Recent content by TheDon

would the eqn h=k/d work? i saw it in wikipedia

does Pr vary depeding on what temperature it is at? if so is there a table to show these value

The problem states: A vapor compression regrigeration system using r134a is being designed for a household food freezer. The refrigeration system must maintain a temp. of 0F within the freezer compartment when the temp of the room is 90F. Under these conditions, the steady state heat...

we arent given anything else to use. the problem says Select a matierial and tube size for the condenser tubing an estimate the total condesor tube length. I heard from a couple ppl in class about that equation with h in it and you can solve for L. But from what i understand you have to...

But i heard from a few ppl that you have to choose temperatures above the hot region and below the cold region i believe due to efficiencies since no cycle is 100% efficient. The compressor power can be found from the eqn W=m(h2-h1) I took the 1500btu/hr and converted that to .4396 kj/s and...

heat transfer is next semester. The problem can get very indepth but the design is supposed to be simple. I just need to know what temperatures i should design it for and how to calculate the h for that above equation. I can find the mass flow rate from the eqn Qin=m(h1-h4) since Qin is given...

the fluid is r-134a also

I am doing a project for my thermodynamics class and we have to choose a compressor for a a vapor compression refrigeration cycle that has a heat transfer rate of 1500 btu/h and must maintain 0F in the freezer when the room temp is 90F. I have went through some calculations to find the mass flow...