Energetic investigation of solar assisted heat pump underfloor heating systems with and without phase change materials

Khaled

Journal of Energy Storage

et al. 2021

187

Researchers worldwide are investigating thermal energy storage, especially phase change materials, for their substantial benefits in improving energy efficiency, sustaining thermal comfort in buildings and contributing to the reduction of environmental pollution. Residential buildings and commercial constructions, being dependent on heating and cooling systems, are subjected to the utilization of PCM technology through several applications. The current study presents a state-of-the-art review that covers recent literature on thermal energy storage systems utilizing PCMs for buildings. The reviewed applications are heating and hybrid applications, that are categorized as passive and active systems. A summary of the PCMs used, applications, thermo-physical properties and incorporation methods are presented as well. The study emphasizes the promising effectiveness of PCM in building heating applications, and highlights the significance of PCM system hybridization. The study shows that experimental investigations on commercial constructions, and hybrid systems development and optimization, are still required. Finally, possible combinations of active and passive heating applications with their auspicious benefits in terms of energy efficiency augmentation, are recommended. Highlights  State-of-the-art review on PCM building applications for heating and hybrid systems  Active and Passive classification for heating and hybrid systems  Challenges altering the PCM technology for energy-efficient buildings are addressed  Hybridization of active and passive systems forms a potential method toward NZEB

Section: Other Active Applicationsmentioning

confidence: 99%

A review on phase change materials for thermal energy storage in buildings: Heating and hybrid applications

Khaled

Journal of Energy Storage

et al. 2021

187

“…PCM makes it possible to reduce the size of the tank by 2/3 and solves the problem of the insufficient peak heat output of ordinary ground source heat pumps. Plytaria et al [27] designed and simulated a solar-assisted heat pump floor heating system for a building with a floor area of 100 m2. The PCM was placed between the floor and the heating system and different conditions were examined by varying the floor collection area, collector type, and insulation thickness.…”

Section: Phase Change Energy Storage In the Heat Pump Systemmentioning

confidence: 99%

Review on active building energy conservation using phase change materials

et al. 2021

With a increasing application of phase change energy storage technology in the fields of building energy conservation, refrigeration, and air conditioning, the shortcomings of traditional phase change materials (PCMs) have become important, which seriously restricts the development of phase change cold storage technology. Therefore, the new phase change materials have become a research focus in the field of phase change energy storage. The classification and characteristics of phase change materials are briefly described in the paper. In addition, the active building energy-saving are reviewed.

“…Plytaria, M. T. et al combined a solar hot-water system with a radiant floor heating system operated by a heat pump and analyzed the decrease in the energy consumption of the heat pump due to the PCM. It was found through simulation that the electrical energy consumed by the heat pump was 42-67% lower in the floor structure with the PCM than in the floor structure without the PCM [10].…”

Section: Introductionmentioning

confidence: 98%

“…Studies on thermal energy storage systems that combine phase change materials (PCMs) with building structures have been actively conducted to reduce the heating energy consumption in buildings [1]. In particular, studies have been continuously conducted on PCM radiant floor heating systems, which can decrease heating energy by improving the energy performance of existing radiant floor heating systems [2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, it is impossible to apply the existing systems as they are to buildings that use the wet construction method, including concrete and autoclaved lightweight concrete (ALC), and hot water, such as residential buildings in South Korea. Even though a few previous studies introduced systems that use the wet construction method and hot water, the systems used cooling and heating simultaneously or they did not suggest the optimal hot water temperature [4,5,9,10]. As cold water and hot water are used in one coil, the coil or floor structure can be damaged owing to the repeated contraction and expansion of the coil.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Thermal Performance and Energy Saving Potential by PCM Radiant Floor Heating System based on Wet Construction Method and Hot Water

Baek

Kim

2019

Energies

A phase change material (PCM) is an energy storage mass with high heat storage performance. In buildings, PCMs can be utilized to save energy in radiant floor heating systems. This study aims to analyze the thermal performance and energy saving potential by the PCM radiant floor heating system based on wet construction method and hot water. For such analysis, EnergyPlus program was used. As for the results, it was found that the proposed system almost maintained the set point of indoor air and a floor surface. Moreover, when a 10 mm PCM was applied, it was possible to save 2.4% of heating energy annually compared to existing buildings. In particular, when a 20–50 mm PCM was applied, it was found that 7.3–15.3% of heating energy was reduced annually. If indoor air temperature exceeds the comfort range of the proposed system, this problem can be solved by adjusting the set point of the floor surface or by increasing the temperature of hot water.