Experimental Study on the Thermal and Electrical Characteristics of an Air-Based Photovoltaic Thermal Collector

Kim, Sang-Myung; Kim, Jinhee; Kim, Jun-Tae

doi:10.3390/en12142661

Cited by 16 publications

(5 citation statements)

References 19 publications

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“…Kim et al suggested a newly designed air-type PVT collector, which has bending round-shaped heat-absorbing plates and experimentally investigated the electrical and thermal characteristics. In this study, it was observed that thermal and electrical efficiencies improved as the air mass flow rate was raised [1]. Choi et al suggested a PVT air collector that employed a non-uniform transverse rib and double-flow air channel.…”

Section: Introductionmentioning

confidence: 78%

“…It can directly change incident solar radiation into electrical power. However, only around 12-18% of solar radiation turns into useful electrical energy during the operation of the PV module [1]. Much solar irradiance captured by a PV module is reflected or changed into thermal energy that leads to high increases in the temperature of the PV module.…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of PVT Air Collector Coupled with a Triangular Block in Actual Climate Conditions in Korea

Choi

2022

Energies

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This study experimentally investigated the performance of a PVT air collector coupled with a triangular block. The triangular block, newly suggested by the authors, is a triangular-shaped obstacle and was inserted at the bottom of the PVT air collector to enhance the heat transfer performance of the collector. The experiment was carried out in actual climate conditions in Korea with two air mass flow rate conditions: 0.03606 kg/m2 s and 0.06948 kg/m2 s. Results show the average values of electrical efficiency of the collector during the test period to be 16.15% and 16.43% for each air mass flow rate, while thermal efficiencies were 28.83% and 38.36%, respectively. The average values of total energy efficiencies were found to be 44.99% and 54.79%, respectively. The results show that air mass flow rate has a large impact on thermal and total energy efficiency, while it has a small impact on electrical efficiency. Furthermore, it was confirmed that the PVT air collector coupled with a triangular block can enhance the utilization of solar energy since the thermal performance was higher than that of the collector without a triangular block.

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Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of PVT Air Collector Coupled with a Triangular Block in Actual Climate Conditions in Korea

Choi

2022

Energies

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“…In the present work, the PVT collectors with and without triangular obstacles are modeled based on the simple thermal circuit model reported and used in previous studies similar to the present work [16,[33][34][35][36]. performance, and they reported that the suggested PVT collector had thermal and electrical efficiencies of 29-42% and 15.71-16.25%, respectively [29]. Choi et al evaluated the performance of a PVT collector coupled with a triangle-shaped obstacle located at the bottom of the air duct, experimentally, in the actual weather condition [30,31].…”

Section: Theoretical Model Of the Air-cooled Pvt Collectormentioning

confidence: 95%

“…Moreover, this method has benefits in manufacturing and price because of its simple design. Kim et al proposed a PVT collector with a round heat-absorbing plate in an air channel and experimentally investigated its performance, and they reported that the suggested PVT collector had thermal and electrical efficiencies of 29-42% and 15.71-16.25%, respectively [29]. Choi et al evaluated the performance of a PVT collector coupled with a triangle-shaped obstacle located at the bottom of the air duct, experimentally, in the actual weather condition [30,31].…”

Section: Introductionmentioning

confidence: 99%

Influence of Triangle-Shaped Obstacles on the Energy and Exergy Performance of an Air-Cooled Photovoltaic Thermal (PVT) Collector

Choi

2022

Sustainability

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A photovoltaic thermal (PVT) collector is a type of solar collector that can simultaneously produce electrical and thermal energy from solar energy. In this research, the daily and annual performances of an air-cooled PVT collector with triangle-shaped obstacles were investigated and compared with those of a conventional air-cooled PVT collector. Based on the thermal circuit model, a numerical model of the air-cooled PVT collector containing triangle-shaped obstacles has been developed and validated using experimental results. A typical meteorological year’s weather data from Ulsan, Korea was used as the weather data. From the results, it was seen that the daily average thermal, electrical, and overall energy and exergy efficiencies for the PVT collector with triangle-shaped obstacles were 24.73%, 15.59%, 62.83%, and 15.57%, respectively, while those values of conventional PVT collector were 17.08%, 15.30%, 54.47%, and 15.13%, respectively. The results also showed that the annual energy and exergy outputs of the PVT collector with triangle-shaped obstacles were 12.84% and 1.98% greater than those of the conventional air-cooled PVT collector. From these results, it was clearly confirmed that the triangle-shaped obstacles can enhance the energy and exergy outputs of the air-cooled PVT collector.

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“…When air passes through the PVT collector from the inlet to the outlet, the absorber plates lengthen the airflow pathway and create turbulence inside the collector. The lengthened air pathway and turbulence both help to increase heat transfer and improve the thermal performance of the PVT collectors [19]. The designed BIPVT collectors were connected to a direct expansion air handling unit (AHU) and installed in an experimental house.…”

Section: Experimental House Of the Ahu System With Bipvt Collectormentioning

confidence: 99%

Experimental Performance of an Advanced Air-Type Photovoltaic/Thermal (PVT) Collector with Direct Expansion Air Handling Unit (AHU)

Kim

2021

Sustainability

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In addition to electrical energy generation, photovoltaic/thermal (PVT) systems utilize heat from building-integrated photovoltaic (BIPV) modules for domestic hot water and space heating. In other words, a PVT system can improve the electricity efficiency of BIPVs while using the waste heat of BIPVs as a source of thermal energy for the building. By generating thermal and electrical energies simultaneously, PVT systems can improve the utilization of solar energy while enhancing the energy performance of buildings. To optimize the performance of an air-type PVT collector, it is necessary for the system to extract more heat from the PV module. Consequently, this approach decreases PV temperature to improve PV electrical energy generation. The thermal and electrical performance of an air-type PVT collector depends on its design, which affects airflow and heat transfer. Moreover, the performances of the PVT collector can differ according to the coupled facility in the building. In this study, the thermal and electrical performances of an advanced air-type PVT collector with a direct expansion air handling unit (AHU) were analyzed experimentally. For this purpose, six prototypes of an advanced air-type PVT collector were developed. Furthermore, a direct expansion AHU with a heat recovery exchanger (HRX) was designed and built. The advanced PVT collectors with a total capacity of 740 Wp were installed in an experimental house and were coupled to the direct expansion AHU system with a maximum airflow of 700 CMH. The performance of PVT collectors was analyzed and compared with the BIPV system. Results showed that building-integrated photovoltaic/thermal (BIPVT) collectors produced 30 W more power than the BIPV system. When operating the AHU system, the temperature of the BIPVT collector was generally lower than the BIPV. The maximum difference in temperature between BIPVT and BIPV was about 22 °C. During winter season, the BIPVT collector supplied preheated air to the AHU. The supplied air temperature from the BIPVT collector reached 32 °C, which was 15 °C higher than outdoor air temperature.

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Experimental Study on the Thermal and Electrical Characteristics of an Air-Based Photovoltaic Thermal Collector

Cited by 16 publications

References 19 publications

Performance Evaluation of PVT Air Collector Coupled with a Triangular Block in Actual Climate Conditions in Korea

Performance Evaluation of PVT Air Collector Coupled with a Triangular Block in Actual Climate Conditions in Korea

Influence of Triangle-Shaped Obstacles on the Energy and Exergy Performance of an Air-Cooled Photovoltaic Thermal (PVT) Collector

Experimental Performance of an Advanced Air-Type Photovoltaic/Thermal (PVT) Collector with Direct Expansion Air Handling Unit (AHU)

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