Test method for evaluating and predicting thermal performance of thermosyphon solar domestic hot water system

Weiqiang Kong, Zhifeng Wang*, Xing Li, Guofeng Yuan, Jianhua Fan, Bengt Perers, Simon Furbo

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A test method for evaluating and predicting the thermal performance of thermosyphon Solar Domestic Hot Water (SDHW) system was proposed. The evaluating mathematical model of SDHW system was developed based on the two-node theory – a SDHW system was divided into the solid part and the fluid part. By combining the dynamic energy conservation equations of the solid part and the fluid part, the evaluating mathematical model of SDHW system was derived. The model parameters have clear physical meaning which can be used to evaluate the SDHW systems. The evaluating mathematical model was further processed by using the Laplace transformation technique and the predicting mathematical model was then derived. The predicting model can be used to predict the thermal performance of SDHW system for short and long term period with flexible draw off load conditions. The experimental method was designed and experiments were carried out to validate the test method. The measured mean fluid temperature in the storage tank was compared to the predicted mean fluid temperature. The annual thermal performance prediction of the system with two draw off load conditions at different daily hot water consumptions was also carried out.
Original languageEnglish
JournalApplied Thermal Engineering
Volume146
Pages (from-to)12-20
ISSN1359-4311
DOIs
Publication statusPublished - 2019

Keywords

  • Solar domestic hot water system
  • Thermal performance prediction
  • Laplace transformation method
  • Thermosyphon solar water heater

Cite this

@article{cfbd97801f4a4fad897baa7582b62c65,
title = "Test method for evaluating and predicting thermal performance of thermosyphon solar domestic hot water system",
abstract = "A test method for evaluating and predicting the thermal performance of thermosyphon Solar Domestic Hot Water (SDHW) system was proposed. The evaluating mathematical model of SDHW system was developed based on the two-node theory – a SDHW system was divided into the solid part and the fluid part. By combining the dynamic energy conservation equations of the solid part and the fluid part, the evaluating mathematical model of SDHW system was derived. The model parameters have clear physical meaning which can be used to evaluate the SDHW systems. The evaluating mathematical model was further processed by using the Laplace transformation technique and the predicting mathematical model was then derived. The predicting model can be used to predict the thermal performance of SDHW system for short and long term period with flexible draw off load conditions. The experimental method was designed and experiments were carried out to validate the test method. The measured mean fluid temperature in the storage tank was compared to the predicted mean fluid temperature. The annual thermal performance prediction of the system with two draw off load conditions at different daily hot water consumptions was also carried out.",
keywords = "Solar domestic hot water system, Thermal performance prediction, Laplace transformation method, Thermosyphon solar water heater",
author = "Weiqiang Kong and Zhifeng Wang and Xing Li and Guofeng Yuan and Jianhua Fan and Bengt Perers and Simon Furbo",
year = "2019",
doi = "10.1016/j.applthermaleng.2018.09.086",
language = "English",
volume = "146",
pages = "12--20",
journal = "Applied Thermal Engineering",
issn = "1359-4311",
publisher = "Pergamon Press",

}

Test method for evaluating and predicting thermal performance of thermosyphon solar domestic hot water system. / Kong, Weiqiang; Wang, Zhifeng; Li, Xing; Yuan, Guofeng; Fan, Jianhua; Perers, Bengt; Furbo, Simon.

In: Applied Thermal Engineering, Vol. 146, 2019, p. 12-20.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Test method for evaluating and predicting thermal performance of thermosyphon solar domestic hot water system

AU - Kong, Weiqiang

AU - Wang, Zhifeng

AU - Li, Xing

AU - Yuan, Guofeng

AU - Fan, Jianhua

AU - Perers, Bengt

AU - Furbo, Simon

PY - 2019

Y1 - 2019

N2 - A test method for evaluating and predicting the thermal performance of thermosyphon Solar Domestic Hot Water (SDHW) system was proposed. The evaluating mathematical model of SDHW system was developed based on the two-node theory – a SDHW system was divided into the solid part and the fluid part. By combining the dynamic energy conservation equations of the solid part and the fluid part, the evaluating mathematical model of SDHW system was derived. The model parameters have clear physical meaning which can be used to evaluate the SDHW systems. The evaluating mathematical model was further processed by using the Laplace transformation technique and the predicting mathematical model was then derived. The predicting model can be used to predict the thermal performance of SDHW system for short and long term period with flexible draw off load conditions. The experimental method was designed and experiments were carried out to validate the test method. The measured mean fluid temperature in the storage tank was compared to the predicted mean fluid temperature. The annual thermal performance prediction of the system with two draw off load conditions at different daily hot water consumptions was also carried out.

AB - A test method for evaluating and predicting the thermal performance of thermosyphon Solar Domestic Hot Water (SDHW) system was proposed. The evaluating mathematical model of SDHW system was developed based on the two-node theory – a SDHW system was divided into the solid part and the fluid part. By combining the dynamic energy conservation equations of the solid part and the fluid part, the evaluating mathematical model of SDHW system was derived. The model parameters have clear physical meaning which can be used to evaluate the SDHW systems. The evaluating mathematical model was further processed by using the Laplace transformation technique and the predicting mathematical model was then derived. The predicting model can be used to predict the thermal performance of SDHW system for short and long term period with flexible draw off load conditions. The experimental method was designed and experiments were carried out to validate the test method. The measured mean fluid temperature in the storage tank was compared to the predicted mean fluid temperature. The annual thermal performance prediction of the system with two draw off load conditions at different daily hot water consumptions was also carried out.

KW - Solar domestic hot water system

KW - Thermal performance prediction

KW - Laplace transformation method

KW - Thermosyphon solar water heater

U2 - 10.1016/j.applthermaleng.2018.09.086

DO - 10.1016/j.applthermaleng.2018.09.086

M3 - Journal article

VL - 146

SP - 12

EP - 20

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

ER -