Energy performance analysis of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector under the Mediterranean climate conditions

Altin Maraj; Andonaq Londo; Alemayehu Gebremedhin; Coskun Firat

doi:10.1016/j.renene.2019.03.109

Energy performance analysis of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector under the Mediterranean climate conditions

Altin Maraj^*, Andonaq Londo, Alemayehu Gebremedhin, Coskun Firat

^*Corresponding author for this work

Energy Institute

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

This work represents the energy performance analysis during the annual time period of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector having an aperture area of 1.476 m² under the Mediterranean climate conditions. For the purpose, recorded data from a field-trial installation are exploited. The recorded data obtained every minute are used to perform the energy analysis during an annual period. The analysis is performed by using mathematical models and by representing the results for each month. Monthly values of measured parameters and calculated quantities offered a clear view regarding the operation of the considered field-trial installation for this climate region. For an annual irradiation on solar collector plane of 2,212 kWh/year, it was noticed that the annual useful heat gain for the heat pipe evacuated solar tube collector, the useful energy delivered by the solar circuit to the storage tank, and the delivered energy to the thermal consumer were 1,345 kWh/year, 1,311 kWh/year, and 1,009 kWh/year, respectively. The annual efficiency for the heat pipe evacuated solar tube collector was 0.62, while for the forced circulated system was 0.516. Also, the annual energy balance of the system obtained from the calculation is built.

Original language	English
Pages (from-to)	874-883
Number of pages	10
Journal	Renewable Energy
Volume	140
DOIs	https://doi.org/10.1016/j.renene.2019.03.109
Publication status	Published - Sept 2019

Bibliographical note

Publisher Copyright:
© 2019

Funding

The authors acknowledge the financial support from the Agency for Research, Technology, and Innovation- Government of Albania through the project “Water and Energy 2010–2012”, No. 397. The utilized trial solar water heating system was provided through this project, which included also a dissertation thesis.

Funders	Funder number
Agency for Research, Technology, and Innovation- Government of Albania	397

Keywords

Collector efficiency
Forced circulation
Heat pipe
Solar fraction
System efficiency
Useful energy gain

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.renene.2019.03.109

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abstract = "This work represents the energy performance analysis during the annual time period of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector having an aperture area of 1.476 m2 under the Mediterranean climate conditions. For the purpose, recorded data from a field-trial installation are exploited. The recorded data obtained every minute are used to perform the energy analysis during an annual period. The analysis is performed by using mathematical models and by representing the results for each month. Monthly values of measured parameters and calculated quantities offered a clear view regarding the operation of the considered field-trial installation for this climate region. For an annual irradiation on solar collector plane of 2,212 kWh/year, it was noticed that the annual useful heat gain for the heat pipe evacuated solar tube collector, the useful energy delivered by the solar circuit to the storage tank, and the delivered energy to the thermal consumer were 1,345 kWh/year, 1,311 kWh/year, and 1,009 kWh/year, respectively. The annual efficiency for the heat pipe evacuated solar tube collector was 0.62, while for the forced circulated system was 0.516. Also, the annual energy balance of the system obtained from the calculation is built.",

keywords = "Collector efficiency, Forced circulation, Heat pipe, Solar fraction, System efficiency, Useful energy gain",

author = "Altin Maraj and Andonaq Londo and Alemayehu Gebremedhin and Coskun Firat",

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doi = "10.1016/j.renene.2019.03.109",

language = "English",

volume = "140",

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AU - Londo, Andonaq

AU - Gebremedhin, Alemayehu

AU - Firat, Coskun

PY - 2019/9

Y1 - 2019/9

N2 - This work represents the energy performance analysis during the annual time period of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector having an aperture area of 1.476 m2 under the Mediterranean climate conditions. For the purpose, recorded data from a field-trial installation are exploited. The recorded data obtained every minute are used to perform the energy analysis during an annual period. The analysis is performed by using mathematical models and by representing the results for each month. Monthly values of measured parameters and calculated quantities offered a clear view regarding the operation of the considered field-trial installation for this climate region. For an annual irradiation on solar collector plane of 2,212 kWh/year, it was noticed that the annual useful heat gain for the heat pipe evacuated solar tube collector, the useful energy delivered by the solar circuit to the storage tank, and the delivered energy to the thermal consumer were 1,345 kWh/year, 1,311 kWh/year, and 1,009 kWh/year, respectively. The annual efficiency for the heat pipe evacuated solar tube collector was 0.62, while for the forced circulated system was 0.516. Also, the annual energy balance of the system obtained from the calculation is built.

AB - This work represents the energy performance analysis during the annual time period of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector having an aperture area of 1.476 m2 under the Mediterranean climate conditions. For the purpose, recorded data from a field-trial installation are exploited. The recorded data obtained every minute are used to perform the energy analysis during an annual period. The analysis is performed by using mathematical models and by representing the results for each month. Monthly values of measured parameters and calculated quantities offered a clear view regarding the operation of the considered field-trial installation for this climate region. For an annual irradiation on solar collector plane of 2,212 kWh/year, it was noticed that the annual useful heat gain for the heat pipe evacuated solar tube collector, the useful energy delivered by the solar circuit to the storage tank, and the delivered energy to the thermal consumer were 1,345 kWh/year, 1,311 kWh/year, and 1,009 kWh/year, respectively. The annual efficiency for the heat pipe evacuated solar tube collector was 0.62, while for the forced circulated system was 0.516. Also, the annual energy balance of the system obtained from the calculation is built.

KW - Collector efficiency

KW - Forced circulation

KW - Heat pipe

KW - Solar fraction

KW - System efficiency

KW - Useful energy gain

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Energy performance analysis of a forced circulation solar water heating system equipped with a heat pipe evacuated tube collector under the Mediterranean climate conditions

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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