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.

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.

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

Calculate the total cooling load for a building at 32° North latitude at time 14 on 21 of August, outdoor design temperature 35 °C, daily range DR = 11.1 deg ⁰C and indoor design temperature 25.5°C. The building has the following data: A-The ceiling is constructed from 152.4 mm lightweight concrete (I.W concrete) and without a suspended ceiling, dark colour (k = 1) and no mechanical ventilation (f = 1) . Area= 25 m². B-South window consists of 3 mm one layer without internal shading, area=4 m², U = 4.5 W/m2 °C. Assume shading coefficient SC = 1 and cooling load temperature difference CLTD=7 °C and cooling load factor CLF=0.55. C- West wall is constructed from 101.6 mm heavyweight concrete wall+finish (H.W. concrete wall+Finish) (group E) and medium colour (k = 0.83) Area= 17.5 m². D-There is another window that has one hinge that causes an infiltration rate of 5 L/(s.m) of infiltrated air. The moving window has a height of 1.5 m and a width of 1 m. E- Four occupants in the…
Find the heat load for an upstairs 14-foot by 12-foot bedroom that is not onthe corner of the house. The outside wall, the 14-foot wall, has 31⁄2 inches ofinsulation. The walls are 8 feet high, and there are two single pane windowsin that outside wall that are 4 feet 5 inches high by 3 feet wide. The ceilinghas insulation 6 inches thick. The house has a design temperature differenceof 70°F.
Find the heat load for the following side of a house for a 70°F design temperaturedifference. The wall is a wood frame with siding and 31⁄2 inches of insulation. The windowis double pane.
Do a quick calculation of the thermal conductance (U value) across a cavity wall consisting of:1. Outer skin 220mm brickwork (North facing, exposed aspect) 2. 20mmcavity 3. Inner skin of 10mm plasterboard Compare this with the worked example of an insulated brick veneer wall in the worked example. Show your working.
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 per hour.
A warehouse measures 40 feet by 50 feet and has 20-foot-high walls. Thewarehouse was built on a concrete slab and has 6 inches of insulation inthe wood frame walls and 91⁄2 inches in the ceiling. There are no windowsin the building, and the door is made just like the walls. What is the heat loadfor this warehouse in an area where there is a 75°F design temperaturedifference?
b.) calculate the outside air flow for the restaurant dining area where cold air is supplied from the ceiling, lit/sec
Specify an acceptable amount of outdoor air for ventilation of the following: a) 12 ft by 12 ft private office with 8 ft high walls - ANS: 13.6 cfm b) department store with 20,000 ft^2 of floor area - ANS: 4,650 cfm
Answer ONLY items 5-8. Room dimensions are: LxWxH = 8.50 m, 5.0 m, 3m. Originally, the room had linoleum flooring with an absorption coefficient of 0.03. Two opposite walls were cladded with unglazed bricks with an absorption coefficient of 0.02, the one having the entrance gypsum door (2.1 m X 0.80 m) with 0.05 abs.co.; the other two were just bare concrete with sliding glass window openings of 1.80m x 1.20 m each; the bare concrete with an abs.co. Of 0.31 and the window glass with 0.18, the ceiling, too , had bare concrete as its finish at 500 Hz. The client would like to renovate the space into an acoustical studio room and would like to change the ceiling and the flooring. The ceiling will have a vinyl faced fiberglass panel with an abs.co. of 0.71, and the floor will have mineral fiber tiles with an abs.co. Of 0.66, all at 500 Hz.
A room 3.6m x 5m x 8m fully replaces inside air after 3 hours. If the temperature from the outside is 80 F and temperature inside is 60F. Determine the ventilation heat load in Watts. subject Engineering utilities 2
9. A computer room located on the second floor of a five-storey office building is 10m X 7m. The exterior wall is 3.5m high and 10m long; it is a metal curtain wall (steel-backed with 10mm of insulating board), 75mm of glass fiber insulation, and 16mm of gypsum board The single-glazed window (U=5.9 W/m2-K) make-up 30% of the exterior wall. Three computer sets at 500 Watts each and 500 Watts of total lighting power in the room operate 24 hours per day. The indoor temperature is 20°C. Determine the following: a. The heat load, in Kilowatts, if the outdoor conditions is 32°C DB and 23°C WB. b. What would be the load, in Kilowatts, if the windows were double-glazed (U=3.5 W/m2•K)?
A rectangular lot was measured using a 50-m steel tape at 30 oC. If the recorded length and width of the lot are 197.56m and 105.63m respectively. Determine the Error in the area, if the coefficient of thermal expansion is 0.0000116/ oC and standard temperature of the tape is 25 oC. detailed solution pls thank you