Problem 3.(30 pts) A building has walls that are 6 m high. The walls are constru

Question

Problem 3.(30 pts) A building has walls that are 6 m high. The walls are constructed of 100- mm bricks and gypsum boards on the inside. Between the bricks and the gypsum boards is an air space. The roof is made of asphalt shingles and gypsum boards on the inside. Between the roof shingles and the gypsum boards is an of the wall area that are distributed equally on the four walls. The total floor area is 1000 m, and the floor is well-insulated from the ground. The total wall area is 1200 , and the roof be assumed horizontal. The ACH for the zone is 0.7/hr, and the zone temperature is design temperature of -25°C, determine (a) the envelope loss coefficient for the building (b) the heating load for the building Use cp = 1.003 kJ/kg-K and = 1.42 kg/m3 for the air airspace. There are single-pane windows comprising 20% can 20°C. For a

Explanation / Answer

Given data:

Zone temperature=20 degrees,

Total wall area=1200sqm

Total floor area=1000sqm

ACH =0.7/hr

Design temperature=25degrees

Cp=1.003KJ/kgK, density of air-1.42kg/m3,

20% considered

a) Envelop loss coefficient= (1200)/(25-20)*1000=0.24

b) Heating load=ACH*cp*0.2**density*height of building*area of wall=1435.6 KW

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.