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Hybrid Plants for Thermal Energy Production
Published in Dimitris Al. Katsaprakakis, Power Plant Synthesis, 2020
By integrating this time-series, the annual final thermal energy demand is calculated at 32,356 kWh. If this thermal energy demand is undertaken by a conventional diesel oil heater, by assuming average efficiency of 80% for the heater, 88% for the heat distribution network, and 92% for the heating radiators, and by adopting the value of 10.25 kWh/L as the heat capacity of diesel oil, the annual diesel oil consumption is calculated as: 32,356 kWh/0.80 x 0.88 x 0.92 x 10.25 kWh/L= 4,874 L
Low Temperature Stripping of Volatile Compounds
Published in Edward J. Calabrese, Paul T. Kostecki, Principles and Practices for Petroleum Contaminated Soils, 2019
Luis A. Velazquez, John W. Noland
A 6 million BTU/hr hot oil heater is used to provide the required heat for the process. The oil is heated to 640°F and then circulated through the thermal processor. The oil is heated by the combustion offgases from the burner of the heater. A portion of these offgases are directed through the enclosures above the screws to provide an inert atmosphere in the units (i.e., to avoid reaching the lower explosive limit [LEL] of contaminants in air) and to maintain a discharge offgas temperature of 280°F to avoid the formation of condensate in the units.
Geothermal Energy
Published in Sergio C. Capareda, Introduction to Renewable Energy Conversions, 2019
A heat pump using Freon 12 as its refrigerant was used to meet the heating requirements of a facility and maintain its temperature at 120°F [48.9°C]. The outdoor temperature was 40°F [4.44°C]. The compressor efficiency was 80%. The heating requirements are 90,000 Btu/hr [29.3 kW]. The electricity cost was 0.10/kWh. Compare the cost of operating this heat pump with that of a fuel oil heater that would cost $25 per 106 Btu [$23.70 per 106 kJ]. Assume a 70% efficient oil heater. Find the COP as well.
A novel wavy chevron design for plate heat exchangers: experimental and numerical analysis
Published in Chemical Engineering Communications, 2023
Alireza Farshidian Far, Kazem Bashirnezhad, Peyman Bashi Shahabi, Javad Jahanpour
The schematic diagram of the experimental setup is given in Figure 2. A centrifugal pump is used to circulate the flow in a closed loop. The working fluid is water passing through a globe valve to control the flow rate. An electromagnetic flow-meter type Burkert 8045 with the accuracy of 0.5 LPM is also applied to determine the flow rate. The Wika type S10 pressure transmitter with the precision of 0.07 bar measured the pressure drop between the inlet and outlet ports of PHE. Besides, the experimental setup is equipped with the RTD temperature sensor Wika type TR10 to measure temperature with an accuracy of 0.1 °C. The deviation of the temperature and the pressure drop is recorded for different flow rates. The heat source is provided by an industrial oil heater. Moreover, a cooling tower provides the cooling demand of the test rig.