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8. 9. Volume: 06 Issue: 04 | Apr 2019 www.irjet.net When both temperature sensors reach 150°C the heater and pump are turned off Pressure gauges are frequently checked for any abrupt pressure changes p-ISSN: 2395-0072 10. After the voltage measurements are obtained, the pump is turned off and the gateway valve is closed International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 3.2STORING PHASE The end of the charging phase initiates the second phase of the system. To proceed in obtaining data for the standby phase of the experimental process the following practice is followed: 1. Since the pump and heater are turned off, the gateway valve is also turned off 2. The room temperature (22°C ) is measured using a digital thermometer 3. Every two minutes the temperature read by the sensors is recorded 3.3DISCHARGING PHASE To proceed in obtaining data for the last phase of the experimental process the following practice is followed: 1. The gateway-valve is opened to allow the HTF to flow through the system 2. The motor that is connected to the pump is turned on 3. Both pressure sensors will indicate the operating pressure of the oil 4. Every ten seconds the temperature read by the sensors is recorded 5. After a certain period, in which the temperatures measured by the two sensors are almost equal the first stage will be complete 6. The temperature of the oil tank’s bottom surface is measured 7. The cooling fan is connected to a battery, in order to prepare the cooling for the Peltier 8. The Peltier element is inserted between the oil tank’s hot bottom surface and the extended cold surface of the cooling mechanism 9. The temperature read by the voltmeter is recorded • • The temperature of the oil and sand at the start of the experiment was measured to be 30°C and 33°C respectively. The final temperature of 152°C for the oil, and 153°C for the sand were achieved at 58 minutes from the start of the phase 4. RESULT AND EXPERIMENTATION; CHARGING PHASE • • The temperature of the oil and sand at the start of the experiment was measured to be 152°C and 153°C respectively. At the end of the five-hour period the temperature of the oil had dropped to 50°C, while sand’s decreased to 91°C. It should be noted that the storing time is measured from the end of the charging phase. Chart 4 4.1 RESULT AND EXPERIMENTATION; STORING PHASE Chart 4.1 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 3581PDF Image | Heat Storing Sand Battery
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