3 research outputs found
An Evaluation of Heat Exchangers Using System Information and PEC
This report describes analyses aimed at integrating component optimization and
system design by developing heat-exchanger performance evaluation criteria (PEC) that
account for the system-level performance impacts of heat exchanger design. It builds on
earlier studies that used relatively simple PEC to capture some of the component-level
tradeoffs, but which usually ignore the system impact of component design. This report
evaluates four PEC-j/f, heat transfer/pumping power (8), heat transfer/(pumping +
compressor power) (n), and system COP. It is shown that j/f and 8 are better used as
comparison criteria for existing heat exchangers of equal heat duty rather than as design
criteria. The other two PEC, n and COP, include the system effect of compressor
efficiency and therefore can be used more effectively in heat exchanger and system
design. Through a combination of PEC and system optimization techniques, a method is
developed to evaluate and design heat exchangers for maximum system performance.Air Conditioning and Refrigeration Project 9