(a) caen← fid the heat lost through he nside tempaalva S 25 C and ena is...
At what rate is heat lost through a 1.5 m x 3.0 m rectangular glass windowpane that is 0.4 cm thick when the inside temperature is 29 °C and the outside temperature is 8.0 °C? The thermal conductivity for the glass is 0.75 W/( m.Cº).
(a) Calculate the rate of heat conduction (in w) through a double-paned window that has a s.00 m2 area and is made of two panes of 0.700 cm thick glass separated by a 1.00 cm air gap. The nside surface temperature is 16.0*C, while that on the outside is-1S.0 C (Hnt: There are identical temperature drops across the two glass panes. First find these and then the temperature drop across the ar gap. This problem ignores the increased heat transfer...
25 PRR HEAT TRANSFER NAME: UNIT SIX AND SEVEN EXCHANGERS BOILING AND CONDENSATION, He- Solve the following problems: 1. In a gas-faired boiler, water is boiler at 150 C by hot gases flowing through 59 m long, 5 cm outer diameter mechanically polished stailess-stell pipes submerged in water, If the outer surface temperature of the pipes is 180 °C. determine (a) the rate of heat transfer from the hot gases to water. (b) the rate of evaporation, (c) the ratio...
In this problem, you will estimate the heat lost by a typical house, assuming that the temperature inside is Tin=20∘C and the temperature outside is Tout=0∘C. The walls and uppermost ceiling of a typical house are supported by 2×6 inch wooden beams (kwood=0.12W/(mK)) with fiberglass insulation (kins=0.04W/(mK)) in between. The thickness of the wall is Lwall=18cm allowing for interior and exterior covering. Assume that the house is a cube of length L=9.0m on a side. Approximate that the roof has...
Find the heat-loss rate through a slab of wood 1.5 cm thick, if one surface is at 25 °C and the other at 5.0°C. Find the heat-loss rate through a slab of Styrofoam 1.5 cm thick, if one surface is at 25 °C and the other at 5.0°C.
Water flowing at a rate of 10 kg/s through 50 tubes in a double-pass shell-and-tube heat exchanger heats air which flows on the shell side. The tubes are bras with outside diameter of 2.6 cm and are 6.7m long. The heat transfer coefficients on the inside and outside tube surfaces are 470 W/m2K and 210 W/m2K, respectively. Air enters the unit at 15°C with a flow rate of 16 kg/s. The entering water temperature is 350K. A) Draw and label...
You add 50 g of ice at –5° C to 200 g of water at 25° C. What is the final temperature of the mixture, assuming that no heat is lost to the outside? Please answer this in a simple step by step process so that I can understand.
In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, which dominates the heat conduction properties of the wall So we can consider the wall to have a thermal conductivity of k(wall) = 0.048 W/m/K . We will take the thickness of the walls and ceiling to be L(wall) = 12...
Heat flux through wood board = 150 W/m² for temperature difference of 25°C between the two surfaces as shown below. Find thermal conductivity of wood. T(x) T: 1. 2 cm
A student has calibrated his/her calorimeter and finds the heat capacity to be 14.2 J/°C. S/he then determines the molar heat capacity of aluminum. The data are: 24.9 g Al at 100.0°C are put into the calorimeter, which contains 99.5 g H2O at 18.4°C. The final temperature comes to 22.4°C. Calculate the heat capacity of Al in J/mol·°C.