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Optimization model analysis of centralized groundwater source heat pump system in heating season

Shilei LU,Yunfang QI,Zhe CAI,Yiran LI

Frontiers in Energy 2015, Volume 9, Issue 3,   Pages 343-361 doi: 10.1007/s11708-015-0372-8

Abstract: The ground-water heat-pump system (GWHP) provides a high efficient way for heating and cooling whileFirst, the groundwater thermal transfer calculation under slow heat transfixion and transient heat transfixionwas established by calculating the heat transfer simulation software Flow Heat and using correctionin this paper has an important guiding significance to the actual operation of underground water sourceheat pump.

Keywords: optimization model     groundwater source heat pump system     theoretical analysis     example verification     heating    

Water pumping analysis and experimental validation of beach well infiltration intake system in a seawatersource heat pump system

Huan ZHANG,Shu LIU,Xuejing ZHENG,Gaofeng CHEN

Frontiers in Energy 2015, Volume 9, Issue 3,   Pages 335-342 doi: 10.1007/s11708-015-0365-7

Abstract: Based on energy conservation equation and Darcy’s law, a model of beach well infiltration intake systemapplied in a seawater source heat pump system was established.The model consists of the seawater seepage and the heat transfer process.A porous medium model in a software named FLUENT was applied to simulate the seepage and the heat transferimpervious boundary becomes longer, when the distance between the beach well and the supplying water source

Keywords: water pumping analysis     experimental validation     infiltration intake system     seawater source heat pump    

Optimisation for interconnected energy hub system with combined ground source heat pump and borehole

Da HUO, Wei WEI, Simon Le BLOND

Frontiers in Energy 2018, Volume 12, Issue 4,   Pages 529-539 doi: 10.1007/s11708-018-0580-0

Abstract: Ground source heat pumps (GSHP) give zero-carbon emission heating at a residential level.However, as the heat is discharged, the temperature of the ground drops, leading to a poorer efficiencyTo adequately utilize the high performance of combined GSHP and the borehole system to further increasesystem efficiency and reduce cost, such a combined heating system is incorporated into the interconnectedmulti-carrier system to support the heat load of a community.

Keywords: borehole thermal storage     energy hub     ground source heat pumps (GSHP)     particle swarm optimisation    

Performance analysis of an air-source heat pump using an immersed water condenser

Jie JI, Huide FU, Hanfeng HE, Gang PEI,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 234-245 doi: 10.1007/s11708-009-0056-3

Abstract: A distributed model of an air-source heat pump (ASHP) system and its experimental setup using an immersedThe results indicated that the system coefficient of performance (COP) decreased as the condenser temperatureThis paper provides the theoretical and experimental background for ASHP system optimization and a valuablereference for a solar air-source heat pump water heater when the solar irradiation energy is insufficient

Keywords: air-source     heat pump     distributed model     immersed water condenser    

R&D of the ground-coupled heat pump technology in China

Nairen DIAO, Ping CUI, Junhong LIU, Zhaohong FANG,

Frontiers in Energy 2010, Volume 4, Issue 1,   Pages 47-54 doi: 10.1007/s11708-009-0080-3

Abstract: The ground-coupled heat pump (GCHP) systems have been identified as one of the best sustainable energytwo-dimensional solid cylindrical source models and their analytical solutions are devised to deal withpile ground heat exchangers.Analytical solutions are also derived for vertical and inclined finite line source models as well asfor a groundwater advection model.

Keywords: ground source heat pump     ground heat exchanger     HVAC     China    

Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 394-402 doi: 10.1007/s11708-014-0310-1

Abstract: The aim of this study is to evaluate the performance of a centralized open-loop ground-water heat pump(GWHP) system for climate conditioning in Beijing with a cold climate in China.Thus, a long-time test was conducted on a running GWHP system for the heating season from December 2011The analysis of the testing data indicates that the average heat-pump coefficient of performance (COP) and the COP of the system (COPs) are 4.27 and 2.59.

Keywords: ground-water heat pump (GWHP)     actual coefficient of performance     heat transfixion    

A solar assisted heat pump drying system for grain in-store drying

Haifeng LI, Yanjun DAI, Jianguo DAI, Xibo WANG, Lei WEI,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 386-391 doi: 10.1007/s11708-010-0003-3

Abstract: solar assisted drying process has been developed, which consists of a set including a solar-assisted heatpump, a ventilation system, a grain stirrer, etc.A solar-assisted heat pump drying system has been designed and manufactured for a practical granary,shows that the solar fraction of the unit is higher than 20%, the coefficient of performance about system

Keywords: solar energy     heat pump     airflow     in-store drying    

Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 414-436 doi: 10.1007/s11708-017-0507-1

Abstract: Absorption heat pump attracts increasing attention due to its advantages in low grade thermal energyIn this paper, three important aspects for absorption heat pump for waste heat reuse are reviewed.In the first part, different absorption heat pump cycles are classified and introduced.pump are classified based on the refrigerant.In the third part, the applications of the absorption heat pump and absorption heat transformer for waste

Keywords: absorption     heat pump     heat transformer     waste heat     working pair    

Novel Radiation-Adjustable Heating Terminal Based on Flat Heat Pipe Combined with Air Source Heat Pump Article

Yifan Wu,Hongli Sun,Mengfan Duan,Borong Lin,Hengxin Zhao,Chaohung Liu

Engineering 2023, Volume 20, Issue 1,   Pages 192-207 doi: 10.1016/j.eng.2021.09.019

Abstract: As a clean and sustainable electrified heating technology, air-source heat pumps (ASHPs) are widely usedResults showed that the maximum heating capacity increased by 23.6% and radiation heat transfer ratioFurther, new flat heat pipe (FHP) design improved stability (compressor oil return), intermittency (refrigerant

Keywords: Novel heating terminal     Air-source heat pump     Structural improvement design     Maximum heating capacity     Rapid    

Numerical study of a hybrid absorption-compression high temperature heat pump for industrial waste heat

Zhiwei MA, Huashan BAO, Anthony Paul ROSKILLY

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 503-509 doi: 10.1007/s11708-017-0515-1

Abstract: The present paper aims at exploring a hybrid absorption-compression heat pump (HAC-HP) to upgrade andThe new HAC-HP system proposed has a condenser, an evaporator, and one more solution pump, compared toheat.routes; one is via the compression of compressor while the other is via the condenser, the solution pumpThe temperature lift increases with the increasing system recirculation flow ratio, however, the system

Keywords: absorption compression     high temperature heat pump     efficiency     industrial waste heat     thermodynamic analysis    

Dynamic Performance of PV/T Solar-assisted Heat Pump System

Pei Gang,Ji Jie,He Wei,Sun Wei

Strategic Study of CAE 2006, Volume 8, Issue 9,   Pages 49-56

Abstract:

PV/T solar-assisted heat pump system (PV/T-SAHP) was presented in this paper and model of the PV/T-SAHPsystem was made up in this study.that the electrical efficiency and the thermal performance of PV/T-SAHP is better than the traditional heatpump water heater system or the traditional photovoltaic system.angel of PV/T module and the distance of refrigerant pipes are the three key factors of the PV/T-SAHP system

Keywords: solar-assisted heat pump(SAHP)     photovoltaic/thermal system (PV/T)    

Finite element modeling of thermo-active diaphragm walls

Yi RUI, Mei YIN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 646-663 doi: 10.1007/s11709-020-0584-9

Abstract: these problems, since they are a renewable energy technology that uses underground infrastructure as a heat

Keywords: thermo-active diaphragm wall     finite element analysis     thermo-hydro-mechanical coupling     ground source heatpump    

High heat flux thermal management through liquid metal driven with electromagnetic induction pump

Frontiers in Energy 2022, Volume 16, Issue 3,   Pages 460-470 doi: 10.1007/s11708-022-0825-9

Abstract: A high-performance electromagnetic induction pump driven by rotating permanent magnets is designed toThe liquid metal-based minichannel thermal management system was established and tested experimentallyThe results show that the liquid metal cooling system can dissipate heat flux up to 242 W/cm2 with keeping the temperature rise of the heat source below 50°C.power and high heat flux.

Keywords: high heat flux     liquid metal     electromagnetic pump     minichannel heat sink     thermal interface material    

Effects of radiation and heat source/sink on unsteady MHD boundary layer flow and heat transfer over

Krishnendu Bhattacharyya

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 376-384 doi: 10.1007/s11705-011-1121-0

Abstract: In this paper, an investigation is made to study the effects of radiation and heat source/sink on theunsteady boundary layer flow and heat transfer past a shrinking sheet with suction/injection.The thermal boundary layer thickness decreases with Prandtl number, radiation parameter and heat sinkparameter, but it increases with heat source parameter.heat transfer.

Keywords: MHD boundary layer     unsteady flow     heat transfer     thermal radiation     heat source/sink     shrinking sheet     suction    

Exergy analysis of R1234ze(Z) as high temperature heat pump working fluid with multi-stage compression

Bin HU, Di WU, L.W. WANG, R.Z. WANG

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 493-502 doi: 10.1007/s11708-017-0510-6

Abstract: this paper, the simulation approach and exergy analysis of multi-stage compression high temperature heatpump (HTHP) systems with R1234ze(Z) working fluid are conducted.with 120°C pressurized hot water supply based upon waste heat recovery.When the waste heat source temperature is 60°C, the exergy efficiencies increase about 6.9% and 11.8%for the two-stage and three-stage compression system respectively.

Keywords: multi-stage compression     high temperature heat pump     heat recovery     exergy destruction     R1234ze(Z) working    

Title Author Date Type Operation

Optimization model analysis of centralized groundwater source heat pump system in heating season

Shilei LU,Yunfang QI,Zhe CAI,Yiran LI

Journal Article

Water pumping analysis and experimental validation of beach well infiltration intake system in a seawatersource heat pump system

Huan ZHANG,Shu LIU,Xuejing ZHENG,Gaofeng CHEN

Journal Article

Optimisation for interconnected energy hub system with combined ground source heat pump and borehole

Da HUO, Wei WEI, Simon Le BLOND

Journal Article

Performance analysis of an air-source heat pump using an immersed water condenser

Jie JI, Huide FU, Hanfeng HE, Gang PEI,

Journal Article

R&D of the ground-coupled heat pump technology in China

Nairen DIAO, Ping CUI, Junhong LIU, Zhaohong FANG,

Journal Article

Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Journal Article

A solar assisted heat pump drying system for grain in-store drying

Haifeng LI, Yanjun DAI, Jianguo DAI, Xibo WANG, Lei WEI,

Journal Article

Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Journal Article

Novel Radiation-Adjustable Heating Terminal Based on Flat Heat Pipe Combined with Air Source Heat Pump

Yifan Wu,Hongli Sun,Mengfan Duan,Borong Lin,Hengxin Zhao,Chaohung Liu

Journal Article

Numerical study of a hybrid absorption-compression high temperature heat pump for industrial waste heat

Zhiwei MA, Huashan BAO, Anthony Paul ROSKILLY

Journal Article

Dynamic Performance of PV/T Solar-assisted Heat Pump System

Pei Gang,Ji Jie,He Wei,Sun Wei

Journal Article

Finite element modeling of thermo-active diaphragm walls

Yi RUI, Mei YIN

Journal Article

High heat flux thermal management through liquid metal driven with electromagnetic induction pump

Journal Article

Effects of radiation and heat source/sink on unsteady MHD boundary layer flow and heat transfer over

Krishnendu Bhattacharyya

Journal Article

Exergy analysis of R1234ze(Z) as high temperature heat pump working fluid with multi-stage compression

Bin HU, Di WU, L.W. WANG, R.Z. WANG

Journal Article