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Refrigeration, air conditioning, and heat pumps (RACHP) have an important impact on the final energy uses of many sectors of modern society, such as residential, commercial, industrial, transport, and automotive. Moreover, RACHP also have an important environmental impact due to the working fluids that deplete the stratospheric ozone layer, which are being phased out according to the Montreal Protocol (1989). Last, but not least, high global working potential (GWP), working fluids (directly), and energy consumption (indirectly) are responsible for a non-negligible quota of greenhouse gas (GHG) emissions in the atmosphere, thus impacting climate change.

History of engineering & technology --- demand side management (DSM) --- energy efficiency --- energy storage --- demand response (DR) --- flexibility --- R744 transcritical booster --- subcritical booster --- cascade --- parallel compression --- ejector --- commercial/retail refrigeration --- HVAC --- pressure based control --- damper control --- static pressure reset --- CO2 reset --- demand-based control --- energy saving --- human well-being --- IAQ --- Atomic Air --- air conditioning --- chiller --- CO2 --- commercial refrigeration --- heat pump --- heat recovery --- industrial refrigeration --- R744 --- transcritical vapor-compression system --- two-phase ejector --- domestic refrigerator --- consumer habits --- energy consumption --- good practices --- surveys --- ground source heat pump --- tropical climate --- horizontal heat exchanger --- district cooling --- liquid to compressed natural gas --- thermal energy storage --- LNG --- ground source heat pumps --- low GWP refrigerants --- energy analysis --- R410A --- R32 --- R454B

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Refrigeration, air conditioning, and heat pumps (RACHP) have an important impact on the final energy uses of many sectors of modern society, such as residential, commercial, industrial, transport, and automotive. Moreover, RACHP also have an important environmental impact due to the working fluids that deplete the stratospheric ozone layer, which are being phased out according to the Montreal Protocol (1989). Last, but not least, high global working potential (GWP), working fluids (directly), and energy consumption (indirectly) are responsible for a non-negligible quota of greenhouse gas (GHG) emissions in the atmosphere, thus impacting climate change.

History of engineering & technology --- demand side management (DSM) --- energy efficiency --- energy storage --- demand response (DR) --- flexibility --- R744 transcritical booster --- subcritical booster --- cascade --- parallel compression --- ejector --- commercial/retail refrigeration --- HVAC --- pressure based control --- damper control --- static pressure reset --- CO2 reset --- demand-based control --- energy saving --- human well-being --- IAQ --- Atomic Air --- air conditioning --- chiller --- CO2 --- commercial refrigeration --- heat pump --- heat recovery --- industrial refrigeration --- R744 --- transcritical vapor-compression system --- two-phase ejector --- domestic refrigerator --- consumer habits --- energy consumption --- good practices --- surveys --- ground source heat pump --- tropical climate --- horizontal heat exchanger --- district cooling --- liquid to compressed natural gas --- thermal energy storage --- LNG --- ground source heat pumps --- low GWP refrigerants --- energy analysis --- R410A --- R32 --- R454B

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• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

In recent years, the interest of the scientific community towards efficient energy systems has significantly increased. One of the reasons is certainly related to the change in the temperature of the planet, which has increased by 0.76 °C with respect to preindustrial levels, according to the Intergovernmental Panel on Climate Change (IPCC), and is still increasing. The European Union considers it vital to prevent global warming from exceeding 2 °C with respect to pre-industrial levels, as it has been proven that this will result in irreversible and potentially catastrophic changes. These changes in climate are mainly caused by greenhouse gas emissions related to human activities, and can be drastically reduced by employing energy systems for the heating and cooling of buildings, as well as for power production, characterized by high efficiency levels and/or based on renewable energy sources. This Special Issue, published in the Energies journal, includes 13 contributions from across the world, including a wide range of applications such as hybrid residential renewable energy systems, desiccant-based air handling units, heat exchanges for engine WHR, solar chimney systems, and other interesting topics.

visualization --- numerical and experimental studies --- geothermal energy --- modeling --- dynamic simulation --- spirally corrugated pipe --- ancillary services --- electric energy --- renewables --- batch transportation --- energy and environmental analysis --- energy storage --- microgrids --- optimization --- startup --- solar chimney --- bubble absorber --- tapping --- genetic programming --- plate heat exchanger --- computational fluid dynamics --- absorption cooling --- thermosyphon --- two-phase ejector --- desiccant wheel --- genetic algorithms --- radial ventilation duct --- fluid field --- steelmaking --- ground source heat pump --- fast thermal simulation --- Biot number --- turbo-electric generator --- solar heating and cooling --- exhaust steam --- method of calculation --- model predictive control --- R744 --- dynamic simulations --- linear regression --- crude oil pipeline --- thermal storage --- hygroscopic materials --- melting --- refining --- two-phase flow --- phase change --- heat pump --- hybrid systems --- predictive models --- bentonite buffer material --- backflow --- ground-air heat exchanger --- waste heat recovery --- Ca-type bentonite --- consumption --- protracted fin --- single-channel ventilation --- operating state --- refrigeration --- electric arc furnace --- ammonia-lithium nitrate --- drying --- exhaust emissions --- object-oriented modelling --- body-fitted coordinate-based proper orthogonal decomposition reduced-order model (BFC-POD-ROM) --- transport scheme determination --- analytical and experimental solutions --- thermal conductivity --- low-order model --- heat exchanger --- air-cooled steam turbine generator --- air flow