保温对地热单井换热性能的影响分析

doi:10.11949/0438-1157.20190412

化工学报 ›› 2019, Vol. 70 ›› Issue (11): 4191-4198.DOI: 10.11949/0438-1157.20190412

保温对地热单井换热性能的影响分析

冉运敏^1,⁴(),卜宪标^1,^2,³()

1. 中国科学院广州能源研究所，广东广州 510640
2. 中国科学院可再生能源重点实验室，广东广州 510640
3. 广东省;新能源和可再生能源研究开发与应用重点实验室，广东广州 510640
4. 中国科学院大学，北京100049

收稿日期:2019-04-18 修回日期:2019-08-29 出版日期:2019-11-05 发布日期:2019-11-05
通讯作者: 卜宪标
作者简介:冉运敏（1996—），女，硕士研究生，ranym@ms.giec.ac.cn
基金资助:
国家重点研发计划项目(2018YFB1501805);广东省自然科学基金项目(2018A030313018);国家自然科学基金项目(41972314)

Influence analysis of insulation on performance of single well geothermal heating system

Yunmin RAN^1,⁴(),Xianbiao BU^1,^2,³()

1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
2. Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
3. Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, Guangdong, China
4. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-04-18 Revised:2019-08-29 Online:2019-11-05 Published:2019-11-05
Contact: Xianbiao BU

摘要/Abstract

摘要：

建立了单井地热传热数学模型，模拟了单井地热流动换热过程，比较分析了不同保温材料及保温深度对采出水温度和取热功率的影响。结果表明：保温材料热导率和保温深度对系统取热功率有很大影响。当保温材料热导率为0.03 W/( m·K)和0.5 W/( m·K)时，平均取热功率分别为732.08 kW和640.98 kW；采用热导率为0.03 W/( m·K)的保温材料，保温深度1000 m时流体进出口温差为10.33 K，保温深度为2000 m时流体进出口温差为15.98 K，保温深度为3000 m 时流体进出口温差为17.93 K。实际工程中，可以采用各种材料组合安装的形式对采出井进行保温，保温重点为井深较小处，这样既能保证采出水温，又能节约成本。

关键词: 地热能, 地热单井, 传热, 保温管, 数值模拟, 计算流体力学

Abstract:

The heat transfer mathematical model of single well geothermal is established and the heat transfer process of single well geothermal is simulated. The effects of different insulation materials and depth on the fluid outlet temperature and heating power are compared and analyzed. The results show that the thermal conductivity of insulation material and the depth of the insulation installation have great influence on the heating power of the system. When the thermal conductivity of material are 0.03 W/(m·K) and 0.5 W/(m·K), the average heating power are 732.08 kW and 640.98 kW, respectively. When the thermal conductivity is 0.03 W/(m·K) and the depth of insulation installation is 1000 m, the temperature difference between inlet and outlet is 10.33 K, when the depth of insulation installation is 2000 m, the temperature difference between inlet and outlet is 15.98 K and when the depth of insulation installation is 3000 m, the temperature difference between inlet and outlet is 17.93 K. In the actual project, the production wells can be insulated by means of various materials and installations. The heat preservation focus is on the small depth of the well, which can ensure the production water temperature and save costs.

Key words: geothermal energy, geothermal single well, heat transfer, thermal insulation pipe, numerical simulation, computational fluid dynamics

中图分类号:

TK 529

冉运敏, 卜宪标. 保温对地热单井换热性能的影响分析[J]. 化工学报, 2019, 70(11): 4191-4198.

Yunmin RAN, Xianbiao BU. Influence analysis of insulation on performance of single well geothermal heating system[J]. CIESC Journal, 2019, 70(11): 4191-4198.

图/表 11

图1 地热井结构示意图

Fig.1 Schematic diagram of geothermal well structure

表1 其他相关计算参数

Table 1 Other calculation parameters

参数及单位	数值
井管直径/m	0.1778
井管厚度/m	0.00691
内管外径/m	0.12
内管厚度/m	0.01
注入速度/(m/s)	1
井深/m	3000

图2 不考虑保温时流体出口温度及取热功率

Fig.2 Outlet temperature and heat power without considering isulation

表2 各管材热导率

Table 2 Thermal conductivity of different materials

材料	热导率/(W/(m?K))
硬质聚氨酯材料	0.03
双层真空隔热管	0.06
PVC管	0.14
PPR管	0.20
LDPE管	0.33
HDPE管	0.50

图3 不同内管材料对应的采出水温度和取热功率(Tbot为流体到达井底温度)

Fig.3 Fluid temperature and heat power of produced water in different materials

图4 不同内管材料对应的井内流体温度沿井深的变化

Fig.4 Fluid temperature along depth of well in different materials

图5 对0~2000 m管段进行保温处理时流体温度沿井深方向的变化

Fig. 5 Fluid temperature along well depth when 0—2000 m pipe section is insulated

图6 对管道进行不同深度保温时流体温度沿井深方向的变化

Fig.6 Fluid temperature varies in different insulation length along well depth

表3 四种不同保温管布置方案 pipes/(W/(m?K))

Table 3 Layout schemes of different insulation pipes/(W/(m?K))

方案	深度/m
方案	0~1000	1000~2000	2000~3000
方案一	0.06	0.06	0.06
方案二	0.06	0.06	0.2
方案三	0.06	0.2	0.2
方案四	0.2	0.2	0.2

图7 采出井内流体温度沿井深方向的变化

Fig.7 Fluid temperature of produced well varies along depth of well

表4 不同方案下采出井流体温度随深度的变化

Table 4 Fluid temperature variation with depth in different schemes

项目		井深/m
项目		0~1000	1000~2000	2000~3000
方案一	温降/K	0.617	0.452	0.173
方案一	热量损失/kW	25.32	18.55	7.10
方案二	温降/K	0.740	0.543	0.684
方案二	热量损失/kW	30.37	22.28	28.07
方案三	温降/K	0.733	1.762	0.677
方案三	热量损失/kW	30.08	72.31	27.78
方案四	温降/K	2.388	1.702	0.666
方案四	热量损失/kW	97.99	69.84	27.33

参考文献 33

1	石文, 刘秋新. 地源热泵系统中地下热堆积问题的解决方案[J]. 建筑节能, 2009, 37(9): 54-55+67.
	ShiW, LiuQ X. Solution on geothermal accumulation of ground-source heat pump system[J]. New Energy & Environment, 2009, 37(9): 54-55+67.
2	马宏权, 龙惟定. 地埋管地源热泵系统的热平衡[J]. 暖通空调, 2009, 39(1): 102-106.
	MaH Q, LongW D. Ground heat balance in GSHP[J]. Heating Ventilating & Air Conditioning, 2009, 39(1): 102-106.
3	SannerB, KarytsasC, MendrinosD, et al. Current status of ground source heat pumps and underground thermal energy storage in Europe[J]. Geothermics, 2003, 32(4): 579-588.
4	DijkshoornL, SpeerS, PechnigR. Measurements and design calculations for a deep coaxial borehole heat exchanger in Aachen, Germany[J]. International Journal of Geophysics, 2013, 2013: 1-14.
5	KohlT, BrenniR, EugsterW. System performance of a deep borehole heat exchanger[J]. Geothermics, 2002, 31(6): 687-708.
6	KohlT, SaltonM, RybachL. Data analysis of the deep borehole heat exchanger plant weissbad (Switzerland)[C]// Proc. World Geothermal Congress. 2000.
7	MoritaK, BollmeierW S, MizogamiH. An experiment to prove the concept of the downhole coaxial heat exchanger (DCHE) in Hawaii[J]. Geothermal Resources Council Trans, 1992, 16: 9-16.
8	孔彦龙, 陈超凡, 邵亥冰, 等. 深井换热技术原理及其换热量评估[J]. 地球物理学报, 2017, 60(12): 4741-4752.
	KongY L, ChenC F, ShaoH B, et al. Principle and capacity quantification of deep-borehole heat exchangers[J]. Chinese Journal of Geophysics, 2017, 60(12): 4741-4752.
9	BeierR A, SmithM D, SpitlerJ D. Reference data sets for vertical borehole ground heat exchanger models and thermal response test analysis[J]. Geothermics, 2010, 40(1): 79-85.
10	IngersollL R Z, OttoJ, IngersollA C. Heat Conduction, with Engineering, Geological, and Other Applications[M]. Wisconsin, 1954.
11	BallD A, FischerR D, HodgettD L. Design methods for ground-source heat pumps[J]. ASHRAE Transactions, 1983, 89: 416-440.
12	EskilsonP, ClaessonJ. Simulation model for thermally interacting heat extraction boreholes[J]. Numerical Heat Transfer, 1988, 13(2): 149-165.
13	CarslawH S, IeagerJ C. Conduction of heat in solids[J]. Physics Today, 1962, 15(11): 74-76.
14	MeiV C. Heat-transfer of buried pipe for heat-pump application[J]. J. Sol. Energ.-T. ASME, 1991, 113(1): 51-55.
15	ChengW L, LiT T, NianY L, et al. Studies on geothermal power generation using abandoned oil wells[J]. Energy, 2013, 59: 248-254.
16	YangW B, SunL L, ChenY P. Experimental investigations of the performance of a solar-ground source heat pump system operated in heating modes[J]. Energy Buildings, 2015, 89: 97-111.
17	CaulKR, TomacI. Reuse of abandoned oil and gas wells for geothermal energy production[J]. Renew. Energ., 2017, 112: 388-397.
18	DavisA P, MichaelidesE E. Geothermal power production from abandoned oil wells[J]. Energy, 2009, 34(7): 866-872.
19	KujawaT, NowakW, StachelA A. Utilization of existing deep geological wells for acquisitions of geothermal energy[J]. Energy, 2006, 31(5): 650-664.
20	卜宪标, 马伟斌, 黄远峰. 应用废弃油气井获得地热能[J]. 热能动力工程, 2011, 26(5): 621-625+38.
	BuX B, MaW B, HuangY F. Geothermal energy obtained from obsolete oil and gas production wells[J]. Journal of Engineering for Thermal Energy and Power, 2011, 26(5): 621-625+38.
21	章岩, 何廷树, 曹万智, 等. 纤维水镁石在复合节能保温涂料中的应用研究[J]. 新型建筑材料, 2007, (8): 81-84.
	ZhangY, HeT S, CaoW Z, et al. Study on application of brucite fiber to composite paint with energy-saving and thermal insulation[J]. New Building Materials, 2007, (8): 81-84.
22	陈卫东, 张国侠, 刘嫄春. EPS新型节能墙体外保温材料[J]. 新型建筑材料, 2007, (6): 41-43.
	ChenW D, ZhangG X, LiuY C. Thermal insulation material outside EPS new energy conservation wall[J]. New Building Materials, 2007, (6): 41-43.
23	高学农, 王端阳, 黄活阳, 等. 新型多孔保温材料的制备及性能[J]. 华南理工大学学报(自然科学版), 2007, (5): 113-116+31.
	GaoX N, WangD Y, HuangH Y, et al. Preparation and properties of new-type porous thermal insulation material[J]. Journal of South China University of Technology (Natural Science Edition), 2007, ( 5): 113-116+31.
24	王理学, 刘清良. 高真空隔热油管隔热机理及隔热结构的研究[J]. 山东理工大学学报(自然科学版), 2003, (4): 93-96.
	WangL X, LiuQ L. Acquisition and maintenance of the vacuum degree of high vacuum heat insulation oil pipe[J]. Journal of Shandong University of Technology (Sci. & Tech.), 2003, (4: 93-96.
25	刘显茜, 陈君若, 侯宏英, 等. 保温材料管道保温性能分析[J]. 湖南科技大学学报(自然科学版), 2009, 24(1): 41-44.
	LiuX X, ChenJ R, HouH Y, et al. Analysis of the property of insulated material around the pipeline[J]. Journal of Hunan University of Science & Technology (Natural Science Edition), 2009, 24(1): 41-44.
26	董重成, 那威, 李岩. 供热管网保温厚度的计算分析[J]. 暖通空调, 2005, (2): 7-10.
	DongZ C, NaW, LiY. Calculation and analysis on insulation thickness of heating pipes[J]. Heating Ventilating & Air Conditioning, 2005, (2): 7-10.
27	刘晓燕, 郭敬红, 戴萍. 埋地热油保温管道传热系数测试分析[J]. 油气田地面工程, 2004, (12): 15.
	LiuX Y, GuoJ H, DaiP. Test and analysis of heat transfer coefficient of buried hot oil insulation pipeline[J]. Oil-Gas Field Surface Engineering, 2004, (12): 15.
28	刘俊, 张旭, 高军, 等. 地源热泵桩基埋管传热性能测试与数值模拟研究[J]. 太阳能学报, 2009, 30(6): 727-731.
	LiuJ, ZhangX, GaoJ, et al. Heat transfer performance test and numerical simulation of pile-pipe groud source heat pump system[J]. Acta Energiae Solaris Sinica, 2009, 30(6): 727-731.
29	李旻, 刁乃仁, 方肇洪. 单井回灌地源热泵地下传热数值模型研究[J]. 太阳能学报, 2007, (12): 1394-1401.
	LiM, DiaoN R, FangZ H. Study on numerical heat transfer models of standing column well[J]. Acta Energiae Solaris Sinica, 2007, (12): 1394-1401.
30	卜宪标, 谭羽非, 李炳熙, 等. 盐穴地下储油库热质交换及蠕变[J]. 西安交通大学学报, 2009, 43(11): 104-108.
	BuX B, TanY F, LiB X, et al. Heat and mass transfer and creep in underground oil storage with cavern[J]. Journal of Xi an Jiaotong University, 2009, 43(11): 104-108.
31	HasanA R, KabirC S. Modeling two-phase fluid and heat flows in geothermal wells[J]. Journal of Petroleum Science and Engineering, 2010, 71(1/2): 77-86.
32	杨世铭, 陶文铨. 传热学[M]. 4版. 北京: 高等教育出版社, 2006.
	YangS M, TaoW Q. Heat Transfer[M]. 4th ed. Beijing: Higher Education Press, 2006.
33	BuX B, RanY M, ZhangD D. Experimental and simulation studies of geothermal single well for building heating [J]. Renewable Energy, 2019, 143: 1902-1909.

[1]	宋嘉豪, 王文. 斯特林发动机与高温热管耦合运行特性研究[J]. 化工学报, 2023, 74(S1): 287-294.
[2]	张思雨, 殷勇高, 贾鹏琦, 叶威. 双U型地埋管群跨季节蓄热特性研究[J]. 化工学报, 2023, 74(S1): 295-301.
[3]	晁京伟, 许嘉兴, 李廷贤. 基于无管束蒸发换热强化策略的吸附热池的供热性能研究[J]. 化工学报, 2023, 74(S1): 302-310.
[4]	程成, 段钟弟, 孙浩然, 胡海涛, 薛鸿祥. 表面微结构对析晶沉积特性影响的格子Boltzmann模拟[J]. 化工学报, 2023, 74(S1): 74-86.
[5]	肖明堃, 杨光, 黄永华, 吴静怡. 浸没孔液氧气泡动力学数值研究[J]. 化工学报, 2023, 74(S1): 87-95.
[6]	叶展羽, 山訸, 徐震原. 用于太阳能蒸发的折纸式蒸发器性能仿真[J]. 化工学报, 2023, 74(S1): 132-140.
[7]	张双星, 刘舫辰, 张义飞, 杜文静. R-134a脉动热管相变蓄放热实验研究[J]. 化工学报, 2023, 74(S1): 165-171.
[8]	张义飞, 刘舫辰, 张双星, 杜文静. 超临界二氧化碳用印刷电路板式换热器性能分析[J]. 化工学报, 2023, 74(S1): 183-190.
[9]	陈爱强, 代艳奇, 刘悦, 刘斌, 吴翰铭. 基板温度对HFE7100液滴蒸发过程的影响研究[J]. 化工学报, 2023, 74(S1): 191-197.
[10]	刘明栖, 吴延鹏. 导光管直径和长度对传热影响的模拟分析[J]. 化工学报, 2023, 74(S1): 206-212.
[11]	王志国, 薛孟, 董芋双, 张田震, 秦晓凯, 韩强. 基于裂隙粗糙性表征方法的地热岩体热流耦合数值模拟与分析[J]. 化工学报, 2023, 74(S1): 223-234.
[12]	李科, 文键, 忻碧平. 耦合蒸气冷却屏的真空多层绝热结构对液氢储罐自增压过程的影响机制研究[J]. 化工学报, 2023, 74(9): 3786-3796.
[13]	何松, 刘乔迈, 谢广烁, 王斯民, 肖娟. 高浓度水煤浆管道气膜减阻两相流模拟及代理辅助优化[J]. 化工学报, 2023, 74(9): 3766-3774.
[14]	齐聪, 丁子, 余杰, 汤茂清, 梁林. 基于选择吸收纳米薄膜的太阳能温差发电特性研究[J]. 化工学报, 2023, 74(9): 3921-3930.
[15]	李艺彤, 郭航, 陈浩, 叶芳. 催化剂非均匀分布的质子交换膜燃料电池操作条件研究[J]. 化工学报, 2023, 74(9): 3831-3840.

保温对地热单井换热性能的影响分析

Influence analysis of insulation on performance of single well geothermal heating system

RichHTML

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

图/表 11

参考文献 33

相关文章 15

编辑推荐

Metrics

本文评价