Sensitivity analysis for optimization of renewable-energy-based air-circulation-type temperature-control system

Haksung Lee, Akihito Ozaki

Research output: Contribution to journalArticle

Abstract

A detailed investigation of thermal performance of an air-circulation-type temperature-control system to serve as an alternative means of saving energy and heat storage is reported. The proposed system is of the hybrid type combining a central air-conditioning system, system incorporating phase-change material (PCM), and a roof-ventilation layer. The said hybrid system was tested by means of an experiment performed in an actual house located in Yufuin in the Oita prefecture in Japan. Numerical analysis was performed using Hygrabe—an unsteady heat-transfer-analysis tool—for the building envelope. Results of the said experiment were observed to accurately predict the effects of radiative cooling, exhaust cooling, cold storage and release in summer, solar-heat collection, and heat storage and release in winter. The potential for improved operation of the proposed system was demonstrated via parameter sensitivity analysis, which quantified the change in each effect along with resulting correlations deduced based on changes brought about in individual factors, such as air velocity, roof length, and PCM box. The proposed study, therefore, facilitates development of design guidelines for temperature-control systems to be installed in high-performance passive homes.

Original languageEnglish
Pages (from-to)317-329
Number of pages13
JournalApplied Energy
Volume230
DOIs
Publication statusPublished - Nov 15 2018

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Heat storage
Phase change materials
Temperature control
Roofs
Sensitivity analysis
roof
sensitivity analysis
control system
Cold storage
Cooling
cooling
Control systems
Ventilation exhausts
air conditioning
air
Air
Hybrid systems
Air conditioning
Energy storage
Ventilation

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

Cite this

Sensitivity analysis for optimization of renewable-energy-based air-circulation-type temperature-control system. / Lee, Haksung; Ozaki, Akihito.

In: Applied Energy, Vol. 230, 15.11.2018, p. 317-329.

Research output: Contribution to journalArticle

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