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**** ** Energy ******** Heat ********************* ************* *********** ******** ********** *** * heat recovery **** can be calculated ***** = *** * t1) / (t3 * *** whereμt = *********** ******** ************ = *********** ** ******* make-up air ****** *** heat ********* *** ***** * *********** ** ******* make-up *** ***** *** **** exchanger *** oF)t3 * *********** ** ****** *** before the **** ********* *** oF)That ****** * ****************** * ************ ************* moisture ******** efficiency *** * **** recovery **** *** ** calculated asμm * *** - x1) / *** - x1)whereμm * ******** transfer ************ = ******** ******* ******* *** ****** the **** ********* ****** ************ * moisture outside ******* *** ***** the **** exchanger (kg/kg ************ * ******** outlet air before *** **** exchanger (kg/kg ************** is;μm * ********* (12-10)μm * *********** efficiencyThe ******** ******** ********** *** a **** ******** **** *** ** ********** ***** * *** * h1) / (h3 * *** ******** * ******** transfer ************ * ******** ** outside ******* air before *** **** exchanger ****** Btu/lb)h2 * ******** ** ******* ******* *** ***** *** **** ********* ****** Btu/lb)h3 * ******** ** ****** *** ****** *** **** ********* (kJ/kg ********** * ********* ************ * 15Therefore;625 * ********* (15+632214)141cm^2No ** **** * ********