Abstract
In this study, a solar powered mechanical ventilation unit has investigated and tested in terms of efficiency and performance. Test unit can be divided into two parts, the first one is ventilation unit with 370 m3/h max airflow rate and max 167 W fan power provides fresh air for a residency and recovers heat from the climatized exhaust air. Total area is 70 m2 for the residency and total occupant is four. The second part of the test system is solar energy power system with two 325 W polycrystalline photovoltaic panels, an inverter and two batteries. The mechanical ventilation unit has energized by a solar photovoltaic system; if the solar energy is not available then ventilation unit has connected to the national electricity grid. This is an alternative option to consumers to use electricity by the grid in case the PV system does not produce enough energy because of the usage or the technical problems or the weather conditions based on the seasons. On the other hand, in some cities, number of photovoltaic panels rolled up upper number according to solar energy potential and therefore resulted excess electricity has assumed to sell to the national grid. According to the results, the test system is able to operate at maximum ventilation necessity and power consumption without grid connection in Izmir. Furthermore, we have compared Izmir and Romania in accordance with feasibility for the same mechanical ventilation system at max flow rate and required ventilation rate is determined depends on daily usage scenario of the room.
Highlights
People mostly spend their time in indoor environment such as school, office, home, etc
Number of photovoltaic panels rolled up upper number according to solar energy potential and resulted excess electricity has assumed to sell to the national grid
For the maximum ventilation rate of a 70m2 residency calculated according to a daily usage scenario and EN 15251
Summary
People mostly spend their time in indoor environment such as school, office, home, etc. Ii) People in the building proper mechanical ventilation is mandatory for all type buildings for the health and higher indoor air quality. Since lower energy consumption is another restriction for buildings, recovery of wasted energy from exhausted air by using heat recovery unit is necessary for energy efficiently ventilation of buildings. EN15251 includes indoor environmental input parameters for design and assessment of energy performance of buildings such as indoor air quality, thermal environment, lighting and acoustics. Energy consumption of buildings depends significantly on the criteria used for the indoor environment (temperature, ventilation and lighting) and building (including systems) design and operation. Ventilation rate is one of the most important factors affecting indoor air quality and energy consumption of buildings [6, 7]. According to the experimental study, ventilation unit at max flow rate (370 m3/h and 167 W) power consumption is able to operate almost eight hours without grid connection in Izmir
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