| 摘要: |
| 本文提出了利用电动压缩式大温差供热机组与大温差长距离供热技术相结合的“零碳供热”模式，其适应了电网与热网的运行特性，将两者有机的联系起来，实现了以“绿色电力”为主的供电模式和以零碳的工业余热为主的供热模式，因此成为“热电协同”的关键设备。经过本文论证并且经济性可以达到热电联产相当的水平，可以大幅降低长输网回水温度从而增加热网的输送能力；而且其回水温度可以很低，结构紧凑，工况限制和空间限制更少。为验证这一技术路线的可行性，本文对实际应用于运城市的0.5 MW机组在2020—2022年度两个供热季的运行性能进行了实测与分析。测试结果表明：机组在0~100%运行负荷范围内均能稳定高效运行；仅计算电动压缩式热泵部分的性能时，最小供热COP为6.5，最高供热COP为13.1，全年运行平均供热COP为8.3。热网一次网回水温度最低可以降至比二次网回水温度低33 K，最低回水温度可达15 ℃；相对燃气锅炉投资回收期为4年。 |
| 关键词: 零碳供热 热电协同 电动压缩式热泵 大温差长距离输送供热 COP |
| DOI： |
| Received:May 29, 2022Revised:November 12, 2022 |
| 基金项目:国家自然科学基金（51876135）资助项目。 |
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| Design Measurement and Analysis of Vapor Compression Heat Pump with Large Temperature Difference |
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Miao Qing1, Li Minxia1, Ma Yitai1, Dang Chaobin2, Wang Qifan1, Zhang Shigang3
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| (1.Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, MOE, Thermal Energy Research Institute, Tianjin University;2.University of Fukui;3.Beijing Qingjian Energy Technology Co., LTD.) |
| Abstract: |
| This paper proposes a ''zero-carbon heating'' model that uses the technology of an electric-driven vapor compression heat pump unit with a large temperature difference that can be used for long-distance delivery of heating. The model adapts to the operational characteristics of the power grid and the heating network, which facilitates 'power supply using 'green electricity'' and heat supply mainly with zero-carbon industrial waste heat. Hence, it is the key equipment that features the synergy of heat and power. The studied system was equally cost-effective to the conventional cogeneration system since it can significantly reduce the backwater temperature of the long-distance transmission network and increase the transmission capacity of the heat network; the return water temperature can be very low. The model has a compact structure; therefore, it can adapt to complex working conditions and land requirements. To verify the feasibility of this technical approach, the operating performance of 0.5 MW units used in Yuncheng in two heating seasons from 2020–2022 was measured and analyzed. The test results showed that the unit can operate stably and efficiently within a range of 0–100% operating load. When only the performance of the electric-driven vapor compression heat pump was calculated, the minimum and maximum heating COP were 6.5 and 13.1, respectively, while the annual average heating COP was 8.3. The minimum return water temperature of the primary network can be 33 K lower than that of the secondary network, reaching 15 ℃. When compared with gas-boilers as the baseline, the payback period was four years. |
| Key words: zero-carbon heating synergy of heat and power electric-driven vapor compression heat pump long-distance heating with large temperature difference COP |
