A two-story building of volume of 540 m3 has an effective air leakage area of 510 cm2. The outdoor and indoor design temperatures for winter conditions are í10°C and 20°C respectively. The average design wind speed is 7msí1. The house is sheltered by other houses across the street. Estimate (i) the air infiltration rate, and (ii) the air exchange rate

A two-story building of volume of 540 m3 has an effective air leakage area of 510 cm2. The outdoor and indoor design temperatures for winter conditions are í10°C and 20°C respectively. The average design wind speed is 7msí1. The house is sheltered by other houses across the street. Estimate (i) the air infiltration rate, and (ii) the air exchange rate

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter11: Temperature And Temperature- Related Variables In Engineering

Section: Chapter Questions

Problem 27P

See similar textbooks

Similar questions

5-20 A single-family detached residence of moderate construction has a total sensible load of 53 300 Btu/hr. The design humidity ratio is 0.021 Ib of vapor/lb of dry air. a. Determine the latent load. b. Determine the total cooling load.
b.) calculate the outside air flow for the restaurant dining area where cold air is supplied from the ceiling, lit/sec
For an air-conditioning system, the outdoor and indoor design dry bulb temperatures are 45°C and 25°C respectively. The space to be air-conditioned Is 20m x 30m x 5m and infiltration is estimated to be one alr are 1.2 (kg of dry air)/m³ and 1.02 kJ/(kg of dry air) °C, then the sensible heat load due to Infiltration is, nearly
15. A room dimensions 10 x 8 x 3 m is maintained at 22 °C and 50% RH and has a total heating load of 12 kW. The room is provided with eight air changes per hour when ambient conditions are 32°C and 60% RH. Determine; a. Total cooling load; b. Moisture removed per hour; c. Minimum diameter of the fresh air duct so that the velocity in the duct does not exceed 3 m/s.
A commercial building is built on a slab on grade foundation that is a 40 m by 18 m rectangular shape. Assume the outside design temperature is -15°C. Determine the rate of heat loss through the exterior edge of a concrete slab, a. For an uninsulated slab edge perimeter. b. For a slab edge perimeter insulated with 25 mm of perimeter insulation (an RSI-value of about 0.44).
Compute the cooling load for the south windows on a middle floor of an office building that has no external shading. The windows are the insulating type with regular plate glass inside and out. Drapes with a reflectance of 0.2 and transmit- tance of 0.5 are fully closed. The total window area is 400 ft². Assume that the indoor temperature is 78 F and the outdoor temperatures are 100 F in July with a 22 deg F daily range. Make the calculation for 12:00 noon at 36 deg N latitude. To determine the zone type, make assumptions for a modern office building. d
Q4/ Determine the heat transfer rate for the following parallel-flow heat exchanger specification Cold flow enters at 40-C, Cc= 20,000 W/K. Hot water enters at 150 -C, Ch= 10,000 W/K A-30/m², U-500 W/m². k.
A room is to be maintained at 25°C dry bulb temperature and 55% relative humidity under the following conditions: the outdoor conditions (34°C DBT and 30°C WBT); Sensible and latent heat load of the persons and infiltration in the room are 5100 W and 3400 W respectively; the air is 1250 m/h and the mass of the fresh air is 5000 kg/h. (Take SHG for glass and light 2300 W and 1.2 kW respectively). By using psychometric chart, calculate: (a) the sensible heat factor. (b) Grand total heat. (Where: DBT= Dry Bulb Temp. ;WBT=Wet Bulb Temp. ; and SHG-Sensible Heat Gain)
Q4: Consider the heat flow in one direction (x-axis) through the composite wall shown in Figure Q4. Draw the thermal circuit then determine T1 and T2, and the heat flux (q, W/m2), knowing that the thermal conductivity of the Fir (0.11 W/m.°C), the concrete cinder block (0.76 W/m.°C), the building brick (0.69 W/m.°C) and the yellow pine (0.147 W/m.°C). Consider also the concrete cinder block and building brick sections are of equal thickness.
7.13 A small parts assembly area in a factory has a working force of 25 men and occupies a space 27.4 by 9.1 mwith a 3 m ceiling. Smoking is not allowed. Determinea. Sensible heat load from the occupantsb. Latent heat load from the occupantsc. Moisture added from the occupantsd. The minimum volume of outdoor air for ventilatione. Suitable summer design inside dry-bulb temperature
Inside a wall measuring N/Sx N /3m, there are 2(glass thickness lcm) single-glazed windows measuring 1.5 m x 3 m with a heat transfer coefficient of K there is a window. The ambient temperature on the inside of the wall is N20C, the outdoor temperature is - N3 oC, the coefficients of external and internal convection are aş= N W/m2 C, aic = N/3 W/m2 C is. The wall is from the outside to the inside, 0.1N cm. the outer plaster with a thickness of k= 0.3N W/ moC, with a thickness of N/ 2 cm k = 0.8 W/moC reinforced concrete is composed of 1 cm thick k= 0.6 W/m oC gypsum honey inner plaster.Find out the total heat loss. To reduce heat loss by 80%, k= How many cm of insulating(styrofoam) material with an oC of 0.001(N+N2 )W/m should be N=26 used(calculations will be made for single and double glazing. My greatest achievement please heap the required amount of flow before and after it is made N2=9 N3=119
I need the answer as soon as possible