Design of the integrated energy heating（cooling） system for a commercial and residential park and its economy analysis

doi:10.3969/j.issn.2097-0706.2023.12.003

Abstract

Abstract:

In the context of dual carbon， combining renewable energy with integrated energy systems is an important way to expand the current heating capacity and provide clean heating（cooling），so as to meet people's livelihood needs， and achieve building energy conservation and emission reduction simultaneously. Taking the comprehensive energy heating（cooling）project of a commercial and residential park in north China as the research object，this paper carries out project load analysis，regional resource analysis，and cold and heat source optimization analysis，and puts forward two comprehensive energy heating（cooling）schemes with "central heat network + renewable energy" concept. Scheme 1 removes air source heat pumps，adds an energy storage system and uses an electric boiler as heat source in extremely cold periods. The results of the comparative analysis on two installation schemes and operational economy show that the total expense including electricity bill and heat purchase cost in heating season of scheme 1 is 18.6% lower than that of scheme 2. And the installation capacity of refrigeration unit， electricity bill for cooling， and annually operational cost of scheme 1 are 30.8%， 35.4% and 20.8% lower than that of scheme 2， respectively. This analysis provides reference for the design and operation strategy optimization of integrated energy projects of the same type.

Key words: "dual carbon" goal, geothermal energy, soil source heat pump, heat storage, cold storage, operation optimization, renewable energy, integrated energy system, clean heating（cooling）

CLC Number:

TK01

LIU Yuanyuan, LIU Fangfang, JIA Tianxiang, HAN Zhao, SHANG Yongqiang, JIANG Shu. Design of the integrated energy heating（cooling） system for a commercial and residential park and its economy analysis[J]. Integrated Intelligent Energy, 2023, 45(12): 20-28.

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References 23

[1]	中国建筑能耗研究报告2020[J]. 建筑节能(中英文), 2021, 49(2):1-6.
	China building energy consumption annual report 2020[J]. Building Energy Efficiency, 2021, 49(2):1-6.
[2]	江亿. 我国建筑能耗趋势与节能重点[J]. 建设科技, 2006(7):10-13,15.
	JIANG Yi. The trend and important energy efficiency points in our country[J]. Construction Science and Technology, 2006(7):10-13,15.
[3]	方豪, 夏建军, 林波荣, 等. 北方城市清洁供暖现状和技术路线研究[J]. 区域供热, 2018(1):11-18.
	FANG Hao, XIA Jianjun, LIN Borong, et al. Study on the current situation and technical route of clean heating in northern cities[J]. District Heating, 2018(1):11-18.
[4]	龙惟定. 夏热冬冷地区住宅供暖问题刍议[J]. 暖通空调, 2013, 43(6):42-49.
	LONG Weiding. Comment on residential building heating in hot summer and cold winter zone[J]. Heating Ventilating & Air Conditioning, 2013, 43(6):42-49.
[5]	李丹, 张华玲. 南方供暖需求现状及技术分析[J]. 制冷与空调, 2013, 27(6):621-625.
	LI Dan, ZHANG Hualing. The demand status and technology analysis of southern heating[J]. Refrigeration & Air Conditioning, 2013, 27(6):621-625.
[6]	康艳兵, 张建国, 张扬. 我国热电联产集中供热的发展现状、问题与建议[J]. 中国能源, 2008, 30(10):8-13.
	KANG Yanbing, ZHANG Jianguo, ZHANG Yang. Study on current status, barriers and recommendations of China's CHP/DHC market development[J]. Energy of China, 2008, 30(10):8-13.
[7]	龙惟定, 梁浩. 我国城市建筑碳达峰与碳中和路径探讨[J]. 暖通空调, 2021, 51(4):1-17.
	LONG Weiding, LIANG Hao. Discussion on paths of carbon peak and carbon neutrality of urban buildings in China[J]. Heating Ventilating & Air Conditioning, 2021, 51(4):1-17.
[8]	刁乃仁, 方肇洪. 地源热泵——建筑节能新技术[J]. 建筑热能通风空调, 2004, 23(3):18-23.
	DIAO Nairen, FANG Zhaohong. Ground source heat pumps—A promising technology for energy conservation in buildings[J]. Building Energy & Environment, 2004, 23(3):18-23.
[9]	王沣浩, 王志华, 郑煜鑫, 等. 低温环境下空气源热泵的研究现状及展望[J]. 制冷学报, 2013, 34(5):47-54.
	WANG Fenghao, WANG Zhihua, ZHENG Yuxin, et al. Research progress and prospect of air source heat pump in low temperature environment[J]. Journal of Refrigeration, 2013, 34(5):47-54.
[10]	常世钧, 龚光彩. 冷热源及建筑节能的研究现状和进展[J]. 建筑热能通风空调, 2003, 22(5):18-23.
	CHANG Shijun, GONG Guangcai. Research situation on cool and heat source as well as building energy conservation[J]. Building Energy & Environment, 2003, 22(5):18-23.
[11]	EKREN O, EKREN B Y. Size optimization of a PV/wind hybrid energy conversion system with battery storage using simulated annealing[J]. Applied Energy, 2010, 87(2):592-598. doi: 10.1016/j.apenergy.2009.05.022
[12]	付文锋, 李嘉华, 王蓝婧, 等. 基于动态自适应粒子群算法的二次再热燃煤-捕碳机组热力系统优化设计[J]. 中国电机工程学报, 2017, 37(9):2652-2659.
	FU Wenfeng, LI Jiahua, WANG Lanjing, et al. Optimal design for thermodynamics system of double reheat coal-fired power plants with post-combustion carbon capture based on dynamic adaptive particle swarm optimization[J]. Proceedings of the CSEE, 2017, 37(9):2652-2660.
[13]	龙惟定. 绿色产业园区的需求侧能源规划[J]. 上海节能, 2016, 334(10):533-539.
	LONG Weiding. Demand side energy planning of green industry park[J]. Shanghai Energy Saving, 2016, 334(10):533-539.
[14]	顾伟, 陆帅, 王珺, 等. 多区域综合能源系统热网建模及系统运行优化[J]. 中国电机工程学报, 2017, 37(5):1305-1316.
	GU Wei, LU Shuai, WANG Jun, et al. Modeling of the heating network for multi-district integrated energy system and its operation optimization[J]. Proceedings of the CSEE, 2017, 37(5):1305-1316.
[15]	熊显智, 程晓绚, 李嘉丰, 等. 多能互补的综合能源供热系统工程设计及优化[J]. 全球能源互联网, 2021, 4(2):153-162.
	XIONG Xianzhi, CHENG Xiaoxuan, LI Jiafeng, et al. Engineering design and optimization of multi-energy heating systems[J]. Journal of Global Energy Interconnection, 2021, 4(2):153-162.
[16]	吴迪. 综合能源系统优化设计方法与运行特性研究[D]. 北京: 华北电力大学, 2021.
	WU Di. Research on optimization design method and operation performances of integrated energy system[D]. Beijing: North China Electric Power University, 2021.
[17]	郇嘉嘉, 赵瑾, 曾诚玉, 等. 园区综合能源系统规划及优化配置方案[J]. 现代电力, 2020, 37(3):303-309.
	HUAN Jiajia, ZHAO Jin, ZENG Chengyu, et al. Integrated energy system planning in parks and optimal allocation schemes[J]. Modern Electric Power, 2020, 37(3):303-309.
[18]	丁月清, 洪增林, 金光, 等. 关中地区清洁能源供暖综合效益评价——西安某商业建筑的案例实证[J]. 自然资源学报, 2020, 35(11):2759-2769. doi: 10.31497/zrzyxb.20201115
	DING Yueqing, HONG Zenglin, JIN Guang, et al. Calculation and evaluation of the comprehensive benefit ratio of clean energy utilization:Taking clean energy heating in guanzhong plain as an example[J]. Journal of Natural Resources, 2020, 35(11):2759-2769. doi: 10.31497/zrzyxb.20201115
[19]	刘自发, 谭雅之, 李炯, 等. 区域综合能源系统规划关键问题研究综述[J]. 综合智慧能源, 2022, 44(6):12-24. doi: 10.3969/j.issn.2097-0706.2022.06.002
	LIU Zifa, TAN Yazhi, LI Jiong, et al. Review on key points in the planning for a district-level integrated energy system[J]. Integrated Intelligent Energy, 2022, 44(6):12-24. doi: 10.3969/j.issn.2097-0706.2022.06.002
[20]	余莉, 徐静静, 马兰芳, 等. 综合能源服务项目新增热泵系统的案例分析[J]. 综合智慧能源, 2022, 44(1):72-79. doi: 10.3969/j.issn.2097-0706.2022.01.010
	YU Li, XU Jingjing, MA Lanfang, et al. Case study on the integrated energy service project with newly installed heat pumps[J]. Integrated Intelligent Energy, 2022, 44(1):72-79. doi: 10.3969/j.issn.2097-0706.2022.01.010
[21]	郭祚刚, 袁智勇, 徐敏, 等. 多能互补综合能源系统混合能流计算方法及算例[J]. 综合智慧能源, 2022, 44(7):58-65. doi: 10.3969/j.issn.2097-0706.2022.07.007
	GUO Zuogang, YUAN Zhiyong, XU Min, et al. Multi-energy flow calculation method for multi-energy complementary integrated energy systems[J]. Integrated Intelligent Energy, 2022, 44(7):58-65. doi: 10.3969/j.issn.2097-0706.2022.07.007
[22]	赵建立, 汤卓凡, 王桂林, 等. 具有储能作用的用户侧资源运行特性[J]. 综合智慧能源, 2022, 44(2): 8-14. doi: 10.3969/j.issn.2097-0706.2022.02.002
	ZHAO Jianli, TANG Zhuofan, WANG Guilin, et al. Operation characteristics of user-side resources with energy storage function[J]. Integrated Intelligent Energy, 2022, 44(2): 8-14. doi: 10.3969/j.issn.2097-0706.2022.02.002
[23]	方旭, 彭雪风, 张凯, 等. 燃煤热电联产系统冷端余能供热改造研究进展[J]. 华电技术, 2021, 43(3): 48-56.
	FANG Xu, PENG Xuefeng, ZHANG Kai, et al. Development of heating retrofit using waste heat from coal-fired CHP system cold end[J]. Huadian Technology, 2021, 43(3): 48-56.

计算参数		值
年平均温度/℃		13.4
室外计算温度、湿度	冬季供暖室外计算温度/℃	-6.2
	冬季空气调节室外计算温度/℃	-8.8
	冬季空气调节室外计算相对湿度/%	55
	夏季空气调节室外计算干球温度/℃	35.1
	夏季空气调节室外计算湿球温度/℃	26.8
	夏季空气调节室外计算日平均温度/℃	30.0
	夏季通风室外计算温度/℃	30.8
	夏季通风室外计算相对湿度/%	60
室外风速	夏季室外风速平均/(m·s^-1）	1.7
室外风速	冬季室外风速平均/(m·s^-1）	1.8
大气压力	夏季大气压力/hPa	995.8
大气压力	冬季大气压力/hPa	1 017.2
计算参数	平均气温≤5 ℃期间的平均温度/℃	0.1

试验孔编号	初始平均温度/℃	岩土体导热系数/[W·(m·K)^-1]	热负荷换热量/(W·m^-1)	冷负荷换热量/(W·m^-1)
^#1	16.19	2.26	48.42	51.17
^#2	17.06	3.22	43.67	45.92

地埋管数/根	土壤源热泵装机/kW	设计冷负荷/kW	冷水机组装机/kW	设备投资额/万元	夏季耗电量/(MW⋅h)
100	504	5 645	5 141	967	1 507.5
200	1 008	5 645	4 637	1 087	1 440.4
300	1 512	5 645	4 133	1 207	1 373.2
400	2 016	5 645	3 629	1 327	1 306.1
500	2 520	5 645	3 125	1 447	1 238.9
600	3 024	5 645	2 621	1 567	1 172.0

季节	地埋管数/根	单根双U型地埋管换热长度/m	地埋管换热量/kW	土壤源热泵供能量/kW
夏季	400	120	2 352	1 908
冬季	400	120	2 208	2 857

热源方式	耗能方式	电价时段	电价/[元⋅（kW⋅h）^-1]	供热成本/(元⋅GJ^-1）
土壤源热泵（C_OP取4.4）	耗电^①	低谷时段	0.368	22.70
		平段时段	0.674	41.60
		高峰时段	0.980	60.49
		尖峰时段	1.128	69.63
空气源热泵（C_OP取3.0)	耗电^①	低谷时段	0.368	34.10
		平段时段	0.674	62.40
		高峰时段	0.980	90.74
		尖峰时段	1.128	104.44
集中热网	耗电^②+购热（购热价39.72元/GJ）	低谷时段	0.368	42.56
		平段时段	0.674	44.92
		高峰时段	0.984	47.31
电锅炉	耗电^①（热效率98%）	低谷时段	0.368	107.50