Appendix

For heat transfer in a typical PHE with turbulent flow one can write the heat transfer performance in terms of a di-mensionless Dittus—Boelter equation

For applications in turbulent flow it is usually sufficiently accurate to omit the Sieder—Tate viscosity ratio and therefore the equation reduces to

tions to eliminate Af, it is possible to arrive at equation A8 for the film heat-transfer coefficient.

where and

2.5 po z 2gpAP

The pressure drop can be predicted in a similar exchanger by equations A3 and A4.

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Homemade Pet Food Secrets

It is a well known fact that homemade food is always a healthier option for pets when compared to the market packed food. The increasing hazards to the health of the pets have made pet owners stick to containment of commercial pet food. The basic fundamentals of health for human beings are applicable for pets also.

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