Question

uestion 2 Moist air, saturated at 5°C, enters a heating coil at a rate of 10 m'/s. Air leaves the coil with of h2-50 kJ/kgda. i an enthalpy a) Find each of the initial and final states the dry and wet temperatures, dew point, relative humidity, humidity ratio, specific volume. b) Imagine a simple transformation to reach a dry temperature of 25°C and a relative humidity of 50%. What is the nature of this transformation? What is the required heat in this transformation? n r Tables Vertical wall in wi Horizontal wall in contact with the ground (Hoor of a heated space, buried) all adjoining to an unheated room (garage, sh Wall in contact with the outside Space category contact with the ground (Cwall of a heated room, buried) าร ed, cellar) Table 1: ai coefficient with space category Colors and nature of the surface 0.4 White stone white, clear or cream surface very light Very clear surfaces cement single glazing double glazing triple glazing Glasses (windows or skylights) 0.9 0.8 Table 2: Absorption coefficient"a" for walls, roofs and windows U heat transmission coefficient of the F Solar radiation coefficient considered wall or window [W/m2 C 0 0.05 0.1 0.15 0.20 Table 3: Solar radiation factor F Proteeted windows Canvas exterior blinds Colors Aluminum 0.22 Table 4: Reduction factor "g" for protected windows Minimum fresh air Density of flowrate for smoking area [m3/h/persom Designation of the locals Minimum fresh air flowrate for non- smoking area [m3/h/person occupation person/m2] Page | 1 1/4 Offices and similar locals Mecting rooms, show Shops, supermark ets rate required in air-conditioned by type of locals power gain to admit w Utilization device Nominal power [w Uc (%) heat Stereophonic channel TV 175 175 Table 6:Power of devices in Watts Local interior space) temperature Total heat Emission Location Tw] I'C] 25 "C 27"С SHE LHE SHE LHE 60 42 102 Sitting at rest School, 65 37 theater Office, hotel, apartment 49 56 60 116 67 Light work Stand up, slow ,Store, shop→ 68 | 63 | 57 | 74 walk 131 84 GA97 64 161 Meal Restaurant Table 7: heat emitted from the body of an adult man (person) Connected power [W/m2] Nature of the local and activity Incandescent Fluorescent lamp Page

Answer 1

Given that SC the fellosina values ore bakenc matic ckort at s c chromatic cļort at SoC Satuation oo y imib ly

then Top 48 Since Al -hese values are taken fom the psychomelsi chat Given log-,&% omeic Chat t Hece, is onsema tin ic sensibe heakil by latent S099-18-611 31,679 비 0.794 ㎡ 5089 Latent -) a 느 31,679 x 1859 Sensible heab 398.98