Results 311 to 320 of about 397,446 (354)
Some of the next articles are maybe not open access.
High-Temperature Heat Pumps for Sustainable Industry
2021High-temperature heat pumps (HTHPs) based on vapour compression technology are being considered an energy-efficient possibility for low-grade waste heat recovery in industrial applications. If the HTHP technology is extended, the industrial energy efficiency would be closer to the 2050 target of decarbonisation, and consequently, it would reduce the ...
Adrián Mota-Babiloni +2 more
openaire +1 more source
High-temperature heat-pump fluids
Physics in Technology, 1988Heat pumps could be immensely useful in many industrial processes, but standard working fluids are unsuitable for the high temperatures involved. The ideal high-temperature heat-pump fluid should have a high (but not too high) critical temperature, a moderate critical pressure ( approximately=5.0 MPa) and a low (but not too low) boiling point.
openaire +1 more source
Temperature Transformation for High-Temperature Heat Pumps
Journal of Engineering for Gas Turbines and Power, 1988A heat pump cycle is introduced that allows heat pumping between two very high temperature levels, while the suction temperature of the working fluid vapor passing through the compressor is considerably lower. This effect of “Temperature Transformation” is achieved by using a working fluid mixture instead of a single pure component and by employing an ...
R. Radermacher, L. A. Howe
openaire +1 more source
Working fluids for high temperature heat pumps
Journal of Heat Recovery Systems, 1986Abstract The suitability of working fluids for use in high temperature heat pump systems has been considered on the basis of their volumetric and other thremodynamic properties. The change of thermodynamic properties with temperature has been graphically illustrated.
M.A.R. Eisa, R. Best, F.A. Holland
openaire +1 more source
Review Status on High Temperature Heat Pumps
Applied Mechanics and Materials, 2012A heat pump is a kind of energy saving equipment. It can effectively improve the grade of low temperature renewable and waste energy. Because of the increasing demands for higher temperature energy in many industrial processes and other fields, the development and research of high temperature heat pumps have been becoming more and more pressing and ...
Guang Hui Zhou +3 more
openaire +1 more source
Fluids for high temperature heat pumps
International Journal of Refrigeration, 1986Abstract The theoretical performances of some 250 potential work fluids in vapour compression heat pumps condensing at 150°C and evaporating at 100°C have been predicted, using expression for coefficient of performance (COP) and minimum superheat that involve only easily accessible physical properties. Expected correlations were found between COP and
openaire +1 more source
1984
A high-temperature heat pump in compact design using the compression principle with solution cycle is described with respect to its lay-out, operating conditions and energy consumption. In the closed cycle ammonia-water is used as working pair. The installed plant of more than 500 kW heat capacity can be loaded at different temperatures for heat source
openaire +1 more source
A high-temperature heat pump in compact design using the compression principle with solution cycle is described with respect to its lay-out, operating conditions and energy consumption. In the closed cycle ammonia-water is used as working pair. The installed plant of more than 500 kW heat capacity can be loaded at different temperatures for heat source
openaire +1 more source
A High Temperature Lift Absorption Heat Pump
1984Mixtures of alkali-metal hydroxides (principally sodium) with water have been identified as constituting a useful pair for use in an absorption heat pump capable of providing the high temperature lift that is necessary for hydronic domestic heating systems with ambient air as the heat source.
C. O. B. Carey +2 more
openaire +1 more source
Groundwater heat pump selection for high temperature heating retrofit
Energy and Buildings, 2012Abstract Retrofitting of fossil fuel powered hot water radiator heating systems of the existing buildings by groundwater heat pumps can provide significant energy savings followed by economic and environmental benefits. The paper describes the procedure for selection of optimal low-temperature groundwater heat pump vapor compression cycle based on ...
Antonijević, Dragi +3 more
openaire +2 more sources
HIGH TEMPERATURE THERMOACOUSTIC HEAT PUMP [PDF]
, 2012 Thermoacoustic technology can provide new types of heat pumps that can be deployed in dif-ferent applications. A thermoacoustic heat pumps can for example be applied in dwellings to gener-ate cooling or heating. Typically, space and water heating makes up about 60 % of domestics and offices energy consumption.
Spoelstra, S., Tijani, M.E.H.
openaire