Measuring the optimal effectiveness and energy storage through the system of photovoltaic collectors and phase change materials in a hot and dry climate (case study: Khodadoost Hospital in Shiraz)
Subject Areas : Renewable EnergySaeed Azemati 1 , walya nasir 2 , Amirhossein Zand 3 , fiza Ahmed 4
1 - Department of Architecture, Et.c, Islamic azad University, Tehran, Iran.* (Corresponding author)
2 - Bachelor of Architecture student, Department of Architecture, Et.c, Islamic azad University, Tehran, Iran.
3 - Bachelor of Architecture student, Department of Architecture, Et.c, Islamic azad University, Tehran, Iran.
4 - Bachelor of Architecture student, Department of Architecture, Et.c, Islamic azad University, Tehran, Iran.
Keywords: energy optimization, energy storage, photovoltaic collectors, phase change materials, therapeutic buildings,
Abstract :
Background and objective: Today, the energy crisis and the consequences of the use of fossil fuels in the form of greenhouse gas emissions and environmental effects have drawn the attention of scientists to the optimization of energy consumption. Materials used for energy storage are called PCM or phase change materials; These materials perform the storage process during the phase change process (change from solid to liquid or vice versa) and absorb heat from the environment without increasing the temperature and release the absorbed heat when the temperature decreases. The present study was conducted in Shiraz city with the aim of measuring the optimal effectiveness and energy storage through the system of photovoltaic collectors and phase change materials in a hot and dry climate.
Materials and Methods: First, with the help of Climate Consultant software and using the weather data of Shiraz city, the annual radiation diagram of this city is checked and then based on the building specifications, including; Physical structure, users, as well as annual weather data hour by hour, the location of the building, taking into account all the conditions, especially the accuracy and validity of the results of calculation algorithms, Builder Design software for simulation Selected.
Findings: Phase change materials can be used to improve the natural ventilation potential of passive cooling systems, especially in hot and dry climates, although phase change materials have their maximum efficiency when the melting point of these materials is proportional to the comfort temperature in the hottest month. be the year of that region. According to the studied climate, phase change materials with a melting point of 28°C have been selected.
Discusion and conclusion: The results show that during peak electricity consumption, phase change materials are melted or frozen by heat sources in order to store electricity in the form of latent heat thermal energy and are used at the required time. Therefore, if latent heat thermal storage systems are combined with active systems such as photovoltaic collectors, it will help to reduce the cost of electricity consumption. According to the data obtained from the surveys, the total surface exchange in phase change materials is equal to 394.7 m2.
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