Experimental study and performance analysis of a solar thermoelectric air conditioner with hot water supply

In recent years, global environmental problems and energy crisis are highly regarded. The research and development of new energy sources and energy saving are two key ways to solve the potential global energy shortage. The solar energy is important for its cleanliness and unexhausting. The solar water heaters are widely used in domestic hot water supply. The former natural cycle system had a lower performance of heat collection, insulation and convenience as well as conflict with architecture. It is necessary to develop a new style solar water heater in north china. This paper presents an forced circulation solar hot water supply system with spiral copper coil as heat exchanger in heat storage tank and plate solar collectors. It has high collection efficiency and it is consistent with the architecture. The system is full of antifreeze to solve the freezing problem in north china. The experimental study was conducted for solar hot water supply system. The experimental results indicate that the forced circulation solar hot water supply system has superior performance of heat collection and heat transfer. The average heat output is respectively 2.82kWh/m2 in spring, 3.13 kWh/m2 in summer and 2.73 kWh/m2 in autumn. The hot water output is respectively75.3L/m2.d in spring, 81.2 L/m2.d in summer and 56.5 L/m2.d in autumn if the temperature difference is 28°C.In addition, by use of the experimental measured data the long-term thermal performance can be forecast.

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Air source thermoelectric heat pump for simultaneous cold air delivery and hot water supply: Full modeling and performance evaluation

Renewable Energy ◽

10.1016/j.renene.2018.07.007 ◽

2019 ◽

Vol 130 ◽

pp. 968-981 ◽

Cited By ~ 13

Author(s):

Yang Cai ◽

Dong-Dong Zhang ◽

Di Liu ◽

Fu-Yun Zhao ◽

Han-Qing Wang

Keyword(s):

Performance Evaluation ◽

Water Supply ◽

Heat Pump ◽

Hot Water ◽

Cold Air ◽

Hot Water Supply ◽

And Performance ◽

Thermoelectric Heat Pump ◽

Thermoelectric Heat

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HOUSING PRESSURE REGULATOR WITH IMPROVED WATER-SAVING CHARACTERISTICS

URBAN CONSTRUCTION AND ARCHITECTURE ◽

10.17673/vestnik.2019.01.10 ◽

2019 ◽

Vol 9 (1) ◽

pp. 57-63

Author(s):

Alexander K. STRELKOV ◽

Yury N. ZOTOV ◽

Irina Yu. MIKHAYLOVA

Keyword(s):

Experimental Study ◽

Water Supply ◽

Water Saving ◽

Hot Water ◽

Public Water Supply ◽

Pressure Regulator ◽

Water Losses ◽

Apartment Buildings ◽

Hot Water Supply

The issues related to the problem of reducing unproductive water losses in the systems of cold and hot water supply of apartment buildings are considered in the article. The insufficient efficiency of application of known water saving devices, reducing overhead costs, the cause of which is the contradiction between the requirements of rationality and ensuring the maximum demand for a public water supply service, is shown. The recommendations for improving the design of the piston apartment pressure regulator “after itself”, ensuring a reduction in nonproductive costs are developed. The results of an experimental study of a pressure regulator with an improved water saving characteristic are presented.

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