Hi,
can anybody help if i heat exchangers effectiveness is closer to 1 does this make it more efficient, for example a heat exchanger with a effectiveness of 0.8 is more efficient than one with 0.7 effectiveness???
Cheers i've managed to figure it out.
St can be found by reading teh StPr2/3 from the graph. this figure is the divided by the free flow frontal area (σ) of the surface to determine the value for St
Hi,
i'm currently trying to size a heat exchanger and have been using Kays and London as a reference book. i have come across a calculation for the heat transfer coefficient:
h = StGCp where St = the Stanton number, G = mass velocity and Cp = specific heat.
In the text book it shows that StPr...
hi,
i'm currently trying to spec a heat exchanger for a cooling system as part of the calcs i have to work out the overall heat transfer coefficient using 1/U = 1/h1 + b/k = 1/h2 where h is the local heat transfer coefficient b is the breadth and k is the thermal conductivity of the material...
