Shell and Tube Exchangers
Shell and Tube Exchangers
Copyright By PowCoder代写 加微信 powcoder
Plate and Frame Heat Exchanger
Fin Fan Cooler
Double Pipe Heat Exchanger
Cross Flow Heat Exchanger
Key Issues Governing Heat Transfer
Temperature difference between hot and cold streams
Heat transfer area
Flow arrangement (turbulence, friction – fluid mechanical issues)
Design requirements (heater vs cooler, phase change, operating pressure, maintenance needs)
Fouling of heat exchanger (additional “resistance”)
Goal of heat exchanger analysis
What is the “duty” of the heat exchanger (heat transfer rate required)
What surface area is required, and therefore how big does the exchanger need to be?
What outlet temperatures need to be met?
What is the effect of fouling on the heat exchanger and how does this affect plant efficiency, emissions, cost, etc
How often is maintenance required?
Two analytical approaches:
LMTD Method: known outlet temperatures
Effectiveness–NTU: unknown outlet temperatures
/docProps/thumbnail.jpeg
程序代写 CS代考 加微信: powcoder QQ: 1823890830 Email: powcoder@163.com