4-1 The exterior wall of a single-story office building near Chicago is 3 m high and...
For a 400 m-area concrete middle floor office space of a muti-story office building located in Barcelona, Spain; that is operating from 8:00 a.m. till 4:00 p.m. with 100 m west facing glass and 40 occupants. The space has carpeted floor, one exposed wall, interior gypsum partitions, and drop ceiling find the following @ 3:00 p.m.: a). Cooling load due to Glass (conduction, solar, total). b). Cooling load due to Occupants (sensible and latent). c). Cooling load due to Lighting...
A wall in a building has a width of 15 m and a height of 3 m. It is made of several layers — a layer of motionless air with an R value of 0.12 K m2/ W, a 12.4 mm thick layer of gypsum board with a thermal conductivity of 0.17 W/m K, a layer of brick with an R value of 1.7 K m2/ W, and another layer of motionless air with an R value of 0.12 K...
Problem 1: A furnace has a 4 m high composite wall constructed of 4 cm thick fireclay brick on the inside, and 10 cm of oval-core concrete block with sand in the cores as the outer surface. The inside surface of the wall is at 400°C. The outer surface is exposed to quiescent air at 23°C (i.e., natural convection is occurring). What is the steady-state temperature of the outer surface of the wall? Use a film temperature of 400K to...
Consider a house that has a 10-m x 20-m base and a 4-m-high wall. All four walls of the house have an R-value of 2.31m2°C/W. The two 10-m x 4-m walls have no windows. The third wall has five windows made of 0.5-cm-thick glass (k = 0.78 W/m-K), 1.2m x 1.8min size. The fourth wall has the same size and number of windows, but they are double paned with a 1.5-cm-thick stagnant air space (k = 0.026 W/m-K) enclosed between...
Consider an ocean-facing room in a high-rise building (L/W of 1). The ocean-facing wall (with window) is 10m by 4 m, contains two windows (3m by 1m, each). Assume the room is located 30 m above the neutral pressure level and the inside air temperature is maintained at 24°C with RH of 50%. Outside air is of 35°C with RH of 60%. Assume the convective heat transfer coefficients on inner side and outer side of the wall and window are 0.5 and...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
summatize the following info and break them into differeng key points. write them in yojr own words apartus 6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...