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Calculate the Quantity of Heat Passing Through a Stainless Steel Dish Questions
(Q1) Calculate the quantity of heat passing through a stainless steel dish whose effective area is 200 cm2 and whose thickness is 4 mm in a period of 5 minutes, if the temperature of the outer and inner surfaces of the dish are 100°C and 80°C respectively & Kd = 19 w m-1 k -1 .
(Q2) Calculate the mass of condensed steam that produces a quantity of heat using a stainless steel dish whose effective area is 200 cm2 and whose thickness is 2 mm in a period of 5 minutes, if the temperature of the outer and inner surfaces of the dish are 100°C and 80°C respectively & Kd = 19 w m-1 k -1.
(Q3) A steam-jacketed vessel having an area of 4 m2 was heated with a circulating steam having a temperature of 115°C. An 8 kg of condensed steam has been used to heat up the jacket during a period of 30 minutes to reach a temperature of 100°C. Calculate the overall heat transfer coefficient (OHTC), if the latent heat of evaporation of water is 2.24 MJ/kg.
(Q4)
(a) What is the total amount of heat energy required to produce 13 kg of steam at 120.4°C (generated at 2-bar pressure) from water at 18.4°C? The specific heat capacity of water is 4.2 KJ/ kg. K & the latent heat of evaporation is 2.24 MJ/Kg.
(b) What temperature would be reached, if the steam produced in question 1 is used in steam jacketed vessel to heat 150 kg of water whose initial temperature was 21.8°C?
