基于压缩式换热的中深层地热集中供热系统效益分析

doi:10.3969/j.issn.2097-0706.2023.04.010

综合智慧能源 ›› 2023, Vol. 45 ›› Issue (4): 69-73.doi: 10.3969/j.issn.2097-0706.2023.04.010

基于压缩式换热的中深层地热集中供热系统效益分析

孙方田^a^,^b(), 赵晓晴^a, 许婉晴^a, 郝宝如^a, 谢永华^a

a.北京建筑大学北京市建筑能源高效综合利用工程技术研究中心，北京 100044
b.北京建筑大学国家级建筑用能虚拟仿真实验教学示范中心，北京 100044

收稿日期:2022-07-01 修回日期:2023-01-04 接受日期:2023-04-25 出版日期:2023-04-25 发布日期:2023-05-06
作者简介:孙方田（1977），男，副教授，博士，从事低碳区域供热供冷技术研究及关键设备研究，sunfangtian@bucea.edu.cn。
基金资助:
北京市自然科学基金(3222027)

Benefit analysis on the deep geothermal energy centralized heating system based on compression heat exchangers

SUN Fangtian^a^,^b(), ZHAO Xiaoqing^a, XU Wanqing^a, HAO Baoru^a, XIE Yonghua^a

a. Beijing Engineering Research Centre of Sustainable Energy and Buildings，Beijing 100044，China；
b. Natural Virtual Simulation Experimental Teaching Center of Energy and Buildings，Beijing University of Civil Engineering and Architecture，Beijing 100044，China

Received:2022-07-01 Revised:2023-01-04 Accepted:2023-04-25 Online:2023-04-25 Published:2023-05-06
Supported by:
Natural Science Foundation of Beijing(3222027)

摘要/Abstract

摘要：

鉴于北方地区清洁供热发展需求，结合北方地区中深层地热分布特点提出一种基于压缩式换热的中深层地热集中供热模式，并分析了不同地热水温度对系统性能的影响。结果表明，地热水温度越高，系统热力性能越好。当地热水温度为75.0 ℃时，压缩式换热机组可将一次网回水温度降低至15.0 ℃，以解决中深层地热田与热用户空间分布不匹配的问题。在一次网输热距离为20 km的条件下，基于压缩式换热的中深层地热集中供热系统的系统年性能系数（ASCOP）约为12.5，地热能供热占比约92%，节能减排潜力较大。

关键词: 清洁供热, 地热能, 中深层地热, 集中供热, 压缩式换热, 长距离输热, 节能减排

Abstract:

According to the demand for clean heating in northern China， a deep geothermal energy centralized heating system based on compression heat exchangers is proposed considering the distribution of deep geothermal energy in this area. The effect of geothermal water temperature on the performance of the proposed heating system is analyzed，and the result indicates that higher geothermal water temperature can improve the thermal performance of the system. When temperature of geothermal water goes up to 75 ℃， the compression heat exchanger can lower the return water temperature of the primary network to 15 ℃， which solves the space mismatch between geothermal fields and end-users. When heat transmission distance of the primary network is 20 km， the annual system coefficient of performance （ASCOP） of the deep geothermal energy centralized heating system based on compression heat exchangers is about 12.5， and 92.0% geothermal energy is utilized for heat-supply. Thus， the proposed heating mode is characterized by larger potential of energy-saving.

Key words: clean heating, geothermal energy, deep geothermal energy, centralized heating, long-distance heat transmission, energy saving and emission reduction

中图分类号:

TK529：TU833.1

孙方田, 赵晓晴, 许婉晴, 郝宝如, 谢永华. 基于压缩式换热的中深层地热集中供热系统效益分析[J]. 综合智慧能源, 2023, 45(4): 69-73.

SUN Fangtian, ZHAO Xiaoqing, XU Wanqing, HAO Baoru, XIE Yonghua. Benefit analysis on the deep geothermal energy centralized heating system based on compression heat exchangers[J]. Integrated Intelligent Energy, 2023, 45(4): 69-73.

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类型	项目	地热水温度/℃
类型	项目	55.0	60.0	65.0	70.0	75.0
热源站	水-水换热器功率/MW	165	170	175	180	185
热源站	地热水流量/（kg·s^-1）	2 017.92	1 594.06	1 428.02	1 422.06	1 448.77
一次管网	供水温度/℃	50.0	55.0	60.0	65.0	70.0
	回水温度/℃	15.0	15.0	15.0	15.0	15.0
	供水流量/（kg·s^-1）	1 121.66	989.62	928.86	852.53	790.25
热力站	压缩式热泵COP	3.7	4.0	4.3	4.6	4.8
热力站	压缩式换热机组功率/MW	200	200	200	200	200

地热温度/℃	减排量/t
地热温度/℃	烟尘	SO₂	NO_x	CO₂
55.0	8.68	3.62	22.80	75 443.23
60.0	8.86	3.69	23.26	76 991.91
65.0	9.60	4.00	25.21	83 430.58
70.0	9.66	4.03	25.37	83 954.64
75.0	10.74	4.48	28.20	93 339.45

基于压缩式换热的中深层地热集中供热系统效益分析

Benefit analysis on the deep geothermal energy centralized heating system based on compression heat exchangers

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