Visualitzant EMC_Articles per títol
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Experimental characterization of an Organic Rankine Cycle (ORC) for micro-scale CHP applications
Elsevier (2015-03-25)This work conducts an experimental characterization of an Organic Rankine Cycle (ORC) module along the operating conditions expected for micro Combined Heat and Power (CHP) applications. For this, a monitored test bench ... -
Experimental comparison between R152a and R134a working in a refrigeration facility equipped with a hermetic compressor
Elsevier (2015-07)The EU Regulation 517/2014 has recently been approved in a further attempt to curb the effects of Global Warming. As a consequence, the refrigeration sector is moving towards refrigerants with a low Global Warming Potential ... -
Experimental comparison of HFO-1234ze(E) and R-515B to replace HFC-134a in heat pump water heaters and moderately high temperature heat pumps
Elsevier (2021-09)Heat pumps are gaining interest to replace fossil fuel burners with the increase of the share of renewable sources in the electricity generation mix. Moreover, low global warming potential (GWP) alternatives offer a ... -
Experimental determination of the optimum intermediate and gas-cooler pressures of a commercial transcritical CO2 refrigeration plant with parallel compression
Elsevier (2021-05-05)CO2 systems used in refrigeration are becoming more complex with the aim of improving their energy performance. Parallel compression is one of the implemented solutions to enhance the performance of the plants. However, ... -
Experimental determination of the optimum working conditions of a transcritical CO2 refrigeration plant with integrated mechanical subcooling
Elsevier (2020-02-05)Subcooling methods for transcritical CO2 plants are being studied in order to improve their behavior. Among them, the Integrated Mechanical Subcooling system is one of the most promising owing that performs with high ... -
Experimental drop-in replacement of R404A for warm countries using the low GWP mixtures R454C and R455A
Elsevier (2018-05)This article presents an analysis of the feasibility of R454C and R455A, two new low global warming potential (GWP of 148) refrigerants, in vapor compression refrigeration systems as alternatives to R404A for warm countries. ... -
Experimental enhancement of a CO2 transcritical refrigerating plant including thermoelectric subcooling
Elsevier (2020-09-02)CO2 is an excellent natural refrigerant that can be used in almost any commercial cooling application thanks to its useful range of evaporative temperatures and excellent environmental properties. However, due to its low ... -
Experimental evaluation of a CO2 transcritical refrigeration plant with dedicated mechanical subcooling
Elsevier (2016-09)CO2 transcritical refrigeration cycles require optimization to reach the performance of conventional solutions at high ambient temperatures. Theoretical studies demonstrated that the combination of a transcritical cycle ... -
Experimental evaluation of a R134a/CO2 cascade refrigeration plant
Elsevier (2014)We present the experimental evaluation of a R134a/CO2 cascade refrigeration plant designed for low evaporation temperature in commercial refrigeration applications. The test bench incorporates two single- stage vapour ... -
Experimental evaluation of a transcritical CO2 refrigeration facility working with an internal heat exchanger and a thermoelectric subcooler: Performance assessment and comparative
Elsevier (2022-08-01)The use of carbon dioxide in transcritical state has become one of the most used solutions to comply with the F-Gas directive and reduce greenhouse gases emissions from refrigeration systems at high ambient temperatures. ... -
Experimental evaluation of an Internal Heat Exchanger in a CO2 subcritical refrigeration cycle with gas-cooler
Elsevier (2015-04-05)We present the experimental evaluation of an internal heat exchanger or suction-line/liquid-line heat exchanger in a CO2 subcritical refrigeration plant with gas-cooler. The plant, driven by a 1.5kW CO2 semi hermetic ... -
Experimental evaluation of CO2/R-152a mixtures in arefrigeration plant with and without IHX
Elsevier Ltd (2024-03-01)In recent years, CO2-based mixtures have been considered as a way to improve the performance of refrigerating plants using pure CO2 as refrigerant. Combining CO2 with a fluid with higher critical temperature generates a ... -
Experimental evaluation of HCFC-22 replacement by the drop-in fluids HFC-422A and HFC-417B for low temperature refrigeration applications
Elsevier (2011-05)The Regulation CE-1005/2009 has banned the use of virgin HCFC-22 in Europe from the 31st December 2009, because it contains chlorine, although its use is allowed up to the 31st December 2014 if it is recycled. Now, ... -
Experimental evaluation of HCFO-1233zd-E as HFC-245fa replacement in an Organic Rankine Cycle system for low temperature heat sources
Elsevier (2016-04-05)In this work an experimental evaluation of the working fluid HCFO-1233zd-E as HFC-245fa replacement in ORC systems for low temperature heat sources has been conducted. A fully monitored ORC module has been used to test ... -
Experimental evaluation of R448A as R404A lower-GWP alternative in refrigeration systems
Elsevier (2015-11)Due to the adoption of EU Regulation No 517/2014, R404A is going to be banned in Europe in most of refrigeration applications, in which is typically used, due to its very high GWP value, 3943. In this paper an experimental ... -
Experimental evaluation of system modifications to increase R1234ze(E) cooling capacity
Elsevier (2017)The GWP limitations are being progressively introduced in Europe through Regulation EU No 517/201, phasing out R134a in most of its refrigeration and air conditioning applications. Pure hydrofluoroolefins are proposed to ... -
Experimental evaluation of the CO2-based mixtures CO2/R32, CO2/R1234yf and CO2/R1270 in a transcritical refrigerating plant considering the effect of the internal heat exchanger (IHX)
Elsevier (2024-01-05)Using CO2 mixtures results in a simple but effective solution to increase the critical temperature of CO2 and reduce its working pressures. However, the overall effect of these mixtures on the global performance of the ... -
Experimental evaluation of the desuperheater influence in a CO2 booster refrigeration facility
Elsevier (2020-03-05)Commercial refrigeration has undergone significant changes in recent years. In the European market, this is mainly due to the F-Gas Regulation (EU 517/2014). F-Gas affects in great measure to commercial centralized ... -
Experimental evaluation of the energy efficiency of a CO2 refrigerating plant working in transcritical conditions
(2008)This work presents the experimental evaluation of the energy efficiency and optimal gas-cooler pressures of a single-stage refrigerating plant working with carbon dioxide as refrigerant in transcritical conditions. The ... -
Experimental Evaluation of the Energy Performance of an Air Vortex Tube when the Inlet Parameters are Varied
Bentham Open (2013)he paper presents the analysis of the energy performance of an air vortex cooling tube under variations of the air inlet properties, with t hree independent experimental tests validated through the energy balance ...