2013-3-6 Learning Outcomes,cont. Demonstrate understanding of psychrometric terminology,including humidity ratio,relative humidity,mixture enthalpy,and dew point temperature. Use the psychrometric chart to represent common air-conditioning processes and to retrieve data. Apply mass,energy,and entropy balances to analyze air-conditioning processes and cooling towers. Describing Mixture Composition Consider a system consisting of a number of gases within a container of volume V.The te e perature and pressure of the gas mixture areand mixture can he des the numb by giving for each s m;or present ber of moles and molecular weightM e related by is in kmol when m;is in kg and M,is in kg/kmol. is in lbmol when m;is in (Eq.12.1) lb and M,is in Ib/lbmol. 22013-3-6 2 Learning Outcomes, cont. ►Demonstrate understanding of psychrometric terminology, including humidity ratio, relative humidity, mixture enthalpy, and dew point temperature. ►Use the psychrometric chart to represent common air-conditioning processes and to retrieve data. ►Apply mass, energy, and entropy balances to analyze air-conditioning processes and cooling towers. Describing Mixture Composition (Eq. 12.1) ►The mass mi , number of moles ni , and molecular weight Mi of component i are related by i i i M m n = ►Consider a system consisting of a number of gases within a container of volume V. The temperature and pressure of the gas mixture are T and p, respectively. ►The composition of the mixture can be described by giving the mass mi or the number of moles ni for each component present. ►ni is in kmol when mi is in kg and Mi is in kg/kmol. ►ni is in lbmol when mi is in lb and Mi is in lb/lbmol. Gas 1: n1, m1 Gas 2: n2, m2 Gas j: nj , mj Sum: n m …