Ali Etem Gürel

Energy Analysis of a New Design of a Photovoltaic Cell-Assisted Solar Dryer

In this study, a new type of solar dryer was designed and manufactured. This new solar dryer is composed of a heat pipe collector, a drying chamber, a load cell, an air circulation fan, photovoltaic cells (PvC), batteries, and halogen lamps. In this experimental study, tomatoes were used to test the drying process. The drying air was heated by the heat pipe collector and forced through the tomatoes by a blower fan during the daytime. The photovoltaic cells, which were used to run the fan, were also used to charge the batteries during the day. These charged batteries were used for running the halogen lamps during the night, when the halogen lamps were used to heat the drying-air-assisted photovoltaic cells. During the drying period, the drying air temperature, relative humidity, air flow rates, solar radiation, and loss of mass were measured in the solar dryer. Then, the measured data were used for energy analysis.

Testing of a Condensation-type Heat Pump System for Low-temperature Drying Applications

Abstract A closed-type water source heat pump dryer integrated with a drying programme (DP) was designed and tested. The DP was developed using psychometric conditions of desired drying air and thermodynamic balance of heat pump. A drying algorithm was developed according to the technical specification of the dryer. Drying air temperature, relative humidity and drying air volumetric flow rate were entered from a programmable logic controller (PLC) screen. In this study, the drying of mint leaves was examined. Mint leaves were dried at different temperatures (35°C, 40°C and 45°C) and at different volumetric flow rates 300 m3/h for a velocity of 0.75 m/s and 600 m3/h for a velocity of 1.5 m/s in the PLC-controlled heat pump dryer. The relative humidity of the drying air entering the dryer chamber was kept between 13.88% and 6.81% and the two air dampers were controlled according to predetermined value. The coefficient of performance (COPhp

THE FORMATION OF LEGIONELLA DISEASE AND PRECATIONS IN BUILDING PLUMBING SYSTEMS

\rm CO{\rm P_{{\rm{hp}}}}

Performance analysis of a concentrated photovoltaic and thermal system

) values obtained were between 3.81 and 2.29. The specific moisture extraction rate for the whole system (SMERws

Solar-assisted fluidized bed dryer integrated with a heat pump for mint leaves

\rm SME{\rm R_{{\rm{ws}}}}

Thermodynamic analysis of PID temperature controlled heat pump system

) was between the 0.034 and 0.044 kg/kWh. The drying air temperatures were controlled with an accuracy of ±0.41°C to ±0.76°C depending on the mode of operation.