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Experimental investigation on enhancement of thermal performance with obstacle placing in the horizontal hot water tank used in solar domestic hot water system

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  • Erdemir, Dogan
  • Atesoglu, Hakan
  • Altuntop, Necdet

Abstract

Horizontal mantled hot water tanks are widely used in solar domestic hot water systems. Increasing thermal performance of the hot water tank is significant issue for thermodynamic efficiencies of the system and user satisfaction. This study presents an experimental study for determining the effect of obstacle placing on thermal performance in horizontal mantled hot water tank. Obstacles were positioned perpendicular to the flow direction inside the tank in different positions. First, one obstacle was placed inside the tank in different positions and then two obstacles were placed inside the tank. Results were presented over the temperature distribution inside the tank, mantle outlet temperature, main outlet temperature, energy efficiency and exergy efficiency. At the end of the study, it was found that obstacle placing in horizontal mantled hot water tank increased the thermal performance of tank. Temperature distribution results showed that placing obstacle inside the tank increased stored hot water temperature and volume. Mantle outlet temperature could be decreased 1.5 °C, and the main outlet temperature could be increased 3.6 °C by placing obstacles inside the tank. Consequently, when all performance criteria considered, the best thermal performances were seen in a = 150 mm, a = 150 mm b = 100 mm and a = 350 mm b = 100 mm.

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  • Erdemir, Dogan & Atesoglu, Hakan & Altuntop, Necdet, 2019. "Experimental investigation on enhancement of thermal performance with obstacle placing in the horizontal hot water tank used in solar domestic hot water system," Renewable Energy, Elsevier, vol. 138(C), pages 187-197.
    • Handle: RePEc:eee:renene:v:138:y:2019:i:c:p:187-197
    DOI: 10.1016/j.renene.2019.01.075
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    Cited by:

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    3. Li, Qiong & Huang, Xiaoqiao & Tai, Yonghang & Gao, Wenfeng & Wenxian, L. & Liu, Wuming, 2021. "Thermal stratification in a solar hot water storage tank with mantle heat exchanger," Renewable Energy, Elsevier, vol. 173(C), pages 1-11.
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    6. Agnieszka Malec & Tomasz Cholewa & Alicja Siuta-Olcha, 2021. "Influence of Cold Water Inlets and Obstacles on the Energy Efficiency of the Hot Water Production Process in a Hot Water Storage Tank," Energies, MDPI, vol. 14(20), pages 1-26, October.

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