Building wall heat flux calculations

Conference · Mon Jun 01 00:00:00 EDT 1987 · ASHRAE Trans.; (United States)

OSTI ID:6367243

Park, J E; Kirkpatrick, J R; Tunstall, J N; Childs, K W

Calculations of the heat transfer through the standard stud wall structure of a residential building are described. The wall cavity contains no insulation. Four of the five test cases represent progressively more complicated approximations to the heat transfer through and within a hollow wall structure. The fifth adds the model components necessary to severely inhibit the radiative energy transport across the empty cavity. Flow within the wall cavity is calculated from the Navier-Stokes equations and the energy conservation equation for an ideal gas using the Implicit Compressible Eulerian (ICE) algorithm. The fluid flow calculation is coupled to the radiation-conduction model for the solid portions of the system. Conduction through sill plates is about 4% of the total heat transferred through a composite wall. All of the other model elements (conduction through wall board, sheathing, and siding; convection from siding and wallboard to ambients; and radiation across the wall cavity) are required to accurately predict the heat transfer through a wall. Addition of a foil liner on one inner surface of the wall cavity reduces the total heat transferred by almost 50%.

• Research Organization: Martin Marietta Energy Systems, Inc., ORGDP, Oak Ridge, TN (US)
• OSTI ID: 6367243
• Report Number(s): CONF-870620-
• Journal Information: ASHRAE Trans.; (United States), Vol. 93:2; Conference: Annual meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Nashville, TN, USA, 28 Jun 1987; Other Information: Technical Paper 3061
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
WALLS
HEAT FLUX
ALGORITHMS
ENERGY CONSERVATION
FLOW MODELS
FLUID FLOW
HEAT TRANSFER
NAVIER-STOKES EQUATIONS
RESIDENTIAL BUILDINGS
BUILDINGS
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
PARTIAL DIFFERENTIAL EQUATIONS
320107* - Energy Conservation
Consumption
& Utilization- Building Systems- (1987-)