How much heat is required to heat 300 kg/h of ethylene glycol to steam?
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This post was last edited by ttvac on 2022-7-11 at 13:29. Hello, everyone. I have a device that is used to heat ethylene glycol from 20°C to steam at around 200°C. The heating medium used is heat transfer oil. How much heat is required? Natural gas is used for the heat transfer oil – how much natural gas is required approximately? Additional info: The heat transfer oil furnace I currently have is a natural gas furnace with a capacity of 38 million BTU. Please help calculate how many cubic meters of natural gas are required for the above purposes
The specific heat capacity of ethylene glycol is 2.35 J/(g·°C), its enthalpy of vaporization is 799.14 J/g, and its boiling point is 197.6°C. The required heat energy is Q=300*1000*2.35*（197.6-20）+300*1000*799.14=364950 Kj/h; if natural gas is used, approximately 10 Nm³/h is needed
The calculated amount of natural gas is 12 Nm3; how was the figure of 150 cubic meters for natural gas determined?
The calorific value of natural gas is 36.5 MJ/Nm3; considering efficiency, it’s around ten Nm3/h
100kw is the useful power; in actual operating conditions, a heater of 200Kw or more is required