Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
If you want to model infiltration using the Appendix G, I would suggest looking at the 90.1 Appendix G User Manual. The manual provides the coefficients. Essentially, since I_design is provided at 4.47 m/s, the adjustment factor should be 1 at these conditions. One way of getting there is to have C = 1/4.47 = 0.244 s/m (with A, B, D = 0). This is the value suggested in the User Manual.
I think your approach is fine (since 0.00500478 * 4.47^2 = 1) only if you assume that at non-design conditions (wind speed != 4.47 m/s) that the infiltration flow rate should be modified by the square of the wind speed, but this is not the intent of Appendix G.
| | 2 | No.2 Revision |
If you want to model infiltration using the Appendix G, I would suggest looking at the 90.1 Appendix G User Manual. The manual provides the coefficients. Essentially, since I_design is provided at 4.47 m/s, the adjustment factor should be 1 at these conditions. One way of getting there is to have C = 1/4.47 = 0.244 s/m (with A, B, D = 0). This is the value suggested in the User Manual.
I think your approach is fine (since 0.00500478 * 4.47^2 = 1) only if you assume that at non-design conditions (wind speed != 4.47 m/s) that the infiltration flow rate should be modified by the square of the wind speed, but I don't think that this is not the intent of Appendix G.
| | 3 | No.3 Revision |
If you want to model infiltration using the Appendix G, I would suggest looking at the 90.1 Appendix G User Manual. The manual provides the coefficients. Essentially, since I_design is provided at 4.47 m/s, the adjustment factor should be 1 at these conditions. One way of getting there is to have C = 1/4.47 = 0.244 s/m (with A, B, D = 0). This is the value suggested in the User Manual.
I think your approach is fine (since 0.00500478 * 4.47^2 = 1) only if you assume that at non-design conditions (wind speed != 4.47 m/s) that the infiltration flow rate should be modified by the square of the wind speed, but I don't think that this is the intent of Appendix G.
| | 4 | No.4 Revision |
If you want to model infiltration using Appendix G, I would suggest looking at the 90.1 Appendix G User Manual. The manual provides the coefficients. Essentially, since I_design is provided at 4.47 m/s, the adjustment factor should be 1 at these conditions. One way of getting there is to have C = 1/4.47 = 0.244 s/m (with A, B, D = 0). This is the value suggested in the User Manual.
I think your approach is fine (since 0.00500478 * 4.47^2 = 1) only if you assume that at non-design conditions (wind speed != 4.47 m/s) that the infiltration flow rate should be modified by the square of the wind speed, but I don't think that this is the intent of Appendix G.speed.
