Calculate the whole-house design cooling load (both sensible and latent loads), using the residential load factor method. 23.0 +2.4- - 6.1 - 7.3 1.2x1.8 |0.9×0.9| 1.8x2.4 0.9x2.1 MASTER BEDROOM BATH LIVING ROOM GARAGE BATH 0.9x2.1 BEDROOM 1 KITCHEN AND DINETTE BEDROOM UTILITY 1,2x1.2 1.2x1,2 1.2x1,2 0.9x0.9 0.9x2.1 CLOSET STORAGE AND SHOP
Calculate the whole-house design cooling load (both sensible and latent loads), using the residential load factor method. 23.0 +2.4- - 6.1 - 7.3 1.2x1.8 |0.9×0.9| 1.8x2.4 0.9x2.1 MASTER BEDROOM BATH LIVING ROOM GARAGE BATH 0.9x2.1 BEDROOM 1 KITCHEN AND DINETTE BEDROOM UTILITY 1,2x1.2 1.2x1,2 1.2x1,2 0.9x0.9 0.9x2.1 CLOSET STORAGE AND SHOP
Residential Construction Academy: House Wiring (MindTap Course List)
4th Edition
ISBN:9781285852225
Author:Gregory W Fletcher
Publisher:Gregory W Fletcher
Chapter14: Branch-circuit Installation
Section: Chapter Questions
Problem 11RQ
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100%
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Project Description
A single-family detached house with floor plan shown in Figure 1 is located in Charlotte, NC (Latitude: 35° N). Ceiling height is 2.4 m. The garage is unconditioned while all other spaces are conditioned. The house has the following construction characteristics:
Roof: Attic roof with asphalt shingles
Ceiling: Flat wood-frame ceiling with blow-in fiberglass insulation, U-factor= 0.18 W/m2-°C
Doors: Wood, solid core doors, U-factor = 0.51 W/m2-°C
Floor: Slab-on-grade floor with heavy carpet over rubber pad (Thermal resistance of floor covering Rcvr=0.21 m2*°C/W); R-0.9 edge insulation to 1 m below grade; Fp= 0.85 W/m-°C;
Windows:
All windows are clear double-pane glass in vinyl frames
The window in the living room is a fixed picture window. All other windows are vertical sliding windows operable with insect screens
White roller interior shades, half closed
Overhang: eave overhang along all four sides of the house; overhang depth = 0.6 m; eave edge at the same height as top of glazing
The wall between garage and other spaces has the same construction as exterior walls.
The design conditions for this house:
Indoor temperature: 20°C for heating; 24°C for cooling
Indoor relative humidity: 50% for cooling; no humidification
Wind speed: 24 km/hr for heating; 12 km/hr for cooling
Infiltration: 0.3 ACH for heating; 0.15 ACH for cooling
Ventilation: no mechanical ventilation
Charlotte weather information
99% design dry-bulb temperature: -3.9°C
1% design dry-bulb temperature: 32.8°C
Mean coincident wet-bulb temperature corresponding to 1% design dry-bulb temperature: 23.2°C
Mean daily temperature range: 9.9°C
A split HVAC system is used for this house. Duct runs in the attic. Assume duct distribution loss factor is 0.13 for heating and 0.27 for cooling.
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