Phase Change Material Melting in an Energy Storage Module for a Micro Environmental Control System
| Autor: | Mustafa Koz, H. Ezzat Khalifa |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science business.industry 020209 energy Environmental control system General Engineering Evaporation 02 engineering and technology Energy consumption Condensed Matter Physics Phase-change material Energy storage 020401 chemical engineering Latent heat Heat exchanger Heat transfer 0202 electrical engineering electronic engineering information engineering General Materials Science 0204 chemical engineering Process engineering business |
| Zdroj: | Journal of Thermal Science and Engineering Applications. 10 |
| ISSN: | 1948-5093 1948-5085 |
| DOI: | 10.1115/1.4040896 |
| Popis: | An experimentally validated finite element model (FEM) was developed to analyze the design parameters of a latent heat storage device (LHSD) for a micro environmental control system (μX). The μX provides local cooling to an office worker in a room whose thermostat setpoint has been elevated from 23.9 °C (75 °F) to 26.1 °C (79 °F) in order to reduce heating, ventilation, and air conditioning (HVAC) energy consumption. For this application, the LHSD is designed to provide ≥50 W of cooling for a full, 8.5 h workday to restore thermal comfort in the warm, 26.1 °C room. The LHSD comprises several parallel slabs of encased phase change material (PCM) with interposed airflow channels. The airflow rate is selected to obtain ≥50 W of cooling at the end of the 8.5 h operation. The LHSD exhibits a decreasing cooling rate over the 8.5 h period when a constant airflow is passed through it, indicating that more cooling is supplied during the day than the minimum 50 W required for thermal comfort. The parametric analysis explores the effects of PCM thermal conductivity, slab thickness, air channel width, and number of slabs on LHSD performance. Parametric cases are compared against each other on the basis of their required PCM mass and energy consumption. |
| Databáze: | OpenAIRE |
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