China
  • Online:2020-11-25 Published:2020-12-07

摘要: 提升燃气大规模清洁供热时燃气供热的能效,不仅体现了节能减排,而且节约了运行成本,具有较好的社 会与经济效益。以北京某锅炉房为例,以当地天然气价为标准,分析了燃气溴化锂/氨水吸收式热泵吸收式和水蒸 气泵(PAVE)系统的运行效果和适用性。结果显示,燃气溴化锂吸收式热泵装机按锅炉负荷的 60% 设计时的经济 性较好,但对于总容量≤28 MW 的燃气锅炉房不推荐燃气溴化锂吸收式热泵。为提高项目经济性,中小型燃气锅炉 房推荐使用燃气锅炉+小型燃气氨水吸收式热泵/PAVE 系统联合运营的方式。在实际工程中,需要根据燃气锅炉 房的规模选用不同的技术路线,同时要结合当地气候条件及燃气价格确定热泵的合理装机,保证项目经济性。方 案还指出了小型燃气氨水吸收式热泵/PAVE 系统的优化路径。

关键词: 燃气氨水吸收式热泵, 燃气溴化锂吸收式热泵, 间接式换热, 直接式换热, PAVE 系统

Abstract: Improving the energy efficiency of natural gas in large scale clean heating,is not only significant for energy
conservation and emission reduction,but also of good social and economic benefits. Taking practical cases in Beijing as an
example,the feasibility and adaptability of gas-fired lithium bromide/ammonia-water absorption heat pumps and PAVE
systems are analyzed based on local natural gas price. The results show that gas-fired lithium bromide absorption heat
pumps are economic with an installation capacity at 60% boiler load,but it is not recommended for the gas-fired boiler
plant with a total capacity ≤28 MW. In order to improve the project economy,small and medium-sized gas-fired boiler
plants are recommended to take the joint operation with gas-fired boilers + small gas-fired ammonia-water absorption heat
pumps/PAVE system. In the practical cases,different technical routes should be selected according to the scale of gas-fired
boiler plants,installation capacity of the heat pump,local climate conditions and gas prices,so as to ensure the project
economy. The optimized route for gas-fired ammonia-water absorption heat pump/PAVE system is also pointed out.

Key words: gas-fired ammonia-water absorption heat pump, gas-fired lithium bromide absorption heat pump, indirect heat exchange, direct heat exchange, PAVE system