Showing 1 - 10 of 16
A novel air-gap-lens-walled compound parabolic concentrator incorporated with photovoltaic/thermal system (ALCPC-PV/T) was proposed. The optical, electrical and thermal performances of the ALCPC-PV/T under the outdoor condition were analyzed for building integrated concentrating...
Persistent link: https://www.econbiz.de/10011263287
Energy crisis and environment deterioration are two major problems for 21st century. Thermoelectric device is a promising solution for those two problems. This review begins with the basic concepts of the thermoelectric and discusses its recent material researches about the figure of merit. It...
Persistent link: https://www.econbiz.de/10011208405
The receiver’s back surface radiative characteristics of a heat-pipe evacuated-tube solar collector (ETSC) may have a significant influence on its performance. This influence is generally related to the back surface emissivity and temperature; however it has been not studied previously. This...
Persistent link: https://www.econbiz.de/10011041102
This paper presents theoretical investigations into a hybrid ejector and CO2 vapour compression (VC) system for road transport cooling. The purpose is to utilise the waste heat from exhaust gas and the VC sub-system to drive the ejector system, whose cooling effect will be employed to subcool...
Persistent link: https://www.econbiz.de/10011040703
A naturally-controlled organic Rankine cycle (ORC) without negative work is proposed. Compared with conventional ORCs, the novel system uses gravity instead of a pump to pressurize the working fluid, and hence the problems associated with the pump can be avoided. A possible application of the...
Persistent link: https://www.econbiz.de/10011040478
The electricity conversion-efficiency of a solar cell for commercial application is about 6-15%. More than 85% of the incoming solar energy is either reflected or absorbed as heat energy. Consequently, the working temperature of the solar cells increases considerably after prolonged operations...
Persistent link: https://www.econbiz.de/10008913741
A novel heat pump system is proposed in that the PV/T collector is coupled with a solar assisted heat pump and works as an evaporator. The cooling effect of the refrigerant allows the PV modules to work at lower temperature and so its photovoltaic efficiency is improved. Mathematical model has...
Persistent link: https://www.econbiz.de/10008916484
A flat-box aluminum-alloy photovoltaic and water-heating system designed for natural circulation was constructed. The hybrid photovoltaic/thermal (PV/T) collector was an integration of single-crystalline silicon cells into a solar thermal collector. The product was able to generate electricity...
Persistent link: https://www.econbiz.de/10008918985
The working principles and the basic features of a multi-functional domestic heat-pump (MDHP) system are introduced in this paper. Comparatively, the system can provide much better energy performance and higher equipment utilization throughout a year, causes less thermal pollution than the...
Persistent link: https://www.econbiz.de/10008919938
This paper describes a solar heat pipe thermoelectric generator (SHP-TEG) unit comprising an evacuated double-skin glass tube, a finned heat pipe and a TEG module. The system takes the advantage of heat pipe to convert the absorbed solar irradiation to a high heat flux to meet the TEG operating...
Persistent link: https://www.econbiz.de/10010572053