An investigation of the solar powered absorption refrigeration system
Highlights The Variable Mass Energy Transformation and Storage (VMETS) technology is introduced into the solar powered absorption refrigeration field. It can effectively shift the loads between solar radiation and air conditioning. With the VMETS technology, more solar energy can be used in the systems for cooling, heating or
A new compressed air energy storage refrigeration system
The schematic of the compressed air energy storage refrigeration system is shown in Fig. 1. During the period of energy storage, cut-off valve 5 is open while valve 7 is closed. Air is compressed by an air compressor 1 and then enters a cooler 2 with high temperature and high pressure.
Design and optimization of high-density cryogenic supercritical
To address the low density of high-pressure gaseous hydrogen and evaporation issues associated with liquid hydrogen storage, cryogenic supercritical hydrogen storage method is presented in this paper.Based on a dual parallel mixed refrigerant cycle (DPMR) and a dual cascade mixed refrigerant cycle (DCMR), the
The Energy Storage Properties of Refrigerants (R170, R134a,
Abstract. The thermophysical properties of refrigerant can be modified via adding solid materials to it. In this paper, molecular simulations and thermodynamic calculations were employed to investigate the adsorption and energy storage of ethane (R170), 1,1,1,2-tetrafluoroethane (R134a), 1,1,1-trifluoroethane (R143a), and 1,1
Potential of latent thermal energy storage for
Over the past two decades, latent thermal energy storage has been a proven technology to improve the performance of refrigeration appliances. In this work, an up to date literature review is presented on the application of latent thermal energy storage into small-scale refrigeration systems, including domestic refrigerators, beverage
Refrigerant-based thermal energy storage and cooling system
Disclosed is a method and device to increase the cooling load that can be provided by a refrigerant-based thermal energy storage and cooling system with an improved arrangement of heat exchangers. This load increase is accomplished by circulating cold water surrounding a block of ice, used as the thermal energy storage medium, through
Thermodynamic analysis of high-temperature pumped thermal energy
The results show that for a system that employs the same refrigerant in both the HTHP and ORC, and for a latent heat thermal energy storage system at 133ºC, R-1233zd(E) and R-1234ze(Z) present
Coupling thermodynamics and economics of liquid CO2 energy storage
Coupling thermodynamics and economics of liquid CO2 energy storage system with refrigerant additives. December 2023. Energy 284:128642. DOI: 10.1016/j.energy.2023.128642. Authors:
Cryogenic heat exchangers for process cooling and renewable energy
Another industrial application of cryogenics, called Liquid Air Energy Storage (LAES), has been recently proposed and tested by Morgan et al. [8]. LAES systems can be used for large-scale energy storage in the power grid, especially when an industrial facility with high refrigeration load is available on-site.
Thermodynamic analysis of high-temperature pumped thermal
Thermodynamic analysis of high-temperature pumped thermal energy storage systems: Refrigerant selection, performance and limitations. A. Hassan, Laura
Performance evaluation of a combined variable refrigerant
Performance analysis of a proposed newly combined VRV-CTES A/C system is presented. • Integration of VRV with CTES improved the operational performance of the system.. High latent heat (160.81 kJ kg −1) of PCM is attributed for CTES energetic performance.. Reduction of cooling capacity and combined power consumption are quite
Performance evaluation of a combined variable refrigerant volume and cool thermal energy storage
Thermal energy storage, especially latent heat energy storage based on phase change material (PCM), is one of the most promising players in energy storage. Compared with traditional sensible heat energy storage, PCM energy storage is based on its phase change process, which has the advantages of high energy density [2], low
Performance evaluation of a combined variable refrigerant
The experimental system mainly comprised a direct expansion (DX) variable refrigerant volume plant, variable air-distribution sub-system and a packed-bed PCM-based cool thermal energy storage module. The major components in the DX refrigerant plant include a variable speed rotor compressor (VSC) and an Electronics Expansion Valve
The Energy Storage Properties of Refrigerants (R170, R134a, R143a, and R152a) in Mof-5 Nanoparticles: A Molecular Simulation Approach
The thermal energy storage capacity of the refrigerant/MOF-5 mixture is larger than that of the pure refrigerant at low pressure. Also, the negative enhancement of the energy storage property of the mixture is
Energy storage comparison of sorption systems for cooling and refrigeration
1.. IntroductionEver since the first oil crisis, energy storage has been an important issue. It is a great challenge especially as far as cooling is concerned because this technology now represents a large part of energy consumption in developed countries (Guéroult et al., 1998).When a quasi-free source of energy such as solar energy is
Refrigeration | energy.gov
PCM store a large amount of energy for heating, cooling or refrigeration by melting/freezing at a specific temperature. PCM thermal energy storage, together with a refrigeration system, can be used to store energy generated by solar PV. The market is implementing storage strategies with rooftop solar that can reduce or eliminate peak
An investigation of the solar powered absorption refrigeration system with advanced energy storage
Highlights The Variable Mass Energy Transformation and Storage (VMETS) technology is introduced into the solar powered absorption refrigeration field. It can effectively shift the loads between solar radiation
Thermodynamic analysis of high-temperature pumped thermal
Pumped thermal energy storage (PTES) is a very recent technology that can be a promising site-independent alternative to pumped hydro energy storage or
Performance enhancement of air conditioning using thermosyphon system''s energy storage unit for cooling refrigerant
This research focused on application of a heat transfer device, a Thermosyphon system energy storage unit (TSES unit), to air conditioning systems. The aim was to experimentally investigate use of the TSES unit to provide energy savings and enhance the heat transfer of the refrigerant. The TSES unit was installed between the
Coupling thermodynamics and economics of liquid CO2 energy
Pioneering research is carried out on a liquid CO 2 energy storage system with refrigerant additives in this work. By coupling thermodynamic and economic
Design and optimization of high-density cryogenic supercritical
Nonetheless, it suffers from drawbacks such as low hydrogen storage density and energy loss during the compression process [10]. In contrast, liquid hydrogen storage boasts an impressive hydrogen storage density of up to 70.8 kg/m 3, offering a high-density hydrogen storage method. However, due to the extremely low boiling point
Thermodynamic analysis of high-temperature pumped thermal energy storage systems: Refrigerant
The latter combines both latent and sensible heat thermal energy storage sub-systems to maximize the advantage of the refrigerant subcooling. After validating the proposed model, several parametric studies have been carried out to assess the system performance using different refrigerants and configurations, under a wide range of source and sink
Thermal Energy Conversion and Storage
The study line Thermal Energy Conversion and Storage provides the student with specialist knowledge both within sustainability and physics with emphasis on engineering thermodynamics. The study line covers the following areas: mechanical energy, sustainable power generation, heat pumps, refrigeration systems, energy storage, power-2-x
Thermodynamic analysis of high-temperature pumped thermal energy
A simple thermodynamic model is formulated that predicts the efficiency of PHES as a function of the temperature of the thermal energy storage at maximum output power and predicts that for storage temperatures above 400 °C PHES has a higher efficiency than existing CAES and that PHES can even compete with the efficiencies
Molecular Simulations of Adsorption and Energy
The refrigerant circulation heat can be enhanced through the mutual transformation between thermal energy and surface energy
The Energy Storage Properties of Refrigerants (R170, R134a,
investigate the adsorption and energy storage of ethane (R170), 1,1,1,2-tetrafluoroethane (R134a), 1,1,1-trifluoroethane (R143a), and 1,1-difluoroethane (R152a) in metal organic framework (MOF
Dynamic characteristics and optimizations of the
A combined cold and power system with an integrated advanced adiabatic compressed air energy storage system and double-effect compression-absorption refrigeration using [mmim]DMP/CH 3 OH as working fluid (CACAR) was proposed. The CACAR system can use the heat generated by the compression process and the cooling
Coupling thermodynamics and economics of liquid CO2 energy storage
A CO2 mixtures energy storage system without cold storage in the charge period is designed. A comprehensive model and evaluation index that couple the system thermodynamics and economics are established, which is performed in an in-house code. The screened refrigerant additives of R32, R1270, R290, R161, R600a and R600 are
Understanding the Refrigeration Cycle : A Guide to Cooling
Medical and Pharmaceutical Storage: Keeping critical medical supplies and medications at stable temperatures to ensure potency and efficacy. This energy absorption increases the kinetic energy of the refrigerant''s molecules, breaking the intermolecular forces that hold the liquid together, thus causing a phase change into a gaseous state.
Meet DOE''s Newest Research Projects from BENEFIT 22-23
Copeland, Ohio – Multifunctional HVAC Platform with Modular Thermal Storage – Copeland will connect an outdoor heat pump charged with propane (a low global warming potential refrigerant) with plug-and-play thermal energy storage modules to create an integrated residential HVAC platform for cooling, heating, and water heating,
Design and experiment research of the liquid accumulator in
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Refrigerant-based thermal energy storage and cooling system
An embodiment of the present invention may comprise a refrigerant-based thermal energy storage and cooling system comprising: a condensing unit, the condensing unit comprising a compressor and a condenser; a refrigerant management unit connected to the condensing unit, the refrigerant management unit that regulates, accumulates and
The Energy Storage Properties of Refrigerants (R170, R134a,
The thermophysical properties of refrigerant can be modified via adding solid materials to it. In this paper, molecular simulations and thermodynamic calculations were employed to investigate the adsorption and energy storage of ethane (R170), 1,1,1,2-tetrafluoroethane (R134a), 1,1,1-trifluoroethane (R143a), and 1,1-difluoroethane (R152a)
Refrigerant-based thermal energy storage and cooling system
A method and apparatus are disclosed for increasing the cooling that can be provided by a refrigerant-based thermal energy storage and cooling system with an improved arrangement of the heat exchanger. Such increased load is achieved by the water surrounding the ice mass which is to be used as thermal energy storage medium, via
Energy storage systems for refrigerated warehouses
When the warehouse temperature is below -2oC, the refrigerated system still works to charge the energy storage system. During daytime, the stored cold energy is primarily used to provide the cooling demand of the warehouse. The refrigerated system only starts when the indoor temperature is over 5oC in warehouse.
Review on cold thermal energy storage applied to refrigeration
Table 1 gives an overview of the important properties of the most commonly used types of PCMs for CTES in the temperature range from 0 °C to −62 °C. Generally, the inorganic PCMs have higher thermal conductivity and larger heat storage capacity than the organic PCMs. But their main drawbacks are that they suffer from a high degree of
Energies | Free Full-Text | Thermodynamic Analysis of
In this work, a novel concept that applies the principle of the auto-cascade refrigeration cycle to store cold energy is conducted. The environment-friendly refrigerants of R600a/R290/R170 zeotropic
Design of a cold thermal energy storage unit for industrial applications using CO2 as refrigerant
Cold Thermal Energy Storage (CTES) technology can be introduced to refrigeration systems for air conditioning and process cooling to reduce the peak power consumption by decoupling the supply and
A new compressed air energy storage refrigeration system
Wang et al. [4] performed a thermodynamic and economic analysis of a novel compressed-air energy-storage refrigeration system; the system was a combination of a gas refrigeration cycle and a
Performance evaluation of a combined variable refrigerant volume and cool thermal energy storage
The experimental system mainly comprised a direct expansion (DX) variable refrigerant volume plant, variable air-distribution sub-system and a packed-bed PCM-based cool thermal energy storage module. The major components in the DX refrigerant plant include a variable speed rotor compressor (VSC) and an Electronics Expansion Valve
Coupling thermodynamics and economics of liquid CO2 energy storage
Compressed gas energy storage has been applied as a significant solution to smooth fluctuation of renewable energy power. The utilization of CO2 as working fluid in the energy storage system is restri Zhan, 2023. "Coupling thermodynamics and economics of liquid CO2 energy storage system with refrigerant additives," Energy, Elsevier, vol
Experimental characterisation of a cold thermal energy storage
At this point, energy storage is carried out through a sensible energy storage process until the temperature of the ice block approaches the inlet refrigerant temperature. In the tests, the end of the charging cycle is that corresponding to a temperature difference between the mean value of the last-placed TC on each
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