Results 81 to 90 of about 90,105 (214)

Performance evaluation and optimization guidance for steam generating heat pumps with significant temperature lift

open access: yesCase Studies in Thermal Engineering
Steam generating heat pumps (SGHPs) offer a promising alternative to coal-fired boilers. To address the lack of general optimization strategy of autocascade SGHP (ASGHP) for variable operating conditions and variable cycle configurations, this paper ...
Xudong Ma   +4 more
doaj   +1 more source

Development of a System Identification Model for an Air Source Heat Pump

open access: yes, 2012
Heat pump system can save energy and installation cost and reduces CO2 emissions. In this study, a system identification of an air source heat pump system using R410A with a variable speed compressor was experimentally investigated under various ambient ...
Chang, Youngsoo   +3 more
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Enhanced thermal output from air-source cascade heat pumps configuration for steam generation

open access: yesCase Studies in Thermal Engineering
Steam generating heat pumps (SGHPs) present a promising solution for replacing coal-fired boilers and advancing industrial decarbonization by utilizing waste heat to produce high-temperature steam.
Xudong Ma   +4 more
doaj   +1 more source

Remote temperature mapping of high-power InGaN/GaN MQW flip-chip design LEDs

open access: yes, 2005
We report on the study of heat 2D-distribution in InGaN LEDs with the stress made on local device overheating and temperature gradients inside the structure.
Zakheіm А. L.   +3 more
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Investigation on Thermodynamic Performance of a Double-Acting Traveling-Wave Thermoacoustic Heat Pump for High-Temperature Range

open access: yesZhileng xuebao, 2012
The paper proposes a novel thermoacoustic heat pump and uses the DeltaEc code to simulate the thermodynamic performance of a double-acting traveling-wave thermoacoustic heat pump for high-temperature range.
Tong Huan, Luo Ercang
doaj  

Characteristics Of R718 Thermocompression Refrigerating / Heat Pump Systems With Two-Phase Ejectors

open access: yes, 2012
The paper describes the investigations of the R718 thermocompression refrigerating cycle with two-phase ejector as a compression device. The complex thermal and flow phenomena connected with compression and condensation inside the two-phase ejector flow ...
Sarevski, Vasko Nikola   +1 more
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Two-Phase Flow Performance Of A Heat Transport Pump

open access: yes, 1997
Lecturepg. 69Heat transport pumps in Canadian deuterium uranium reactor circulate coolant to remove fuel decay heat from the reactor core during normal and accident conditions. A loss-of-coolant-accident is one condition where heat transport pumps play a
Samarasekera, H.
core   +1 more source

Theoretical and Experimental Investigation on R245fa High-temperature Water Steam Heat Pump System

open access: yesZhileng xuebao, 2018
High-temperature steam is in great demand for many industrial applications. The electric boilers used to replace traditional boilers in rural areas are not efficient enough to be employed in large-scale steam production.
Zhao Zhaorui   +3 more
doaj  

Research on new cooling and waste heat utilization methods of liquid ring vacuum pump for coal mine gas extraction

open access: yesMeikuang Anquan
The high temperature of gas drainage liquid ring vacuum pump is an important reason for its low operating efficiency and short service life. Based on the wasted power dissipation theory of liquid ring pumps, the heat generation-heat dissipation mechanism
Yanmin WANG   +5 more
doaj   +1 more source

Experimental Investigation of the Effect Of Zeolite Coating Thickness on the Performance of a Novel Zeolite-Water Adsorption Heat Pump Module [PDF]

open access: yes, 2010
A novel zeolite-water absorption heat pump module comprising an adsorber, an evaporator and a condenser heat exchanger as well as a module non-return valve in a hermetically sealed vessel is introduced.
Hofle, P., Dawoud, B., Chmielewski, S.
core  

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