Results 41 to 50 of about 5,061 (219)
Review of experimental research on supercritical and transcritical thermodynamic cycles designed for heat recovery application [PDF]
, 2019 Supercritical operation is considered a main technique to achieve higher cycle efficiency in various thermodynamic systems. The present paper is a review of experimental investigations on supercritical operation considering both heat-to-upgraded heat and
De Paepe, Michel +6 more
core +2 more sources
Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 1, January/February 2026.ABSTRACT This study investigates binary zeotropic mixtures of R744 (CO₂) blended with eco‐friendly refrigerants for medium‐high temperature heat pumps, comparing them with conventional R744/R134a systems. All mixtures meet 60–80 K temperature lift requirements under low‐temperature conditions. A genetic algorithm optimized system parameters using fixed
Lingling Sun +6 more
wiley +1 more source
Выбор эксплуатационных параметров и хладагента для парокомпрессорных воздушных тепловых насосов [PDF]
, 2016 Энергетическая эффективность парокомпрессорных тепловых насосов (ТН) определяется параметрами теплоты источника низкой температуры и потребителя высокой температуры, а также применяемым рабочим веществом.
Володин, Виктор Иванович +1 more
core
Simulation study of a heat pump for simultaneous heating and cooling coupled to buildings [PDF]
, 2014 International audienceIn several situations, a heat pump for simultaneous heating and cooling (HPS) can be installed advantageously in buildings where simultaneous needs occur. Unlike a reversible heat pump that works alternatively in heating or cooling,
Bazantay, Frederic +3 more
core +3 more sources
Thermodynamic screening of alternative refrigerants for R290 and R600a
Results in Engineering, 2020 Due to Regulation EU 517/2014 (F-Gas), the use of refrigerants with GWP higher than 150 was limited from 2015 on in small capacity refrigeration systems in Europe. Although refrigerants that dominate are R600a and R290 nowadays, which are classified as A3 by ASHRAE 34, literature points out that some refrigerant mixtures exist that could offer benefits
Daniel Calleja-Anta +5 more
openaire +3 more sources
Experimental study of R290/R600a mixtures in vapor compression refrigeration system
International Journal of Refrigeration, 2022 Abstract This paper presents an experimental investigation of the effect of R290/R600a refrigerant mixtures on the performance of variable speed hermetic compressors used in household refrigeration. In this context, a small-capacity compressor test stand is introduced and four different compositions of R290/R600a mixtures are studied in detail.
Mustafa Ozsipahi +3 more
openaire +2 more sources
The FEBS Journal, Volume 293, Issue 1, Page 196-219, January 2026.We revealed the crystal structure of eKatE from atypical E. coli. eKatE exhibits a hydrogen‐peroxide‐sensitive major channel, a stabilized dimeric interface, an unusual covalent bond between C392 and Y415, and other distinctive features. These structural features contribute to its enhanced catalase activity compared to KatE in typical E.
Eunhee Koh +7 more
wiley +1 more source
State of Art on ORC Applications for Waste Heat Recovery and Micro-cogeneration for Installations up to 100kWe [PDF]
, 1976 The growing cost for energy production and distribution as well as problems related to environmental pollution have induced an increasing interest in the research of alternative solutions and in particular innovative technologies capable of compromising ...
Obi, John Besong
core +1 more source
Annals of Neurology, Volume 98, Issue 3, Page 561-572, September 2025.Objective A growing body of evidence indicates a strong genetic overlap between developmental and epileptic encephalopathies (DEEs) and movement disorders. De novo loss‐of‐function variants in NUS1 have been recently identified in DEE cases. Herein, we report a large cohort of cases with pathogenic NUS1 variants and describe their clinical presentation
Sarah M. Brooker +79 more
wiley +1 more source
Investigation on the Miscibility of Lubricants with Natural Refrigerant R290
Zhileng xuebao, 2013 In order to explore the miscibility of lubricants with the natural refrigerant R290, an experimental device was established. The miscibility of naphthenic oil, paraffinic oil, polyol ester, polyalkylene glycol and alkylbenzene with the natural ...
Yang Ruijie +5 more
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