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A hot water boiler is fired with natural gas and has an efficiency of 83%, that is, only 83% of the heat released in the

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A hot water boiler is fired with natural gas and has an efficiency of 83%, that is, only 83% of the heat released in the combustion of the fuel is available to heat water. In one hour the boiler consumes 512m3 of natural gas. Water enters the boiler at 75C and leaves at 96C. Calculate the water circulation rate in kg/h. Use cw=4.2kJ/kgC and (H.V.) for natural gas =36200kJ/m3

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