Results 21 to 30 of about 599,130 (347)

Draft of the MEPS and HEPS for industrial refrigeration compressor in Thailand

open access: yesEnergy Reports, 2020
This study aimed to find the high energy efficiency standard (HEPS) and minimum energy efficiency standard (MEPS) of industrial refrigeration compressors that suitable for Thailand.
Watcharapong Tachajapong   +2 more
doaj   +1 more source

Effect of Compressor-Discharge-Cooler Heat-Exchanger Length Using Condensate Water on the Performance of a Split-Type Air Conditioner Using R32 as Working Fluid

open access: yesEnergies, 2022
The utilization of condensate water as a compressor-discharge cooler results in subcooling on the condenser outlet. On the other hand, a split-type air conditioner (A/C) with R32 as working fluid can provide higher compressor-discharge temperatures than ...
Kasni Sumeru   +5 more
doaj   +1 more source

IMPROVEMENT OF SYSTEMS OF TECHNICAL WATER SUPPLY WITH COOLING TOWERS FOR STEAM POWER PLANTS TECHNICAL AND ECONOMIC INDICATORS PERFECTION. Part 1

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2016
In order to reduce the temperature of cooling water and increase the efficiency of use of power resources the main directions of modernization of systems of technical water supply with cooling towers at steam power plants are presented.
Yu. A. Zenovich-Leshkevich-Olpinskiy   +2 more
doaj   +1 more source

Comparison of climate and production in closed, semi-closed and open greenhouses [PDF]

open access: yes, 2011
A (semi-)closed greenhouse is a novel greenhouse with an active cooling system and temporary heat storage in an aquifer. Air is cooled, heated and dehumidified by air treatment units. Climate in (semi-)closed greenhouses differs from that of conventional
Dieleman, J.A.   +5 more
core   +2 more sources

Fault Detection Algorithm for Multiple-Simultaneous Refrigerant Charge and Secondary Fluid Flow Rate Faults in Heat Pumps

open access: yesEnergies, 2021
The detection and diagnosis of faults is becoming necessary in ensuring energy savings in heat pump units. Faults can exist independently or simultaneously in heat pumps at the refrigerant side and secondary fluid flow loops. In this work, we discuss the
Samuel Boahen   +4 more
doaj   +1 more source

Energy saving potential of a counter-flow regenerative evaporative cooler for various climates of China: Experiment-based evaluation [PDF]

open access: yes, 2017
© 2017 Recently there has been growing interest in regenerative evaporative coolers (REC), which can reduce the temperature of the supply air to below the wet-bulb of intake air and approach its dew-point.
Chen, Hongbing   +4 more
core   +1 more source

Meeting Global Cooling Demand with Photovoltaics during the 21st Century

open access: yes, 2019
Space conditioning, and cooling in particular, is a key factor in human productivity and well-being across the globe. During the 21st century, global cooling demand is expected to grow significantly due to the increase in wealth and population in sunny ...
Buonassisi, Tonio   +5 more
core   +2 more sources

The analysis of cascade refrigeration machine cycles efficiency using carbon dioxide [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2021
The paper analyzes and proves the feasibility of improving the energy performance of low-temperature refrigeration machines operating on R744 using cascade design with R134a, R1234yf and R717 as refrigerants based on data the scientific study of two ...
A. S. Khrekin   +2 more
doaj   +1 more source

A General Approach in Optimization of Heat Exchangers by Bio-Inspired Artificial Intelligence Methods

open access: yesEnergies, 2019
The paper introduces the artificial intelligence (AI) approach as a general method for the design and optimization study of heat exchangers. Genetic Algorithms (GA) and Artificial Neural Networks (ANN) are applied in the paper.
Jaroslaw Krzywanski
doaj   +1 more source

THE FACTORS INFLUENCING QUALITY OF STRUCTURE OF WORKPIECES PROCESSED ON THE VACUUM LINE «MODULTHERM 7/1»

open access: yesЛитьë и металлургия, 2017
Results of metallographical observations of structural constituent of carburized cases and a core of gears after thermochemical treatment on a vacuum line «ModulTherm 7/1» made by corporation «ALD Vacuum Technologies GmbH» are given.
S. P. Rudenko   +2 more
doaj   +1 more source

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