1. Introduction and background. The main focus of the present work is toward energy use reduction in multi-family residential complexes in cold climates through the optimal use of a geothermal heat pump (GHP) system integrated with a phase-change material (PCM) storage tank.
A tradeoff exists between the energy density (latent heat) and power density (thermal conductivity) for optimal PCM design. Figure 3 A shows the transient boundary heat flux (q″ = f(t)) absorbed by solid-liquid phase change as a function of time (t) when the left boundary superheat reaches 10 K for various boundary conditions …
Phase change material in the latent heat storage unit melted and solidified in 180 and 348 min for air source heat pump system, and 150 and 307 min for solar-assisted heat pump system.
Abstract. Combining phase change thermal storage technology with air-source heat pumps can improve the performance coefficient and stability of air-source heat pumps operating in low-temperature environment. This paper reviews the research progress of phase change thermal storage technology in air-source heat pump system, …
In CSP applications, solar energy is stored as heat for later use. Three main types of thermal energy storage (TES) exist: sensible, latent, and thermochemical. Recently, researchers have focused on latent TES (LTES) due to its advantages compared to the other types of TES, such as the high value of latent heat in phase change …
Phase change material in the latent heat storage unit melted and solidified in 180 and 348 min for air source heat pump system, and 150 and 307 min for solar-assisted heat pump system. This result shows that the melting process accelerates under high solar irradiation, and the total melting time decreases.
Air source heat pumps (ASHPs) dominate the heat pump market, constituting about 60 % of global sales in 2021 [3]. However, they typically exhibit poor low-temperature heating performance and ...
The multi-energy coupled heat storage solar heat pump is the future research direction of the application of phase change heat storage technology in the solar heat pump. It is pointed out that the future development trend is to improve the thermal conductivity of phase change materials, optimize the structure, and strengthen the heat …
Phase change materials (PCMs) having a large latent heat during solid-liquid phase transition are promising for thermal energy storage applications. However, the relatively low thermal conductivity of the …
Between these two, LHS with phase change material (PCM) as TES media has caused great interest among researchers due to its higher energy storage density and smaller temperature variations [7], [8]. It has been widely utilized in many fields such as electronic devices [9], industrial waste heat recovery [10], space heating and …
In this study, we prepared and characterized chloride salts/nanoparticles composite phase change materials (CPCMs) for high-temperature thermal energy storage. The ternary chloride salts (MgCl 2 :KCl:NaCl with 51:22:27 molar ratio) were used as base salt and Al 2 O 3, CuO, and ZnO nanoparticles were dispersed into the base salt …
Integrating thermal energy storage (TES) into the heating systems can help alleviate this problem, by shifting thermal load and thus shaving peaks in the building electric load. …
What. In high-temperature TES, energy is stored at temperatures ranging from 100°C to above 500°C. High-temperature technologies can be used for short- or long-term storage, similar to low-temperature technologies, and they can also be categorised as sensible, latent and thermochemical storage of heat and cooling (Table 6.4).
The current paper presents the design and performance of a high-temperature heat pump (HTHP) integrated in an innovative, sensible, and latent heat storage system. The HTHP has been designed to work between a heat source from 40 to 100 °C and a heat sink above 130 °C.
S mode: The heat pump uses PVT as the low-temperature heat source, and the system operates the solar collector loop. When solar energy resources are abundant, it is necessary to operate the thermal storage loop to store the heat, that is, S s mode. If the user ...
PCM with high heat storage density and small temperature fluctuation range has unparalleled advantages in terms of energy storage, energy supply, and enhanced performance of HP. As the HP coupled PCM technology continues to be explored and deepened, the challenges and the future direction of development need to be …
As one potential solution for the high energy–efficient heating suppliers, the HP responds dynamically to the fluctuating working conditions [9].HP''s real–time coefficient of performance (COP) is found to decline as the …
When CO 2 heat pump is used for space heating, the high return water temperature leads to excessive throttling loss and low efficiency of the heat pump unit. In order to solve this problem, an air-to-water CO 2 heat pump unit combined with phase change thermal storage for space heating was proposed and its feasibility has been …
DOI: 10.1016/j.cej.2022.140701 Corpus ID: 254212131; Review on heat pump (HP) coupled with phase change material (PCM) for thermal energy storage @article{Gu2022ReviewOH, title={Review on heat pump (HP) coupled with phase change material (PCM) for thermal energy storage}, author={Heng Gu and Yuan-yuan Chen and …
This paper focuses on one promising solution among the many paths to electrification: the use of phase change materials (PCM) for compact low-cost thermal energy storage …
The combination of energy-saving heat pump (HP) and phase change material (PCM) with high heat storage density can greatly improve the performance of HP. ... RT 18 HC of 17-19°C phase change ...
Melting and solidification have been studied for centuries, forming the cornerstones of PCM thermal storage for peak load shifting and temperature stabilization. Figure 1 A shows a conceptual phase diagram of ice-water phase change. At the melting temperature T m, a large amount of thermal energy is stored by latent heat ΔH due to …
The PCM has high heat storage density and almost isothermal phase change temperature, which helps to stabilize the heat transfer temperature and …
The high value of energy saving during the summer is mainly contributed to the high-temperature difference between the room setting temperature is 24 °C and the melting range of 17–19 °C for RT 18 HC, which potentially allows this PCM material to store this cold heat during the night and use it in the daytime for cooling purposes.
The performance of phase change energy storage was compared with that of water storage, and the effect of different phase change materials on the system characteristics. The results show that the coupled system achieves a seasonal performance factor of 2.3, a 56 % reduction in energy consumption, and a 27.7 % reduction in operating costs ...
In high-temperature TES, energy is stored at temperatures ranging from 100°C to above 500°C. High-temperature technologies can be used for short- or long-term storage, similar to low-temperature technologies, and they can also be categorised as sensible, latent and thermochemical storage of heat and cooling (Table 6.4).
Shown are two different ways of integrating thermal energy storage in buildings. A thermal battery (powered by a phase-change material) can be connected to a building''s heat pump or traditional HVAC system (left), or the phase-change material can be incorporated inside walls.
The idea is to use a phase change material with a melting point around a comfortable room temperature – such as 20-25 degrees Celsius. The material is encapsulated in plastic matting, and can be ...
The combination of energy-saving heat pump (HP) and phase change material (PCM) with high heat storage density can greatly improve the performance of …
This study proposes a low-global warming potential cascade heat pump system with integrated phase change material (PCM) for combined space heating and cooling. PCM …
The inorganic energy storage material used in this paper was produced by Changzhou Haika Solar Heat Pump Co. Ltd. The phase transition temperature of the material is 47°C; the latent heat of phase change is 480 kJ/L, and the densities of liquid and solid phase change materials are 1.8 g/cm3 and 2 g/cm3, respectively.