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Showing 2 results for Jafarkazemi
S.a. Behmoonesi, F. Jafarkazemi,
Volume 20, Issue 6 (June 2020)
Abstract
The aim of this paper is to compare the electric power output of the photovoltaic Module (PV) and photovoltaic-thermal water collector (PV/T). The electrical efficiency of photovoltaic Modules is greatly reduced by increasing their surface temperature. The hybrid photovoltaic-thermal collector consists of a PV Module with a thermal collector attached behind it. The circulating fluid in the collector removes heat from the module and increases its electrical efficiency. In the first part of this paper, a theoretical analysis of a liquid PV/T collector is made based on thermal modeling using the first law of thermodynamics. An unglazed hybrid photovoltaic-thermal collector with serpentine tubes has been designed and manufactured to validate the theoretical results. Then the collector has been tested for three days and results have been compared with a sample photovoltaic module. The theoretical calculations were performed using Matlab software and its results showed good agreement with experimental results. Our finding shows a maximum increase of 6% in the electrical efficiency of PV/T in comparison to the PV module. At the same time, the water temperature has increased by 5°C.
Alireza Asadi, Farzad Jafarkazemi, Mohammadhasan Jalaleddin Abyaneh,
Volume 22, Issue 12 (December 2022)
Abstract
The concept of Zero Energy Building [5] has been introduced globally to reduce energy consumption and carbon emissions in the building sector. Renewable energy systems such as Solar Thermal collectors, Photovoltaic collectors, and Heat Pumps are used to implement ZEBs. This study proposes a Building Integrated Photovoltaic Thermal-Air Source Heat Pump (BIPVT-ASHP) to realize ZEB in a small-scale building. To evaluate the performance of the system, a BIPVT-ASHP hybrid system model was designed, and also the building load model was defined based on the actual building conditions. Then, the heating and cooling performance of the BIPVT-ASHP system was dynamically simulated for one year using TRNSYS software. Then the system was numerically evaluated from energy, economic and environmental perspectives. According to the results of this study, for this system, the initial non-renewable energy consumption was 1.29 kWh/m2 per year, which was less than the heating energy threshold for the ZEB, and the proposed system met well the ZEB conditions. In addition, it was shown that for a given area, photovoltaic/thermal technology leads to a further reduction in non-renewable primary energy consumption but less solar thermal energy production compared to traditional separate production using photovoltaic [2] collectors.
