进出口水温对大温差洗浴废水热泵机组性能的影响
|
摘要
洗浴废水中含有大量废热,为最大限度地回收洗浴废水热能,提出了双机串联大温差热泵机组。机组额定设计工况为:蒸发器侧洗浴废水进出口温度分别为30℃和6℃,冷凝器侧自来水进口温度为10℃,制取热水出口温度为45℃。通过实验研究了自来水进口温度、热水出口温度及洗浴废水入口温度对热泵机组制热性能(COP)的影响。实验结果表明,当自来水进口温度从5℃升高到15℃时,整体机组COP从5.0降低到3.85;当热水出口温度从40℃变化到50℃时,整体机组COP降低了7.5%;当洗浴废水进口温度从30℃升高到35℃时,整体机组COP提高了3.1%。在无辅助热源时,若洗浴废水温度从30℃降低到6℃,热水出水温度为45℃,自来水的温度必须要高于12℃;若洗浴废水入口温度达到35℃,即使自来水温度为6℃,热水出口温度也能达到45℃。
Bathing was tewater contains a large amount of neaste heat,a double heat pump unit in series with large temperature difference was proposed to maximize the recovery of waste heat energy from bathing wastewater.The rated design conditions of the unit are as follows,the inlet and outlet temperatures of the bathing wastewater on the evaporator side are 30℃and 6℃、respectively and the inlet temperature of tap water on the condenser side is 10℃ with hot water outlet temperature at 45℃.In this study,the effects of inlet temperature of tap water,outlet temperature of hot water and inlet temperature of bath wastewater on thermal performance of heat pump unit were studied experimentally.The experimental results showed that the COP reduced from 5.0 to 3.85 as the inlet temperature of tap water increased from 5℃to 15℃.When the outlet temperature of the hot water changed from 40 ℃ to 50 ℃,the COP reduced by 7.5%.And when the inlet temperature of bathing wastewater rose from 30 ℃ to 35 ℃,the COP increased by3.1%.In the absence of an auxiliary heat source,if the bathing wastewater temperature reduces from30℃to 6 ℃,the tap water temperature must be higher than 12 ℃ to ensure that the hot water outlet temperature is 45 ℃.Besides,when the inlet temperature of bathing wastewater reaches 35 ℃,the hot water outlet temperature can also reach 45℃even if the tap water temperature is 6℃.
Bathing was tewater contains a large amount of neaste heat,a double heat pump unit in series with large temperature difference was proposed to maximize the recovery of waste heat energy from bathing wastewater.The rated design conditions of the unit are as follows,the inlet and outlet temperatures of the bathing wastewater on the evaporator side are 30℃and 6℃、respectively and the inlet temperature of tap water on the condenser side is 10℃ with hot water outlet temperature at 45℃.In this study,the effects of inlet temperature of tap water,outlet temperature of hot water and inlet temperature of bath wastewater on thermal performance of heat pump unit were studied experimentally.The experimental results showed that the COP reduced from 5.0 to 3.85 as the inlet temperature of tap water increased from 5℃to 15℃.When the outlet temperature of the hot water changed from 40 ℃ to 50 ℃,the COP reduced by 7.5%.And when the inlet temperature of bathing wastewater rose from 30 ℃ to 35 ℃,the COP increased by3.1%.In the absence of an auxiliary heat source,if the bathing wastewater temperature reduces from30℃to 6 ℃,the tap water temperature must be higher than 12 ℃ to ensure that the hot water outlet temperature is 45 ℃.Besides,when the inlet temperature of bathing wastewater reaches 35 ℃,the hot water outlet temperature can also reach 45℃even if the tap water temperature is 6℃.
引文
[1]崔福义,杨海燕,马放,等.洗浴废水循环再利用技术的探讨和分析[J].环境污染治理技术与设备,2004,5(5):67-71.CUI F Y,YANG H Y,MA F,et al.Discussion and analysis of bathing wastewater reuse technology[J].Techniques and Equipment for Environmental Pollution Control,2004,5(5):67-71.(in Chinese)
[2]寇广孝,王汉青,王贤林.电热泵用于浴室生产热水的理论热力循环分析[J].流体机械,2003,31(4):49-50.KOU G X,WANG H Q,WANG X L.Analysis on the thermal circulation of electrical heat pump applied in the public bathing house[J].Fluid Machinery,2003,31(4):49-50.(in Chinese)
[3]邵光威.低温废弃热水余热回收利用的实验研究[D].天津:天津大学,2014.SHAO G W.Experimental study on low temperature waste water heat recovery[D]. Tianjin:Tianjin University,2014.(in Chinese)
[4]李雪薇.公共浴室废水热回收池壁换热及除垢技术研究[D].北京:北京建筑大学,2017.LI X W.The study on the wall heat transfer of public bath wastewater heat recovery and descaling technology[D].Beijing:Beijing University of Civil Engineering and Architecture,2017.(in Chinese)
[5]SHEN C,JIANG Y Q,YAO Y,et al.A field study of a wastewater source heat pump for domestic hot water heating[J].Building Services Engineering Research and Technology,2013,34(4):433-448.
[6]SHEN C,YANG L C, WANG X L,et al.An experimental and numerical study of a de-fouling evaporator used in a wastewater source heat pump[J].Applied Thermal Engineering,2014,70(1):501-509.
[7]GOU X,FU Y,SHAH I,et al.Research on a household dual heat source heat pump water heater with preheater based on ASPEN PLUS[J].Energies,2016,9(12):1026.
[8]GU Y X,WANG T,LIU W,et al.Energy-saving analysis and heat transfer performance of wastewater source heat pump[J]. Applied Mechanics and Materials,2014,694:211-217.
[9]BAEK N C,SHIN U C,YOON J H.A study on the design and analysis of a heat pump heating system using wastewater as a heat source[J].Solar Energy,2005,78(3):427-440.
[10]KAHRAMAN A,ELEBI A.Investigation of the performance of a heat pump using waste water as a heat source[J].Energies,2009,2(3):697-713.
[11]LIU L B,FU L,JIANG Y.Application of an exhaust heat recovery system for domestic hot water[J].Energy,2010,35(3):1476-1481.
[12]郁文红,李姗姗,王美琳.洗浴废热能量回收与中水水源热泵应用[J].建筑节能,2017,45(7):113-115.YU W H,LI S S,WANG M L.Bathing waste heat recovery and water source heat pump application[J].Building Energy Efficency,2017,45(7):113-115.(in Chinese)
[13]李玲俐.以洗浴废水为热源的浴室热泵热水系统的研究[D].天津:天津科技大学,2013.LI L L.Research on the heat pump hot water system uesdin in bathroom with the bath wastewater as heat source[D]. Tianjin:Tianjin University of Science &Technology,2013.(in Chinese)
[14]宋国军.水源热泵机组水源侧串联运行特性研究[D].天津:天津大学,2005.SONG G J.Study on characteristic of water source heat pumps in series[D].Tianjin:Tianjin University,2005.(in Chinese)
[15]BAIK Y J,KIM M,CHANG K C,et al.Potential to enhance performance of seawater-source heat pump by series operation[J].Renewable Energy,2014,65:236-244.
[16]LIU F G,DONG F J,LI Y J,et al.Study on the heating performance and optimal intermediate temperature of a series gas engine compressionabsorption heat pump system[J].Applied Thermal Engineering,2018,135:34-40.
[17]马良栋,张吉礼.一种热泵式废水热能再利用热水机组:2015 2 0828317.4[P].2016-03-09.Ma L D,ZHANG J L.A heat pumps hot water unit with wastewater thermal energy as heat source:2015 20828317.4[P].2016-03-09.(in Chinese)
[18]MA L D,ZHEN X Z,ZHANG J L.The performance simulation analysis of the sewage-source heat pump heater unit dealing with large temperature difference[J].Procedia Engineering,2017,205:1769-1776.
[19]甑先子.大温差洗浴废水热泵热水机组性能试验研究[D].辽宁大连:大连理工大学,2018.ZENG X Z.Experimental study on performance of large temperature difference bathing waste water heat pump hot water unit[D].Dalian,Liaoning:Dalian University of Technology,2018.(in Chinese)
[2]寇广孝,王汉青,王贤林.电热泵用于浴室生产热水的理论热力循环分析[J].流体机械,2003,31(4):49-50.KOU G X,WANG H Q,WANG X L.Analysis on the thermal circulation of electrical heat pump applied in the public bathing house[J].Fluid Machinery,2003,31(4):49-50.(in Chinese)
[3]邵光威.低温废弃热水余热回收利用的实验研究[D].天津:天津大学,2014.SHAO G W.Experimental study on low temperature waste water heat recovery[D]. Tianjin:Tianjin University,2014.(in Chinese)
[4]李雪薇.公共浴室废水热回收池壁换热及除垢技术研究[D].北京:北京建筑大学,2017.LI X W.The study on the wall heat transfer of public bath wastewater heat recovery and descaling technology[D].Beijing:Beijing University of Civil Engineering and Architecture,2017.(in Chinese)
[5]SHEN C,JIANG Y Q,YAO Y,et al.A field study of a wastewater source heat pump for domestic hot water heating[J].Building Services Engineering Research and Technology,2013,34(4):433-448.
[6]SHEN C,YANG L C, WANG X L,et al.An experimental and numerical study of a de-fouling evaporator used in a wastewater source heat pump[J].Applied Thermal Engineering,2014,70(1):501-509.
[7]GOU X,FU Y,SHAH I,et al.Research on a household dual heat source heat pump water heater with preheater based on ASPEN PLUS[J].Energies,2016,9(12):1026.
[8]GU Y X,WANG T,LIU W,et al.Energy-saving analysis and heat transfer performance of wastewater source heat pump[J]. Applied Mechanics and Materials,2014,694:211-217.
[9]BAEK N C,SHIN U C,YOON J H.A study on the design and analysis of a heat pump heating system using wastewater as a heat source[J].Solar Energy,2005,78(3):427-440.
[10]KAHRAMAN A,ELEBI A.Investigation of the performance of a heat pump using waste water as a heat source[J].Energies,2009,2(3):697-713.
[11]LIU L B,FU L,JIANG Y.Application of an exhaust heat recovery system for domestic hot water[J].Energy,2010,35(3):1476-1481.
[12]郁文红,李姗姗,王美琳.洗浴废热能量回收与中水水源热泵应用[J].建筑节能,2017,45(7):113-115.YU W H,LI S S,WANG M L.Bathing waste heat recovery and water source heat pump application[J].Building Energy Efficency,2017,45(7):113-115.(in Chinese)
[13]李玲俐.以洗浴废水为热源的浴室热泵热水系统的研究[D].天津:天津科技大学,2013.LI L L.Research on the heat pump hot water system uesdin in bathroom with the bath wastewater as heat source[D]. Tianjin:Tianjin University of Science &Technology,2013.(in Chinese)
[14]宋国军.水源热泵机组水源侧串联运行特性研究[D].天津:天津大学,2005.SONG G J.Study on characteristic of water source heat pumps in series[D].Tianjin:Tianjin University,2005.(in Chinese)
[15]BAIK Y J,KIM M,CHANG K C,et al.Potential to enhance performance of seawater-source heat pump by series operation[J].Renewable Energy,2014,65:236-244.
[16]LIU F G,DONG F J,LI Y J,et al.Study on the heating performance and optimal intermediate temperature of a series gas engine compressionabsorption heat pump system[J].Applied Thermal Engineering,2018,135:34-40.
[17]马良栋,张吉礼.一种热泵式废水热能再利用热水机组:2015 2 0828317.4[P].2016-03-09.Ma L D,ZHANG J L.A heat pumps hot water unit with wastewater thermal energy as heat source:2015 20828317.4[P].2016-03-09.(in Chinese)
[18]MA L D,ZHEN X Z,ZHANG J L.The performance simulation analysis of the sewage-source heat pump heater unit dealing with large temperature difference[J].Procedia Engineering,2017,205:1769-1776.
[19]甑先子.大温差洗浴废水热泵热水机组性能试验研究[D].辽宁大连:大连理工大学,2018.ZENG X Z.Experimental study on performance of large temperature difference bathing waste water heat pump hot water unit[D].Dalian,Liaoning:Dalian University of Technology,2018.(in Chinese)