Engineering, 21.05.2020 19:01 itzhari101

A solar collector arrays has been installed on a roof of a residential home. Each panel can be assumed to flat and has a surface area of approximately 2.5 m2 . The panel is relatively thin (0.7 cm) and has a reported thermal conductivity of 0.65 W/m C. The vendor documentation claims that both convection and radiation modes of heat transfer will contribute to rejected heat from the surface of the panel. Convection heat loss can be assumed to occur under natural conditions. If temperature of the inner and outer surfaces of the panel has been estimated to be 27 C and 24 C, set up the energy bal calculated the heat lost from the panel attributed to radiation heat transfer on an average spring day.

Answers: 2

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Answers: 1

Answer

Engineering, 04.07.2019 18:10

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0

Answers: 3

Answer

Engineering, 04.07.2019 19:20

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2

Answers: 2

Answer

Engineering, 04.07.2019 19:20

Aseries piping system conveys methyl alcohol. the system consists of 70 m of 1- nominal pipe follow by 50 m of 2-nominal pipe, both schedule 40 commercial steel. the 1-nominal pipe contains 3 90° elbows (regular) anda fully open gate valve, all threaded. the pressure drop through the system is 150 kpa. determine the volume flow rate through the system that is horizontally laid.

Answers: 1

Answer

You know the right answer?

A solar collector arrays has been installed on a roof of a residential home. Each panel can be assum...

Questions