Answers: 1
Physics, 22.06.2019 03:00
An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt,c and rt,h, and qin, as where rtot rt,c rt,h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc,n 0.05 k/w and rh,n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh,d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th,i tc,i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc
Answers: 2
Physics, 22.06.2019 07:30
Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?
Answers: 1
Physics, 22.06.2019 19:50
State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory
Answers: 1
Physics, 22.06.2019 20:00
Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?
Answers: 1
The statue of liberty is made out of copper and was once shiny and copper-colored. over the years, t...
Mathematics, 17.09.2020 01:01
Spanish, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Social Studies, 17.09.2020 01:01
English, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
English, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Geography, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01
Mathematics, 17.09.2020 01:01