Extended abstract In this study, energy and cost analyzes were performed depending on the results obtained with different drying air inlet temperatures in the drying chamber of the horizontal type corn drying plant using liquefied LPG in the drying of the drying air. In the drying process, thermodynamic properties such as temperature, relative humidity and air velocity of the node points determined in the system are measured. Measurements in the study were made by sending drying air at different temperatures (85 ° C, 90 ° C and 95 ° C) in the constant airflow of corn drying process. As a result of the energy and cost analyzes made on the basis of the data obtained from the six node points determined in the system,the effects of the drying air inlet temperature, the temperature of the heater inlet air and relative humidity changes were been evaluated over the energy efficiency, consumption of fuel and the unit drying cost. As a result of the investigation, it is seen that drying of the drying air decreases the drying rate of the unit by decreasing the inlet temperature to the drying chamber. Average unit drying cost was calculated as 0.085 TL / kg. The reason for this is that the dehumidification capacities are different due to the difference between the unit drying costs of experiments 1 and 2 with one moisture content close to one. As a result of the analyzes, it was determined that the rate of specific dehumidification from the system was about 0.112 kgwater / kWh on average. It has been found that with the establishment of the specific dehumidification rate, the temperature decreases and tends to increase. InS the two experiments that disturb this situation, the humidification of the air entering the energy source must be very high and the temperature must be low. The amount of energy required to remove unit moisture from the system was calculated as 30574 kJ / kgwater averagely. The basic parameter that influences Siougul energy consumption is the moisture content of the product. In experiments 1 and 3, the amount of moisture on the surface is low due to the lower moisture content. This increases the specific energy consumption since the drying period at constant speed is shorter and the decreasing speed period is longer than the constant speed. It is expected that the specific dehumidification rate, which is another expression of energy efficiency, is parallel to the energy efficiency. Because the moisture content of the product dried in the facilities is different, the rate of specific dehumidification is low in the facilities where the product with high moisture content is dried. In the products with low moisture content, were found to be higher. As a result of the experimental measurements, it was determined that the decrease of the air inlet temperature and the decrease of the fuel consumption. In the analysis made, energy efficiency and change in unit drying cost are achieved as a result of changing the temperature of the inlet air to play the greatest role. Apart from this, it is clear that the effects of inlet air relative humidity and corn inlet temperature on energy efficiency and unit drying cost can not be ignored.