Question

3. A composite wall separates combustion gases at 2600°C on the one side from a liquid coolant at 100°C from another side. The gas- and liquid-side convection coefficients are 50 and 1000 W/m²K. The wall is composed of a 10-mm-thick layer of chrome brick (Table A3) on the gas side and a 20-mm-thick slab of stainless steel (AISI 304) on the liquid side. The contact resistance between the brick and the steel is 0.05 m² K/W. 3.1 Draw the electric circuit analogy of the process. Indicate temperatures and resistances. 3.2 Ignore radiation heat transfer and compute the heat loss per unit surface area of the composite wall? 3.3 If the water side is changed to air with heat transfer coefficient of 1500 W/m²*K will the heat transfer per unit drop? Show your calculations and compare with 3.2.

          3. A composite wall separates combustion gases at 2600°C on the one side from a liquid
coolant at 100°C from another side. The gas- and liquid-side convection coefficients are
50 and 1000 W/m²K. The wall is composed of a 10-mm-thick layer of chrome brick
(Table A3) on the gas side and a 20-mm-thick slab of stainless steel (AISI 304) on the
liquid side. The contact resistance between the brick and the steel is 0.05 m² K/W.

3.1 Draw the electric circuit analogy of the process. Indicate temperatures and
resistances.

3.2 Ignore radiation heat transfer and compute the heat loss per unit surface area of the
composite wall?

3.3 If the water side is changed to air with heat transfer coefficient of 1500 W/m²*K will
the heat transfer per unit drop? Show your calculations and compare with 3.2.

3. A composite wall separates combustion gases at 2600°C on the one side from a liquid
coolant at 100°C from another side. The gas- and liquid-side convection coefficients are
50 and 1000 W/m²K. The wall is composed of a 10-mm-thick layer of chrome brick
(Table A3) on the gas side and a 20-mm-thick slab of stainless steel (AISI 304) on the
liquid side. The contact resistance between the brick and the steel is 0.05 m² K/W.

3.1 Draw the electric circuit analogy of the process. Indicate temperatures and
resistances.

3.2 Ignore radiation heat transfer and compute the heat loss per unit surface area of the
composite wall?

3.3 If the water side is changed to air with heat transfer coefficient of 1500 W/m²*K will
the heat transfer per unit drop? Show your calculations and compare with 3.2.

Added by Sandy M.

Question

Please give Ace some feedback