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...Heat transfer heaheatt in food processingin processing lecture note itp purwiyatno hariyadi phariyadi staff ipb ac id dept of science technology faculty agricultural engineering bogor university ttransfer ransfer mmovement energyovement energy due to a temperature differencedifference can onlycan only occur if aa difference exists occurs through conduction convection aandnd radiation oor r combination aboveof above maymay be indicated as total identified bbyy flowheat flow q wwiith th units oof btuf btu rate flowrate or t wwiithth wof watts atts oot hrt hr also mayalso may expressed per unit area flux mayransfer classified steady state o all factors are stabilized wwitith h respect timerespect time temperatures constant at locationslocations steadyo is sometimes assumed little error resultsresults unsteady transient wheat when hen changes wo wiithth ttime ime thermal fprocessing foods an important oods exampleexample must knowo know required for the coldest spot reach set temperatureca...