Building Thermal Analysis

Building Thermal Analysis covers the major topics of heat transfer and thermal dynamics in buildings, including steady-state and transient multidimensional conduction, convection, radiation, heating and cooling load calculation, and thermal control. Practical methods for building thermal analysis and design, accompanied by explanatory theory and illustrations, are presented. There are excellent worksheets for PTC Mathcad around Steady-State Heat Conduction, Transient Heat Conduction, Radiation Heat Transfer in Buildings, and more!

If you are doing any type of building thermal analysis, PTC Mathcad has you covered. For example, if you are working with heat conduction in multi-layered walls, there is a worksheet to help with the calculations. Specifically it demonstrates the calculation of the thermal resistance and temperature distribution within a wall assuming one-dimensional steady-state heat transfer. This worksheet also works with the free version of PTC Mathcad, PTC Mathcad Express!

You may be working with transient heat conduction or more specifically, calculating the thermal building analysisfloor temperature at the bottom surface of a concrete slab with the semi-infinite model. The semi infinite slab – radiant heat flux on floor worksheet provides the infrastructure to easily plug in calculations and complete analysis. One note, this worksheet does require the full version of PTC Mathcad Prime 3.0.

Another commonly used worksheet is the Calculation of View Factors in a Rectangular Room with one Window. “Radiant floor heating and cooling systems are becoming increasingly popular, due to their ability to provide better thermal comfort than forced air systems,” according to this Purdue University paper. This worksheet allows one to easily compare calculations without re-writing the formula.

The ones mentioned above have more wide reaching applications, but there are very specific worksheets as well. For example, Detailed Steady-Periodic Zone Model and Heating Load Calculations, considers a detailed model based on the admittance method. It gives an example for a house which consists of a basement and a ground level floor, with a pitched roof. The basement heating load may be determined with the techniques of Section 3.2 (Heat Flow in Basements). Here the ground level zone is considered.

If your work involves any aspect of building thermal analysis, check out the entire list of worksheets here. This is an outstanding resource that can save a great deal of time and ensure accuracy when it comes to making calculations and providing analysis.

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