Question

Estimate the infiltration for both summer and winter at design condition for a two story house in Birmingham Municipal airport. The house has effective leakage area of 100 in2 and volume of 14,000 ft', with no obstruction or local shielding. Then determine for both seasons the following Sensible heat Latent heat and total heat 2) a) b) (40) T-Mobile LTE 11:43 PM design conditions_chart.pdf design conditions-chart. pdf ▼ Meaning of acronyms DB: Dry bulb temperature, MCWB: Mean coincident wet bulb temperature."F WB: Wet bulb temperature, F DP: Dew point temperature,"F MCDB Mean coincident dry bulb temperat Cooling DB/MCWB 1% Heating DB Lat Long Elev 0.4% 2% on ted States of America labama AUBURN-OPELIKA APT BIRMINGHAM MUNICIPAL AP CAIRNS AAF/OZARK DOTHAN MUNICIPAL GADSEN MUNI (AWOS HUNTSVILLE INTL/JONES FIELD MAXWELL AFB/MONTGOM MOBILE REGIONAL AP MONTGOMERY DANNELLY FIELD MUSCLE SHOALS REGIONAL AP TUSCALOOSA MUNICIPAL AP aska 2.62N 85.43W 774 23.7 27.7 93.0 73.5 90.7 73.7 89.5 73.6 3.56N 86.75W 63019.6 24.0 95.0 75.1 92.6 74.9 90.6 74.6 31.28N 85.72W299 26.9 30.3 95.4 76.4 93.4 76. 91.3 75.6 31.32N 85.45W 322 27.3 31.1 95.3 76.3 93.2 75.7 91.2 75.4 3.97N 86.08W 568 18.6 22. 93.4 74.7 91.2 74.5 89.9 74.3 4.64N 86.79W 643 17.0 216 94.6 75.1 92.2 74.7 90 74.2 2.38N 86.37 174 27.9 315 97.2 76.5 95.2 76.6 93.3 76.3 0.69N 88.25W 220 26.9 30.7 93.5 76.7 91.8 76.4 90.3 76.0 2.30N 86.39W203 23.7 27.3 962 76.5 94.0 76.1 92 75.8 4.75N 87.61W 56 17.8 22 95.5 75.4 93. 75.2 90.9 74.8 3.21N 87.62W187 20.6 25.0 95.7 76.5 93.4 76.3 914 76.0 l T-Mobile LTE 11:43 PM design conditions_chart.pdf design conditions_chart.pdf Elevatiom. ng HR: Humidity ratio, grains of moisture per lb of dry air WS: Wind speed, mph HDD and CDD 65: Annual heating and cooling degree-days, base 65 F, F-day perature, F Evaporation WB/MCDB Dehumidification DP/HRUMCDB Extreme Heat Cool. 1% ree-Days HDD CDD 65 0.4% Annual Ws 541 sites 544 more on CD-ROM II sites, 3 more on CD-ROAM 73.6 774 87.2 76.5 85.7 74.7 133.9 81.373.3 1274 79.8 17.55.2 12.8 2383 74.6 78.5 88.4 77.6 87.676.1 139.4 82.8 74.9 133.8 81.9 18.3 6.4 14.5 2693 75.6 80.3 89.6 79.1 88.377.8 146,1 83.7 768 1413 82.8 169 14.4 12.5 1767 754 80.1 89.3 78.8 87.977.5 144.9 83.4 767 140.7 82.6 19.2 7.5 1551727 4.3 78.0 88.8 77.0 87.774.9 33.4 83.7 73.3 126.5 82.0 67 142 12.33215 74.2 78.3 88.1 774 87.2 75.8 138.1 82.6 74.6 132.8 815 21.5 189 17.0 3140 76.380.5 90.8 79.6 89.978.0 146.3 85.0 77.0 141.3 84.218.0 15.6 13.1813 76.0 80.1 88.4 79.0 87.0779 46.0 83.4 769 1415 824 20.6 185 16.8 1662 75.8 79.7 90.8 78.5 89.2 76.7 140.3 84.4 75.8 135.8 833186 16.5 14.32143 74.8 78.7 89.1 77.8 88.2 76.0 138.6 82.9 75.0 134.0 82.0 187 68 14.6 3084 76.0 79.8 90.2 78.7 88977.1 142.2 83.6 75.9 136.5 82.975 14.8 13.0 2509 1859 1948 2415 2481 1557 1742 2598 2463 2282 1822 2101 7 sites, 66 more on CD-ROM Table 4 Basic Model Stack Coefficient Cs House Height (Stories) Iwo 0.0299 One T hree Stack coefficient 0.0150 0.0449 Table 5 Local Shelter Classes Shelter Class Description No obstructions or local shielding Typical shelter for an isolated rural house Typical shelter caused by other buildings across street from building under study Typical shelter for urban buildings on larger lots where sheltering obstacles are more than one building height away Typical shelter produced by buildings or other structures immediately adjacent (closer than one house height): e.g., neighboring houses on same side of street, trees, bushes, etc 4 Table 6 Basic Model Wind Coefficient C, House Height (Stories) Iwo 0.0157 0.0121 0.0086 0.0051 0.0016 Shelter Class One 0.0119 0.0092 0.0065 0.0039 0.0012 Three 0.0184 0.0143 0.0101 0.0060 0.0018 4 Table 7 Winter Air Exchange Rates (ACH) as Function of Airtightness Outdoor Design Temperature, ℉ Class Tight Medium 0.69 0.73 0.77 0.81 o.85 0.89 0.93 0.97 1.00 105 Loose Note: Values are for 15 mph wind and indoor temperature of 68 50 40 30 20 10 0-10 -20 -30 40 0.41 0.43 0.45 0.47 0.49 0.51 0.53 0.55 0.57 039 1.11 1.15 1.20 1.23 1.27 1.30 1.35 1.40 1.43 14

Answer 1

Given data E ective To be f nd 1) Sensible heat 2) Latent oat and total heat It s othinq But acciden ta enteunq aus nto a toom Bcstding it is a Lo called ad ain tec tteat t1an dua to this Consisc both Senai ble a well a latent heat In summey Cold-tioning gustemduo İn 2AMotton Consist bot Sensible uonte Ac Sysiem consi capauittes Latent heat whene a↓ Sensible eat

Summer! Ac with :nfLtゴatton:- ohesje → 9.toubarよ m hfg (Aus): Vo品hig (Wo-w ) △L be kueen humidity |specific. burn,ditg N 3606 Sec CH- AW change, pn hn( -) (0.5~2) V - g1o Volume m?)

B+0 e, F Total toad i) Sensible heat: Vo..CCp( ) To-T, X (14000) (o.045) ( 646) As 1124 806 A

4) Not total - Vo B Ah