Results 21 to 30 of about 278,375 (304)

Thermal Four-Pole for Inclusion of Heat Pumps into the Heat Supply System with the CHP [PDF]

open access: yesProblems of the Regional Energetics, 2020
The work deals with district heating systems based on cogeneration plants and the use of carbon dioxide heat pumps in them. Heat pumps are used in heating systems of buildings and use the heat of outdoor air as a source of low potential heat and, at the ...
Sit M.L.   +5 more
doaj   +1 more source

Study of Methods and Development of Technological Scheme for Heat Removal from Rock Waste Dump [PDF]

open access: yes, 2017
The aim of this paper is to study the methods and develop technological scheme for thermal energy removal from coal mine rock waste dumps. The prospects of renewable energy sources development in Ukraine are analyzed.
Saik, Pavlo
core   +1 more source

Evaluation of High-Temperature Heat Pumps’ Potential to Replace Gas Boilers in Industrial Buildings [PDF]

open access: yesE3S Web of Conferences
The study proves that high-temperature heat pumps with CO2 of air to water type, in monobloc construction, can replace the gas boilers for heating and DHW, in an industrial building.
Talaba Ovidiu   +3 more
doaj   +1 more source

Analysis of retrofit air source heat pump performance : results from detailed simulations and comparison to field trial data [PDF]

open access: yes, 2011
In the UK, gas boilers are the predominant energy source for heating in housing, due primarily to the ready availability of natural gas. The take-up of heat pumps has lagged far behind Europe and North America.
Cockroft, J., Kelly, N.J.
core   +1 more source

Dynamic frequency response from controlled domestic heat pumps [PDF]

open access: yes, 2018
The capability of domestic heat pumps to provide dynamic frequency response to an electric power system was investigated. A thermal model was developed to represent a population of domestic heat pumps.
Cheng, Meng   +5 more
core   +2 more sources

Efficiency of using heat pumps with various refrigerants in real steam turbine power units with PT-80 and T-250 turbines [PDF]

open access: yesE3S Web of Conferences, 2019
Prospects for increasing the efficiency of heat and electric energy-generation and heat-and-power supply at thermal power plants obviously draw attention to such modern and innovative technologies as heat pumps.
Sergeyev Vitaliy   +3 more
doaj   +1 more source

Two simple models of classical heat pumps [PDF]

open access: yes, 2007
Motivated by recent studies on models of particle and heat quantum pumps, we study similar simple classical models and examine the possibility of heat pumping.
Dhar, Abhishek   +2 more
core   +3 more sources

Heat Exchanger Network Design Considering the Heat Pump Performance

open access: yesChemical Engineering Transactions, 2014
Setting heat pumps correctly in a heat exchanger network can reduce the consumption of cold and hot utilities simultaneously and further enhance the energy utilization efficiency.
M. Yang, X. Feng, G. Liu
doaj   +1 more source

Residential buildings with heat pumps peak power reduction with high performance insulation [PDF]

open access: yesE3S Web of Conferences, 2020
Revised EPBD directive has set ambitious targets for nearly zero energy buildings. In residential buildings, energy performance can be improved mainly by applying better insulation of building fabric and by efficient energy sources, i.e.
Sarevet Henri   +3 more
doaj   +1 more source

Performance of discrete heat engines and heat pumps in finite time [PDF]

open access: yes, 2000
The performance in finite time of a discrete heat engine with internal friction is analyzed. The working fluid of the engine is composed of an ensemble of noninteracting two level systems.
A. Bejan   +35 more
core   +3 more sources

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