الفهرس 
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Abstract
This study was carried out to compare three different types of energy sources used in warming poultry houses. Experiments were carried out during winter 2019 at Training center for recycle agriculture residues TCRAR belong to Agriculture Research Center; Moshtahar, Tukh, El Qulibia governorate Egypt.
Because of current energy shortage, there has been much interest in developing new method in warming poultry houses as alternatives to Traditional methods. Biogas appears to be a feasible nontraditional gas for warming poultry houses because it can be derived from agricultural roughages, poultry houses waste and residues which provide the raw material for biogas production. Biogas technologies are a workable source of energy especially for the rural people.
The experimental measurements included the temperature and relative humidity in three kind of poultry houses model, ambient air temperature and its relative humidity, and Follow the daily weight recording. Methods: Three models of poultry houses were used to compare the most famous types of energy sources used in warming: electricity and liquefied petroleum gas (LPG) with the third model which is biogas. Used equipment’s: contain from (power supply, Arduino, connecting cables, bread board, R.T.C, SD Card Module with Arduino, DHT22, Fans, solenoid valve, Spark Module, spark plug and relay) connected to each other to make system control and observation heat and humidity. High relative humidity when warming with LPG and high start-up costs in the situation of warming with biogas due to the high prices of raw materials needed to build the digester in the long run, however, renewable energy is the best, sustainable and cheaper alternative, avoiding the ever-increasing prices of fossil energies. warming with LPG increases the relative humidity significantly and more than the relative humidity producing from biogas, burning process also increases the percentage of toxic gases in the poultry house So should Increase ventilation should be considered in the situation of warming based on fuel burning.