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...Chapter heat transfer processes overall coefficient thermal conduction augmentation radiation exchangers convection symbols eat is energy in transit because of a temperature dif fourier s law for hference the transferred from one region to another by three modes and t among group transport phe q k nomena that includes mass see momentum x electrical where have similar rate equations which flux proportional potential difference convec per unit area btu h ft tion gradient f are often considered together conductivity their similarities interrelationship many common magnitude direction directly pro physical portional proportionality fac this presents elementary principles single phase tor minus sign indicates with emphasis on hvac applications boiling flows decreasing if condensation discussed more specific information steady dimensional uniform over surface integrating or buildings refrigerated spaces can be equation yields found chapters through volume ashrae handbook refrigeration proper...