Improving the performance of air conditioning systems by using phase change materials: A review

Omara, Adil A. M.; Abuelnour, Abuelnour A. A.

doi:10.1002/er.4507

Cited by 62 publications

(27 citation statements)

References 96 publications

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“…They are mainly involved in storing the heat energy. Phase change materials (PCMs) are used in concentrated power plants, solar water heating, solar air heaters, hybrid electric vehicles, electronic cooling, solar thermal cooling, and air conditioning applications . PCMs are not directly used to store electrical energy or with the grid due to thermal energy storage.…”

Section: Significance Of Esss Used With Ressmentioning

confidence: 99%

Limitations, challenges, and solution approaches in grid‐connected renewable energy systems

et al. 2020

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Summary In the modern world, only conventional energy resources cannot fulfil the growing energy demand. Electricity is a fundamental building block of a technological revolution. Today, most of the electricity demand is met by the burning of fossil fuels but at the cost of adverse environmental impact. In order to bridge the gap between electricity demand and supply, nonconventional and eco‐friendly means of energy generation are considered. Renewable energy systems (RESs) offer an adequate solution to mitigate the challenges originated due to greenhouse gasses (GHG). However, they have an unpredictable power generation with specific site requirements. Grid integration of RESs may lead to new challenges related to power quality, reliability, power system stability, harmonics, subsynchronous oscillations (SSOs), power quality, and reactive power compensation. The integration with energy storage systems (ESSs) can reduce these complexities that arise due to the intermittent nature of RESs. In this paper, a comprehensive review of renewable energy sources has been presented. Application of ESSs in RESs and their development phase has been discussed. Role of ESSs in increasing lifetime, efficiency, and energy density of power system having RESs has been reviewed. Moreover, different techniques to solve the critical issues like low efficiency, harmonics, and inertia reduction in photovoltaic (PV) systems have been presented. Unlike most of the available review papers, this article also investigates the impact of FACTS technology in RESs‐based power system using multitype flexible AC transmission system (FACTS) controllers. Three simulation models have been developed in MATLAB/Simulink. The results show that FACTS devices help to maintain the stability of RESs integrated power system. This review paper is believed to be of potential benefit for researchers from both the industry and academia to develop better understanding of challenges and solution techniques for REs‐based power systems and future research dimensions in this area.

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Section: Significance Of Esss Used With Ressmentioning

confidence: 99%

Limitations, challenges, and solution approaches in grid‐connected renewable energy systems

et al. 2020

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“…Omara et al presented a review on the different methods of using phase change materials (PCMs) for improving the performance of air conditioning systems. Wang et al proposed a heat pipe air conditioning (AC) system using heat pipe heat exchanger (HPHE) to realize secondary heat recovery.…”

Section: Introductionmentioning

confidence: 99%

Energy‐efficient hybrid A/C and freshwater production system proposed for high latent load spaces

2019

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Summary Huge amount of energies is consumed by the air conditioning (A/C) to maintain the required temperature and humidity inside spaces/applications of high humidly. An innovative A/C system that recovers the condenser heat in process air reheating and other useful thermal utilization is presented and investigated in this paper. For high coefficient of performance (COP) of the AC and more energy‐efficient system, the cold exhaust air rejected by the air condition system is also utilized to cool the condenser of the AC system. Huge amount of the water condensate from the system is also utilized as freshwater production. Performance of the proposed system is analytically investigated for different operating conditions and system capacities. Mathematical model of the systems is developed and solved numerically using Engineering Equation Solver (EES) software. Results show that the proposed system enhances the COP and decreases the electric power consumption. The saving in electric power consumption, COP, and the freshwater production rate of the system increases with decreasing room‐sensible heat factor, fresh air ratio, and outdoor air temperature and humidity. Moreover, the COP of the proposed system is 90% higher than COP of the basis system, and the savings in the running cost of the system increase by 4.5 times with decreasing the room‐sensible heat factor (RSHF) from 0.6 to 0.2. In addition, the highest COP attained by the proposed system is 2.72, and the corresponding freshwater production rate is 373.8 kg/h.

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“…7 Research and development of integration of solar air heater with thermal energy storage material have become the main focus in the field of solar engineering technology. 10,11 A review study of thermal energy storage integration with solar heaters has been conducted by Haldorai et al 12 From the study, it is concluded that solar heaters with latent heat energy storage material as a thermal energy storage component provide a better thermal efficiency when compared with solar heaters employing other types of thermal energy storage materials. The method of latent heat with the application of phase change material (PCM) has received a special attention because of its higher energy storage density compared with sensible heat energy storage material.…”

Section: Introductionmentioning

confidence: 99%

“…Methods of storing thermal energy including sensible heat and latent heat have been employed. Many solar air heater applications using latent heat energy storage materials such as hydrated salt, 13 palmitic and lauric acid, 14,15 and technical grade paraffin wax 11,12 have been studied. 8,9 It works on the principle where the material itself will store and release an amount of heat when the phase changes during the operation.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on performance of square tube absorber with phase change material

et al. 2019

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The intermittent nature of solar radiation has decreased the performance efficiency of solar heaters. Integrating the solar heater with thermal energy storage component could increase its performance effectively. In this article, an investigation on the effect of phase change material (PCM) as the thermal energy storage component on the performance of square aluminum tube was carried out experimentally. In the first phase, the temperature behavior of square aluminum tube with two types of PCM, namely, generic plant-based PCM (A2) and paraffin wax (A3), was compared with square aluminum tube without PCM (A1). In the second phase, the performance of square aluminum tube was investigated with different paraffin wax masses of 38 g (B1), 48 g (B2), and 58 g (B3). Based on the result, the A3 tube configuration performed better than A1 and A2 tube configurations with higher heat gain rate (0.08°C/s) and lower heat discharge rate (−0.04°C/s). The B2 tube configuration was found to have maximum heat gain of 3.73 kJ with higher heat discharge rate as compared with other square tube configurations. The average temperature difference between internal and external surface tube of B2 was lower (4.3°C) leading to higher average temperature difference at ambient temperature of 25.3°C. Instantaneous efficiency of the tube B2 is higher than the B1 and B3 tube configurations by 16% and 26%, respectively. The result suggests that the insertion of paraffin wax inside the square absorber tube improves the temperature response of the absorber in the situation of intermittent solar radiation. KEYWORDS cross-matrix absorber (CMA), phase change material (PCM), solar energy, thermal energy storage

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Improving the performance of air conditioning systems by using phase change materials: A review

Cited by 62 publications

References 96 publications

Limitations, challenges, and solution approaches in grid‐connected renewable energy systems

Limitations, challenges, and solution approaches in grid‐connected renewable energy systems

Energy‐efficient hybrid A/C and freshwater production system proposed for high latent load spaces

Experimental study on performance of square tube absorber with phase change material

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