Results 61 to 70 of about 90,105 (214)

Cycle Analysis of Heating and Refrigeration in New Air-source Heat Pump

open access: yesZhileng xuebao, 2005
An air source heat pump operating in cascade cycle way was presented. The new-type heat pump can operate not only in a single-stage cycle, but also in a cascade cycle. The operation performance of the heat pump was stimulated.
王林, 陈光明, 陈斌, 王勤
doaj   +2 more sources

两级冷凝热泵热水系统的实验研究

open access: yesZhileng xuebao, 2010
When an air source heat pump water heater runs at higher water temperature,the power input and the discharge temperature of its compressor are high,leading to problems of security and stability,and the significant decrease of the system efficiency.In our
江明旒   +4 more
doaj  

High-temperature industrial heat pump. Management plan [PDF]

open access: yes, 1979
The management plan for the development and demonstration of a high-temperature industrial heat pump for milk drying is presented. Section 2 describes the overall objective, technical approach, and program scope for development and demonstration of a heat pump system for use in an existing milk drying operation.
openaire   +2 more sources

Domestic Heat Pump System With Solar Thermal Collectors as Heat Source and Annual Ice Storage

open access: yes, 2012
Aim of this paper is a theoretical and experimental investigation of a domestic heating system with heat pump using solar thermal collectors as the only heat source.
Gschwend, Andreas, Bertsch, Stefan S.
core  

Energy from Waste: Reuse of Compost Heat as a Source of Renewable Energy [PDF]

open access: yes, 2010
An in-vessel tunnel composting facility in Scotland was used to investigate the potential for collection and reuse of compost heat as a source of renewable energy.
E. R. Lamont   +5 more
core   +1 more source

Technology Development and Performance Improvement of CO2 Automobile Heat Pump Air-conditioning System

open access: yesZhileng xuebao, 2018
This study develops a set of CO2 transcritical automobile heat pump air-conditioning systems, which adopts a CO2 vehicle electrical compressor, micro-channel heat exchanger, electronic expansion valve and other key components.
Wang Dandong   +5 more
doaj  

Energy Optimization for Transcritical CO2 Heat Pumps for Combined Heating and Cooling and Thermal Storage Applications

open access: yes, 2012
A transcritical heat pump (THP) cycle using carbon dioxide (CO2) as the refrigerant is known to feature an excellent coefficient of performance (COP) as a thermodynamic system.
Yazawa, Kazuaki   +3 more
core  

Comprehensive study of high temperature heat pump configurations: A framework of performance and application

open access: yesEnergy
High temperature heat pumps (HTHPs) are essential technology for the electrification of industrial thermal processes. However, their widespread deployment is conditioned by the development of a framework for selecting the optimal HTHP configuration and refrigerant.
Maja Sharevska   +6 more
openaire   +1 more source

New Correlations for the Air-Side Heat Transfer Coefficient of Microchannel Heat Exchangers Under Quasi-Steady State Frosting Operating Conditions

open access: yes, 2012
This study experimentally investigated the frost growth on louvered folded fins in outdoor microchannel heat exchangers used in air-source heat pump systems.
Cremaschi, Lorenzo   +2 more
core  

Air and Water Flowrate Optimisation for a Fan Coil Unit in Heat Pump Systems

open access: yes, 2012
The degradation in efficiency of auxiliary components in heating/cooling systems when operating at part load is frequently reported. Through the use of variable speed components, the supplied capacity can be reduced to match the required load and hence ...
Kilian, Edwards, Finn, Donal P.
core  

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