Engineering, 11.02.2020 20:47 angela6844
A straight rectangular fin has a length of 3.5 cm and a thickness of 1.4 mm. The thermal conductivity is 55 W/m middot degree C. The fin is exposed to a convection environment at 20 degree C and h = 500 W/m^2 middot degree C. Calculate the maximum possible heat loss for a base temperature of 150 degree C. What is the actual heat loss for this base temperature? 4641, 1140; If h = 68 W/m^2 middot degree C. Calculate the maximum possible heat. What is the actual heat loss? 631.2, 380.8
Answers: 1
Engineering, 04.07.2019 18:10
Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.
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Engineering, 04.07.2019 18:10
Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges
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Engineering, 04.07.2019 18:20
Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.
Answers: 1
Engineering, 04.07.2019 19:10
Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?
Answers: 3
A straight rectangular fin has a length of 3.5 cm and a thickness of 1.4 mm. The thermal conductivit...
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