Wind Heat Loss From Corrugated, Transpired Solar Collectors

Gawlik, Keith; Kutscher, C.

doi:10.1115/1.1487886

Cited by 31 publications

(9 citation statements)

References 5 publications

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“…On the basis of experimental measurements, Van Decker et al (2001) presented a predictive model to estimate heat exchanger effectiveness in three regions including the front of the plate, the hole, and the back of the plate with square layout. Based on the numerical and experimental results, Gawlik and Kutscher (2002) presented a correlation for wind heat loss from corrugated plate with suction. This formula has been presented for both separate and attached flow regimes.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of performance of Photovoltaic–Thermal Unglazed Transpired Solar Collectors (PV/UTCs): Energy, exergy, and electrical-to-thermal rational approaches

2014

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Section: Introductionmentioning

confidence: 99%

Experimental study of performance of Photovoltaic–Thermal Unglazed Transpired Solar Collectors (PV/UTCs): Energy, exergy, and electrical-to-thermal rational approaches

2014

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“…They calculated the heat exchanger's efficiency in three areas: First, the front side of the plate, Second hole area, Third, the back of the perforated plate. (Gawlik & Kutscher, 2002) studied experimentally and numerically the heat loss by convection between corrugated absorber plat and the wind; they found the correlation for convection heat loss in the airflow on the wave surface of the plate such as separated flow and attached flow. (Gawlik et al, 2005) studied the low thermal conductivity of air in the solar system experimentally and numerically.…”

Section: Introductionmentioning

confidence: 99%

Experimental study for improving unglazed solar system

Mahmood

2021

Cogent Engineering

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The experimental study presents an improved thermal analysis performance for the conventional unglazed transpired collector (UTC). Decreasing radiation and convection heat transfer loss to the environment and increasing heat transfer coefficient of the passing air with, first: Adding fifteen-wire mesh layers as an alternative of the perforated absorbing plate. The porous media, with a crosssectional area of 2.2 mm× 2.2 mm and an internal diameter of 4.11 mm, located in the plenum channel of the collector to enlarge the absorbing heat area and heat transfer coefficient. Second: Fixed a 3 mm thickness of galvanized plat above the wire mesh layers for decreasing the heat loss from the unglazed solar collector to the environment. The relation of the inlet temperature, solar intensity, and the temperature difference, with a time of day, was indicated for air velocity from 2 m/s to 7 m/s. The results showed that thermal efficiency improved by increasing the airflow rate and the maximum thermal efficiency of 63.3% for seven m/s. However, the temperature difference (ΔT) was increased to a maximum value of 31.6°C, at air velocity decreased to 2 m/s. The thermal efficiency increased as the temperature parameter (Ti-Ta)/I reduced. When temperature parameter (Ti-Ta)/I, increased high heat loss was made. Also, there was a good agreement between the outlet temperature experimental results and the theoretical model's prediction.

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“…04-0 . 05 m/s are recommended for field installations to ensure wind heat loss and 'outflow' do not compromise the performance of the TSC (Gawlik and Kutscher, 2002;Kutscher et al, 2003). Outflow is where the heated air in the plenum exits through a section of the TSC absorber, thus losing the heat generated.…”

Section: Basic Tsc Energy Balance Equationmentioning

confidence: 99%

“…174-177), T col is the temperature of the perforated absorber and h rad is the linearised radiation heat transfer coefficient (linearising the radiation heat transfer coefficient is an effective means of converting the temperature to the power of 4 as described by the Stefan-Boltzmann law to a linear formula over a narrow temperature range). Equation 2 assumes that the TSC is large and wind heat loss can be considered negligible (Gawlik and Kutscher, 2002).…”

Section: Basic Tsc Energy Balance Equationmentioning

confidence: 99%

Transpired solar collectors for ventilation air heating

Hall

Wang

Ogden

et al. 2011

Proceedings of the Institution of Civil Engineers - Energy

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Transpired solar collectors (TSCs) improve the environmental performance of buildings by preheating incoming ventilation air using solar energy, substituting the need to use fossil fuels. TSCs have been used successfully in the USA and Canada over the past 20 years and have been shown to achieve economic payback of between 2 and 10 years.The economic performance is achieved through a combination of high thermal efficiency and the low cost of the solar collector, which is in the form of a single perforated steel sheet. In 2006, the first installation of a TSC in the UK was on a single-storey industrial building in County Durham and during its first year of operation, the TSC provided around 20% of the building's heating demand. This paper presents a review of the research into TSC technology, examining its thermal performance, the different construction types, annual energy performance, and international experiences. The evidence from the UK-based research performance investigations suggest that the success of TSCs in the USA and Canada could be replicated in the UK.

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Wind Heat Loss From Corrugated, Transpired Solar Collectors

Cited by 31 publications

References 5 publications

Experimental study of performance of Photovoltaic–Thermal Unglazed Transpired Solar Collectors (PV/UTCs): Energy, exergy, and electrical-to-thermal rational approaches

Experimental study of performance of Photovoltaic–Thermal Unglazed Transpired Solar Collectors (PV/UTCs): Energy, exergy, and electrical-to-thermal rational approaches

Experimental study for improving unglazed solar system

Transpired solar collectors for ventilation air heating

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