DOE-2 Reference Manual Version 2.1 - DOE2.com

Rules:Examples:1. Either LAYERS or U-VALUE should be entered, but entering both, orneither, wi 11 generate an error message.2. If LAYERS is specified, a transient heat transfer calculation isperformed. It is recommended for massive constructions.3. If U-VALUE is specified, a steady-state heat transfer calculationis performed. It is recommended for lightweight constructions.4. The U-VALUE is used to calculate heat transfer through interiorwalls, floors, underground walls, and underground floors. Ifdelayed descriptions are input for these surfaces (for CustomWeighting Factors), LDL will calculated the U-value.1. An exterior wall is constructed of heavyweight concrete block withstucco exterior.HEAVY ~ CONSTRUCTIONLAYERS ~ CBLOCKABSORPTANCE ~ 0.65ROUGHNESS ~ 1 ..2. An interior wall is light wood framing with drywall finish.LIGHT ~ CONSTRUCTIONU-VALUE ~ 0.3063. An equivalent brick-faced exterior wall is found in theConstructions Library.WALL-l ~ CONSTRUCTIONLAYERS ~ WJOI-3ABSORPTANCE ~ 0.88ROUGHNESS ~ 2II 1.85 (Revised 5/81)