Numerical and outdoor real time experimental investigation of performance of PCM based PVT system

Fayaz, H.; Rahim, N.A.; Hasanuzzaman, M.; Rivai, Ahmad; Nasrin, Rehena

doi:10.1016/j.solener.2018.12.057

Cited by 148 publications

(25 citation statements)

References 36 publications

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“…Their simulation results presented that the PV/T-PCM system have lower surface temperature compared to PV/T system, and as the thermal conductivity of PCM enhances, both electrical and thermal efficiencies increase. Fayaz et al (Fayaz et al, 2019) investigated the PCM based PV/T system, and the experimental validation was carried out to verify the numerical model. They found that the electrical efficiency is achieved as 13.98% and 13.87% numerically and experimentally respectively, and the electrical performance is improved as 6.2% and 4.8% for PV/T-PCM system based on the numerical and experimental results respectively.…”

Section: *Marked Revised Manuscript Click Here To View Linked Referencesmentioning

confidence: 99%

Performance analysis of solar assisted heat pump coupled with build-in PCM heat storage based on PV/T panel

Yao

Dai

et al. 2020

Solar Energy

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PV/T (photovoltaic/thermal) technology is a combination of PV module (photovoltaic utilization) and collector (photothermal utilization), which can improve the comprehensive utilization efficiency of solar energy and has a broad application prospect. In this paper, PV/T module is coupled with heat pump evaporator to form a direct-expansion solar PV/T heat pump which is suitable for heat application in high latitude area. To achieve stable residential heating, a solar PV/T heat pump system coupled with build-in PCM (phase change material) heat storage is therefore proposed and simulated. Meanwhile, the mathematical model of solar PV/T heat pump coupled with build-in PCM heat storage system is established and verified. The simulation results show that the temperature of underfloor heating which using build-in PCM heat storage can reach 22 ℃ to 31 ℃ after 39 hours when the circulating water is 40 ℃. Moreover, the heating COP (Coefficient of Performance) increases with the increase of solar radiation, ambient temperature and area of PV/T collector, and decrease of wind speed, respectively. A 20 m2 PV/T panel module can output 21.4% of the electricity to power grid when the solar radiation intensity is 600 W/m2 and meet the heat demand of a 100 m2 room while maintain the operation of the system. Meanwhile, the heating COP can reach 5.79 which is 70% higher than the conventional air conditioning system and the electrical, thermal, overall efficiencies are 17.77%, 55.76% and 75.49%, respectively. Highlights A solar assisted heating/power generation system based on PV/T panel is proposed for residential heating in high latitude area.

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Section: *Marked Revised Manuscript Click Here To View Linked Referencesmentioning

confidence: 99%

Performance analysis of solar assisted heat pump coupled with build-in PCM heat storage based on PV/T panel

Yao

Dai

et al. 2020

Solar Energy

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“…The electrical efficiency of PV/T-PCM collector was 12.59% for numerical and 12.75% for experimental. Fayaz et al (Fayaz et al, 2019b) tested the electrical performance of PV/T collector systems by using PCM numerically and experimentally. In the results obtained, the electrical efficiency values of the systems are 13.56% for PV panel, 13.74% for PV/T collector and 13,87% for PV/T-PCM.…”

Section: Introductionmentioning

confidence: 99%

Şebekeden Bağımsız Ev Tipi Uygulamaları için PCM Destekli PV/T Kollektörlerinin Deneysel Analizi

Bakır¹,

Bayrak²,

Öztop³

2021

European Journal of Science and Technology

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An experimental study was carried out to examine the efficiency of solar energy in photovoltaic thermal collectors (PV/T) with energy storage. A photovoltaic thermal collector was used to generate both electrical energy and hot water. The effects of inclination angle of PV/T collectors on power, temperature, energy and exergy values were investigated. Also, effects of cellular shading are tested and discussed. PV/T was compared with the conventional PV/T collector by adding phase change material (PCM) for one of the collectors. In addition, the effect of different shading conditions (small, medium and large circle) on the power and hot water output of the PV/T collector at optimum slope angle were investigated. It is found that 7 ºC temperature differences are

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“…Additionally, they indicated that the numerical results exhibited a reasonable agreement with experimental results by an average relative error of 4.61%. Fayaz et al 26 conducted an experimental study together with a numerical simulation to examine the influence of PCM utilization on the performance of PV/T systems. They indicated not only that the electrical efficiency of the system is improved around 13% to 14% but also that there was a negligible difference between the measured and numerically computed improvement rates.…”

Section: Introductionmentioning

confidence: 99%

Implications of boundary conditions on natural convective heat transfer of molten phase change material inside enclosures

Arıcı

Yıldız

Nižetić³

et al. 2020

Int J Energy Res

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Summary Considering the significance of the appropriate selection of boundary conditions (BCs) in modelling step for practical engineering applications, this study presents a numerical work focusing on the impacts of BCs on the natural convection of molten phase change material (PCM) used for cooling of photovoltaics (PV). A rectangular enclosure loaded with liquid PCM (Pr = 41.22) is considered at an inclination angle of θ = 30° to simulate a PV‐PCM system. Heat flux is applied to the top wall, and impacts of two different BCs at the bottom wall, namely isothermal and convective BCs, on the flow and heat transfer characteristics are compared by taking six different Biot numbers (0.1 ≤ Bi ≤ 100) into account, while the reference case is considered as isothermal BC. Furthermore, the effects of various aspect ratios (AR = 1, 2 and 4) and Rayleigh numbers (Ra = 104, 105 and 106) are also included. The results revealed that Biot number has a significant effect on mean Nusselt number. Compared to the isothermal case, low Biot numbers (Bi < 10) significantly restrict convection motions inside the enclosure and result in remarkably different mean Nusselt numbers, while high Biot numbers give significantly similar results due to low thermal resistance outside the bottom wall. Moreover, the heat transfer enhancement by increasing AR and Ra is considerably high at high Biot numbers, while it is remarkably constricted at low Biot numbers. As a result of comprehensive analyses, it is deduced that utilization of isothermal BCs instead of convective BC for easiness of modelling can be a reasonable approach providing that Biot number is sufficiently large (Bi > 10). Although the inspiration of the present study is PV/PCM systems, the results can be generalized for any kind of fluids used in similar natural convection applications.

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Numerical and outdoor real time experimental investigation of performance of PCM based PVT system

Cited by 148 publications

References 36 publications

Performance analysis of solar assisted heat pump coupled with build-in PCM heat storage based on PV/T panel

Performance analysis of solar assisted heat pump coupled with build-in PCM heat storage based on PV/T panel

Şebekeden Bağımsız Ev Tipi Uygulamaları için PCM Destekli PV/T Kollektörlerinin Deneysel Analizi

Implications of boundary conditions on natural convective heat transfer of molten phase change material inside enclosures

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