Questions to ask when evaluating the use of waste gases for heating secondary processes include:
- Is there a less expensive way to heat the secondary process?
- Is the temperature of the flue gases high enough to heat the secondary process?
- Do the flue gases contain enough transferable energy?
- Are the flue gases compatible with the secondary process (as to cleanliness, corrosiveness, etc.)?
- Can the primary process deliver energy to the secondary process in time?
- Are the two processes close enough together to avoid excessive heat losses during waste gas transport?
- Will the flue gases leave the secondary process at a high enough temperature to avoid problems with moisture condensation?
- Can the exhaust ductwork and secondary process be designed to avoid excessive pressure resistance to the flue gases, or are additional means like exhaust fans necessary?
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