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mink_man
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Homework Statement
4. ANALYSIS
The Excel Data File will allow the following analysis to be conducted for both emitter types:
a) Calculate the variation in both the temperature drop across the emitter ( T) and total heat emitted (Q) over the entire test period for each of the 3 radiator and 4 floor types
b) Use plots of the variation in the flow/return temperature, temperature drop, and heat emitted over the entire test period to compare the performance of the 3 radiator types
c) Use plots of the variation in the flow/return temperature, temperature drop, and heat emitted over the entire test period to compare the performance of the 4 floor segments
d) Use plots of the variation in the heat flux at the heated floor/sub floor and heated floor/external wall interfaces to compare the performance of the 4 floor segment by conducting a heat balance on each floor segment. Assume only 3 heat flow paths (+Y up, -Y down, and +Z out)
Basically comparing 3 radiators and 4 underfloor systems.
The Attempt at a Solution
I have done mc delta t for the rads, but how do I calculate the heat flux for the underfloor. Is it the delta t between the inlet and outlet or inlet and floor temp?
Also what is a heat balance and how do I calculate the time constant?
Any other tips or sites to get info? :) Thanks :)