جستجوی مقالات مرتبط با کلیدواژه "سیستم ذخیره انرژی" در نشریات گروه "مکانیک"

This paper introduces solar radiation estimation function based on air mass and the statistics information about sunny and cloudy days for use in numerical modeling of solar ponds. Solar ponds are one of the methods of absorbing solar radiation and storage it with long storage periods. By using one-dimensional simulation, the performance of salt gradient solar pond is investigated. By removing the usual assumptions, it is attempted to take into account the effects of environmental conditions more realistically. These conditions included the variability of ambient temperature by day and hour, the solubility of salt depend on temperature and concentration, the variability of radiation intensity with respect to the angle of elevation of the sun, and the effect of wall shading on the pond. The analysis is transient and the day and night conditions are included. The innovation was to estimate the intensity of solar radiation using the concept of air mass and the amount of cloudy sky. A relation for the calculation of cloud cover factor, which was extracted using the statistics of cloudy and semi-cloudy days and was compared with empirically amount. The ability of this relationship is to estimate the radiation intensity for locations where statistics or tools and equipment for recording radiation intensity are missing. Presented results show that the radiation intensity is in good agreement with the existing experimental data.

Due to the limited energy resources and the need to save energy, use of solar energy as a strategic approach is extremely important. So in this article by using system to store solar Energy for heating buildings in Laboratory of Islamic Azad university -SemnanBranch. In this approach tried to optimized using of solar energy. In this system, the energy requirements of the building using software «Carrier» during the day and then the solar energy are calculated using mathematical equations. A code written in «MATLAB» for optimum Solar Energy consumption where calculates storage system level thermal load and thermal load of the auxiliary system (boiler) on the day. Utilizing the code, all needed magnitude of geometry as the collector area requirements according to the heat load are provided.