Engineering, 22.11.2019 22:31 Reijected

There are two thin plates with the length of 2 m and width of 1 m, placed in parallel with the distance of 1 m inside a large room. the ambient temperature is 27℃. we can assume that the backsides of the plates are well insulated and have no heat loss. temperature and emissivity for plate 1 are t1 = 827℃ and ε1 = 0.2; temperature and emissivity for plate 2 are t2 = 327℃ and ε2 = 0.5. calculate the net radiation heat losses per unit time for plate 1 and plate 2, respectively; and calculate the radiation energy absorbed by the large room in a unit time.

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Answers: 2

Answer

Engineering, 04.07.2019 18:10

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Answers: 3

Answer

Engineering, 04.07.2019 18:10

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.

Answers: 2

Answer

Engineering, 04.07.2019 18:10

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan

Answers: 3

Answer

You know the right answer?

There are two thin plates with the length of 2 m and width of 1 m, placed in parallel with the dista...

Questions