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Thermo-economic optimization of small-scale Organic Rankine Cycle: A case study for low-grade industrial waste heat recovery
(Elsevier, 2020-10-01)
This work is focused on a case study of a small-scale Organic Rankine Cycle (ORC) adopted for electricity production from low-grade industrial waste heat recovery. This kind of applications raises a great interest due to ...
Influence of the superheat associated to a semihermetic compressor of a transcritical CO<sub>2</sub> refrigeration plant
(Elsevier, 2010)
This work evaluates, from an energetic point of view, the effects of the superheat caused in the refrigerant by the electric motor cooling (SH<sub>SC</sub>) in a semihermetic compressor installed in an experimental ...
Energy improvements of CO2 transcritical refrigeration cycles using dedicated mechanical subcooling
(Elsevier, 2015-07)
In this work the possibilities of enhancing the energy performance of CO2 transcritical refrigeration systems using a dedicated mechanical subcooling cycle are analysed theoretically. Using simplified models of the cycles, ...
Energy comparison based on experimental results of a cascade refrigeration system pairing R744 with R134a, R1234ze(E) and the natural refrigerants R290, R1270, R600a
(Elsevier, 2023)
Refrigeration architectures for low-temperature applications are gaining interest in the Industrial, Commercial and Health fields. One of the most classical architectures is cascade systems, where two mechanical single ...
Energy influence of the IHX with R22 drop-in and long-term substitutes in refrigeration plants
(Elsevier, 2013-01-10)
This work focuses on the investigation of new drop-in or long-term refrigerants for low evaporating temperatures that can be used as substitutes for HCFC-22, which is gradually being phased-out. This process is already in ...
Experimental analysis of the internal heat exchanger influence on a vapour compression system performance working with R1234yf as a drop-in replacement for R134a
(Elsevier, 2013-09-25)
This paper presents an experimental analysis of the influence of an internal heat exchanger on the performance of a vapour compression system using R1234yf as a drop-in replacement for R134a. In this work, we compare the ...
Experimental study of an R1234ze(E)/R134a mixture (R450A) as R134a replacement
(Elsevier, 2015)
This work presents an experimental analysis of a non-flammable R1234ze(E)/R134a mixture (R450A) as R134a drop-in replacement. While R134a has a high GWP value (1430), the R450A GWP is only 547. The experimental tests are ...
Experimental assessment of R134a and its lower GWP alternative R513A
(Elsevier, 2017-02)
Lower GWP refrigerants are essential to mitigate the impact of refrigeration systems on climate change. HFO/HFC mixtures are currently considered to replace HFCs in refrigeration and air conditioning systems. The aim of ...
Modeling of a PCM TES Tank Used as an Alternative Heat Sink for a Water Chiller. Analysis of Performance and Energy Savings
(MDPI, 2019-09-24)
Phase change materials (PCMs) can be used in refrigeration systems to redistribute the
thermal load. The main advantages of the overall system are a more stable energy performance,
energy savings, and the use of the ...
Optimisation of high-temperature heat pump cascades with internal heat exchangers using refrigerants with low global warming potential
(Elsevier, 2018-12-15)
High-temperature heat pumps (HTHPs) based on vapour compression can be used for industrial
low-grade waste heat valorisation, which can aid in mitigating climate change. Currently, the
performance of HTHPs ...