Search results for "Refrigerants"

showing 3 items of 3 documents

CO2LD: An innovation educational project for High Degree Professional Training in Refrigeration

2013

EN] Refrigeration is one of the technology sectors that has sufered the most changes in the last twenty years, because of the negative impact of the fuids used in the refrigeration cycles, i.e., refrigerants, due to their impact on the ozone layer and their contribution to global warming. As a result of their negative efects, the European Union has established several directives to restrict the use of refrigerant fuids, and the sector therefore needs to adapt to the new regulations. This process of adaptation of the refrigeration sector to the new regulations must be carried out by all the agents involved, including those engaged in the training and education of the future refrigeration tec…

EngineeringHigher educationProcess (engineering)Advanced vocational trainingLow GWP refrigerantslcsh:TechnologyEducationCascade cyclesRefrigerationmedia_common.cataloged_instanceHigh Degree Professional Training RefrigerationOperations managementEuropean unionmedia_commonlcsh:LC8-6691lcsh:Special aspects of educationlcsh:Tbusiness.industryHeat pump and refrigeration cycleProfessional developmentRefrigerationEngineering managementlcsh:TA1-2040restrictVocational educationMAQUINAS Y MOTORES TERMICOSlcsh:Llcsh:Engineering (General). Civil engineering (General)businesslcsh:EducationJournal of Technology and Science Education
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PERFORMANCE EVALUATION OF CASCADE REFRIGERATION SYSTEMS USING DIFFERENT REFRIGERANTS

2012

Due to the negative effects of synthetic refrigerants on the environment, natural refrigerants have obtained again interest as alternative refrigerants for different applications because of their zero ODP and negligible GWP. This paper presents a thermodynamic analysis of different two-stage cascade refrigeration systems using as refrigerant carbon dioxide (R744) in low-temperature circuit, and, respectively, ammonia (R717), propane (R290), butane (R600), R404A, R410A and R134a in high-temperature circuit. The operating parameters considered in this study include condensing and evaporating temperatures in high-temperature circuit, temperature difference in the cascade heat exchanger, and e…

Fluid Flow and Transfer ProcessesMaterials scienceCascade refrigerationRenewable Energy Sustainability and the EnvironmentThermodynamicsButaneRefrigerantchemistry.chemical_compoundchemistryControl and Systems EngineeringCascadePropaneHeat exchangerSettore ING-IND/10 - Fisica Tecnica IndustrialeCascade refrigeration system thermodynamic analysis natural refrigerantsTemperature difference
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A CCHP system fed by low enthalpy sources in Mediterranean area

2018

Climate change and energy consumption increasingly call for a better use of energy sources. Renewable sources are still growing in the power production of many countries, so leading to the reduction of CO2 emissions. Further restrictions will be applied to the use of fossil fuels with a lot of consequences; for example, some German cities are all contemplating bans related to diesel pollution, and on the other hand some of the biggest car producers are planning to stop the diesel engines production in a few years. At the same time, some restrictions are applied also to many refrigerating fluids, in order of limiting the ODP and GWP values. This restriction leads to research new fluids and/o…

Settore ING-IND/11 - Fisica Tecnica AmbientaleORCHeating and powerHydrocarbonRefrigerantsCCHP combined coolingEnergy savingSettore ING-IND/10 - Fisica Tecnica IndustrialeLow enthalpy source
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