Secondary heat recovery heat pipe air conditioning system

doi:10.11949/j.issn.0438-1157.20160935

Abstract

Abstract:

A secondary heat recovery heat pipe air conditioning (AC) system which performed secondary heat transfer by heat pipe heat exchanger (HPHE) is proposed. Considering the difference between secondary heat recovery HPHE AC and others, this paper designed the HPHE and built the tester. This article used Hefei as a sample, analyzed the energy consumption of the system in winter and summer. According to the analysis of experimental data, when the winter fresh air wind velocity is 1.20—1.85 m·s^-1, the heat recovery rate reaches 10%—23.2%. As the summer fresh air velocity is 1.20—2.0 m·s^-1 and the air temperature difference between indoor and outdoor is 4.2—8.0℃, the heat recovery can reach 35%—55%. Meanwhile, the reheat temperature difference 0—7.4℃ is provided for air supply. The results indicate that secondary heat recovery HPHE AC system has a unique energy-saving advantage.

Key words: recovery, heat pipe, air conditioning system, heat exchanger, enthalpy, heat transfer

摘要：

提出一种二次热回收热管式空调系统，其利用热管换热器做到二次热回收，设计该系统并搭建实验台，通过理论计算和实验比较该系统与其他系统之间的差异。以合肥为例，从理论上分析了二次热回收热管式空调系统的冬、夏季能耗，通过对实验数据的分析得出本系统冬季新风风速在1.20～1.85 m·s^-1之间热回收率能达到10%～23.2%；夏季新风风速在1.20～2.0 m·s^-1，室内外温差在4.2～8.0℃时热回收率能达到35%～55%，并提供了0～7.4℃的再热温差，表明了这种新的中央空调系统具有独特节能优势。

关键词: 回收, 热管, 空调系统, 换热器, 焓, 传热

ZHOU Zhiyong, WU Qingqing, WEI Zhongshi, LI Chunxia. Secondary heat recovery heat pipe air conditioning system[J]. CIESC Journal, 2017, 68(5): 1823-1832.

周智勇, 吴青青, 韦中师, 李春霞. 二次热回收热管式空调系统[J]. 化工学报, 2017, 68(5): 1823-1832.

References 26

[1]	郭广亮, 刘振华. 碳纳米管悬浮液强化小型重力热管换热特性[J]. 化工学报, 2007, 58(12): 3006-3010. GUO G L, LIU Z H. Heat transfer enhancement of small thermosyphon using carbon nanotube suspensions[J]. Journal of Chemical Industry and Engineering (China), 2007, 58(12): 3006-3010.
[2]	韩振兴, 王冬骁, 王飞, 等. 重力热管冷凝段运行特征的可视化实验研究[J]. 化工学报, 2014, 65(8): 2934-2939. HAN Z X, WANG D X, WANG F, et al. Visual experimental study on operation characteristics of condensation segment of gravity-assisted heat pipe[J]. CIESC Journal, 2014, 65(8): 2934-2939.
[3]	王海涛, 丁怀况. 太阳能重力热管传热性能的分析[J]. 低温与超导, 2013, 41(4): 79-82. WANG H T, DING H K. The analysis on heat transfer performance of solar gravity heat pipe[J]. Cryogenics and Superconductivity, 2013, 41(4): 79-82.
[4]	盖东兴, 刘志春, 刘伟, 等. 平板型小型环路热管的温度波动特性[J]. 化工学报, 2009, 60(6) : 1390-1397. GE D X, LIU Z C, LIU W, et al. Characteristics of temperature oscillation in miniature loop heat pipe with flat evaporator[J]. CIESC Journal, 2009, 60(6): 1390-1397.
[5]	曲燕. 环路热管技术的研究热点和发展趋势[J]. 低温与超导, 2009, 37(2): 9-14. QU Y. Hot study and development trend of loop heat pipe[J]. Cryogenics and Superconductivity, 2009, 37(2): 9-14.
[6]	WANG S F, HUO J P, ZHANG X F, et al. Experimental study on operating parameters of miniature loop heat pipe with flat evaporator[J]. Applied Thermal Engineering, 2012, 40(1): 318-325.
[7]	何松, 刘志春, 汪冬冬, 等. 双面蒸发器环路热管的瞬态特性[J]. 化工学报, 2016, 67(5): 1778-1783. HE S, LIU Z C, WANG D D, et al. Transient properties of bifacial evaporator loop heat pipe[J]. CIESC Journal, 2016, 67(5): 1778-1783.
[8]	李强, 马路, 宣益民. 低温环路热管(CLHP)的实验研究[J]. 工程热物理学报, 2010, 31(1): 120-123. LI Q, MA L, XUAN Y M. Experimental investigation of cryogenic loop heat pipe[J]. Journal of Engineering Thermophysics, 2010, 31(1): 120-123.
[9]	朱震, 王银峰, 熊国辉, 等. 新型水平环路热虹吸管启动性能[J]. 化工学报, 2016, 67(5): 1755-1761. ZHU Z, WANG Y F, XIONG G H, et al. Start-up performance of novel horizontal loop thermosyphon[J]. CIESC Journal, 2016, 67(5): 1755-1761.
[10]	莫冬传, 邹冠生, 丁楠, 等. 双通道平板型环路热管的传热特性[J]. 化工学报, 2012, 63(S1): 114-118. MO D C, ZOU G S, DING N, et al. Heat transfer characteristics of flat loop heat pipe with bi-transport loops[J]. CIESC Journal, 2012, 63(S1): 114-118.
[11]	张龙灿, 裴刚, 张涛, 等. 新型光伏-太阳能环形热管/热泵复合系统[J]. 化工学报, 2014, 65(8): 3228-3236. ZHANG L C, PEI G, ZHANG T, et al. A new photovoltaic solar-assisted loop heat pipe/heat-pump system[J]. CIESC Journal, 2014, 65(8): 3228-3236.
[12]	PEI G, FU H D, ZHU H J, et al. Performance study and parametric analysis of a novel heat pipe PV/T system[J]. Energy, 2012, 37(1): 384-395.
[13]	JI J, HE H F, CHOW T T, et al. Distributed dynamic modeling and experimental study of PV evaporator in a PV/T solar-assisted heat pump[J]. International Journal of Heat and Mass Transfer, 2008, 52(5): 1365-1373.
[14]	王铁军, 王冠英, 王蒙, 等. 高性能计算机用热管复合制冷系统设计研究[J]. 低温与超导, 2013, 41(8): 63-66. WANG T J, WANG G Y, WANG M, et al. Design and study of composite refrigeration system with heat pipe used in high-performance computer[J]. Cryogenics and Superconductivity, 2013, 41(8): 63-66.
[15]	WANG L W, WANG R Z, WU J Y, et al. Design of heat pipe type adsorption ice-making for fishing boats[J]. Chinese Journal of Chemical Engineering, 2005, 13(3): 403-410.
[16]	PEI G, ZHANG T, FU H D, et al. An experimental study on a novel heat pipe-type photovoltaic/thermal system with and without glass covers[J]. Journal of Green Energy, 2012, 10(1): 72-89.
[17]	PEI G, ZHANG T, YU Z, et al. Comparative study of a novel heat pipe photovoltaic/thermal collector and a water thermo siphon photovoltaic/thermal collector[J]. Journal of Power and Energy, 2011, 225(3): 271-278.
[18]	MOSTAFA A, ABD E, MOUSA M M. Heat pipe heat exchanger for heat recovery in air conditioning[J]. Applied Thermal Engineering, 2007, 27(4): 795-801.
[19]	JUNG E G, BOO J H. Thermal numerical model of a high temperature heat pipe heat exchanger under radiation[J]. Applied Energy, 2014, 135(1): 586-596.
[20]	JADHAV T S, LELE M M. Theoretical energy saving analysis of air conditioning system using heat pipe heat exchanger for Indian climatic zones[J]. Engineering Science and Technology, 2015, 18(4): 669-673.
[21]	AHMADZADEHTALATAPEH M, YAU Y H. The application of heat pipe heat exchangers to improve the air quality and reduce the energy consumption of the air conditioning system in a hospital ward — a full year model simulation[J]. Energy and Buildings, 2011, 43(9): 2344-2355.
[22]	AHMADZADEHTALATAPEH M. An air-conditioning system performance enhancement by using heat pipe based heat recovery technology[J]. Scientia Iranica B, 2013, 20(2): 329-336.
[23]	GUO Z J, SHAO J, LI X H, et al. Application of pump-assisted separate heat pipe on dehumidifying enhancement in air conditioning system[J]. Applied Thermal Engineering, 2016, 98(1): 374-379.
[24]	李晓花, 邵杰, 刘瑞璟, 等. 动力型热管内R134a流动沸腾传热过程的特性[J]. 化工学报, 2016, 67(5): 1822-1829. LI X H, SHAO J, LIU R J, et al. Characteristics of flow boiling heat transfer for R134a in pump-assisted separated heat pipe[J]. CIESC Journal, 2016, 67(5): 1822-1829.
[25]	方彬. 热管节能减排换热器设计与应用[M]. 北京: 化学工业出版社, 2013: 21-80. FANG B. Energy Saving Heat Pipe Heat Exchanger Design and Application[M]. Beijing: Chemical Industry Press, 2013: 21-80.
[26]	廉乐明, 谭羽非, 吴家正, 等. 工程热力学[M]. 北京: 中国建筑工业出版社, 2006: 138-145. LIAN L M, TAN Y F, WU J Z, et al. Engineering Thermodynamics[M]. Beijing: China Architecture and Building Press, 2006: 138-145. simulation[J]. Energy and Buildings, 2011,43(9):2344-2355.
[22]	M.Ahmadzadehtalatapeh. An air-conditioning system performance enhancement by using heat pipe based heat recovery technology[J]. Scientia Iranica B,2013,20(2):329-336.
[23]	GUO Z J, SHAO J, LI X H, LIU RJ, WANG W, TIAN X L. Application of pump-assisted separate heat pipe on dehumidifying enhancement in air conditioning system[J]. Applied Thermal Engineering,2016,98(1):374-379.
[24]	李晓花, 邵杰, 刘瑞璟, 马腾飞, 郭振江, 田晓亮. 动力型热管内R134a流动沸腾传热过程的特性[J]. 化工学报, 2016,67(5):1822-1829. LI X H, SHAO J, LIU R J, MA T F, GUO Z J, TIAN X L. Characteristics of flow boiling heat transfer for R134a in pump-assisted separated heat pipe. CIESC Journal, 2016,67(5):1822-1829.
[25]	方彬. 热管节能减排换热器设计与应用[M]. 北京:化学工业出版社,2013:21-80. FANG B. Energy saving heat pipe heat exchanger design and application[M].BEIJING:Chemical Industry Press,2013:21-80.
[26]	廉乐明, 谭羽非, 吴家正, 朱彤. 工程热力学[M]. 北京:中国建筑工业出版社,2006:138-145. LIAN L M, TAN Y F, WU J Z, et al. Engineering Thermodynamics[M]. BEUIJING:China architecture and building press,2006:138-145.