燃料驱动无电热泵系统的节能模拟与运行经济性分析

Energy saving simulation and operation economic analysis of fuel driven non-electric heat pump systems

创新性提出了一种燃料驱动无电热泵系统(NEHP)的热泵新技术,NEHP使用一套系统解决了夏季供冷、冬季供暖、生活热水及一定量生活用电,是一种可冷热电多联供的分布式能源系统。本文从原理及设计思路上对NEHP新技术进行了具体说明,对NEHP技术应用的节能性进行了模拟计算,并对运行经济性作了全面分析。NEHP技术适宜应用于缺电和无电地区,具有电热泵(EHP)无法比拟的适用性优势,也适用于燃气与电力均较为充裕的地区,具有广阔的应用场景。对于使用燃气的NEHP-G系统,若气电比rge小于某一数值,则在供热或供冷方面NEHP-G将比EHP具有更低的运行费用,其中额定制热时该值为4.17,额定制冷回收与不回收余热时该值分别为5.62和3.06。以重庆地区2021年商业气价与电价为例,NEHP-G在制热季可节省费用42.17%~47.49%,在制冷季回收与不回收余热可分别节省费用48.22%与32.26%。

A new heat pump technology for fuel driven non-electric heat pump system(NEHP) was proposed.NEHP uses one system to meet the demand for cooling in summer,heating in winter,providing domestic hot water throughout the whole year,and supplying a certain amount of domestic electricity as necessary.It is a distributed energy system that can combine cooling,heating and power(CCHP).In this paper,a novel technology of NEHP was described in detail based on the principle and design idea.The energy saving performance of the NEHP technology application was simulated and calculated,and the operation economic analysis was comprehensively analyzed.NEHP technology was suitable for use in areas lacking or without electricity,which had the incomparable applicability advantages compared with electric heat pumps(EHP).It can be used in areas where both gas and electricity were abundant as well,and had a wide range of application scenarios.For the NEHP-G system by using natural gas,it will have lower operating costs than that of EHP in the modes of heating or cooling if the ratio of natural gas price to electricity price(rge) was less than a fixed value.The fixed values of rge were 4.17 at rated heating mode,5.62 at rated cooling mode with waste heat recovery,and 3.06 at rated cooling mode without waste heat recovery,respectively.Taking the prices of commercial gas and electricity in Chongqing in 2021 as an example,compared with EHP,the operating cost of NEHP-G can save 42.17%—47.49% in the heating season,48.22% in the cooling season with waste heat recovery,and 32.26% in the cooling season without waste heat recovery,respectively.The cost saving of NEHP-G was significant,and it had huge market application potential.