U = Q/ATlmtd . Temperature(lmtd) = counter flow NTU = AU/Cmin Cmin = mCp ( R-134a , Cp =@ Tmean) ----> smaller than the water m = Q/Cp(Tout - Tin) ------> R134a NTU = 19.6 can you help me where did i get wrong?
-heat exchanger = condenser? -my professor want us to evaluate a product for shell and tube condenser and solve for efficiency. -A = pi*D*L*Nt , can we use D = shell dia. or only applicable for tube dia.? , L = tube length. Nt = no. of tube(s) -what's the use for subcooling? -the product indicates that Q = is condensing capacity. is it the Q= for the process? -unfortunately through my calculation NTU = 19.6, which is too big. NTU only ranges from 0-5 from the chart/graph for counterflow
it is not possible that the temperature of the cold fluid at the exit is greater than that of the temperature of the hot fluid at the exit in 'parallel flow arrangement...............but the same can be possible in counterflow arrangement..........
U = Q/ATlmtd . Temperature(lmtd) = counter flow
NTU = AU/Cmin
Cmin = mCp ( R-134a , Cp =@ Tmean) ----> smaller than the water
m = Q/Cp(Tout - Tin) ------> R134a
NTU = 19.6
can you help me where did i get wrong?
-heat exchanger = condenser?
-my professor want us to evaluate a product for shell and tube condenser and solve for efficiency.
-A = pi*D*L*Nt , can we use D = shell dia. or only applicable for tube dia.?
, L = tube length. Nt = no. of tube(s)
-what's the use for subcooling?
-the product indicates that Q = is condensing capacity. is it the Q= for the process?
-unfortunately through my calculation NTU = 19.6, which is too big. NTU only ranges from 0-5 from the chart/graph for counterflow
it is not possible that the temperature of the cold fluid at the exit is greater than that of the temperature of the hot fluid at the exit in 'parallel flow arrangement...............but the same can be possible in counterflow arrangement..........
True. The problem statement is not feasible and this is proven during the screencast.
There are two different things whose symbols are both C. Very confusing