HVAC Engineering Toolkit modules were validated against the test examples in ASHRAE Handbook Fundamentals 2005 /1/ and ASHRAE Standard Thermal Environmental Conditions for Human Occupancy /2/. The summaries of the testing results are presented in this article.
| Parameter | Test source | Units | Actual | Simulated | Deviation |
|---|---|---|---|---|---|
| Solar irradiance | Single-room example, p.30.32 /1/ | Btu/h/ft2 | 205.4 | 205.4 | 0% |
| Solar-temperature | same | oF | 156 | 156.4 | 0% |
| Lighting cooling load | same | Btu/h | 1122 | 1123 | 0% |
| Wall cooling load | same | Btu/h | 602 | 572 | 5.2% |
| Cooling load of windows without blinds | same | Btu/h | 5636 | 5542 | 1.4% |
| Cooling load of windows with blinds | same | Btu/h | 4310 | 4254 | 1.1% |
| Room heat loss | same | Btu/h | 8495 | 8513 | -0.2% |
| Duct diameter, in. | Test source | Source value | By module (Galvanized steel) | By module (Uncoated carbon steel) |
|---|---|---|---|---|
| ¾ | Friction chart /1/ | 25.0 | 23.9 | 20.8 |
| 1 | same | 7.0 | 7.04 | 6.32 |
| 1 ¼ | same | 1.8 | 1.79 | 1.65 |
| 1 1/2 | same | 0.9 | 0.83 | 0.78 |
| Duct diameter, in. | Test source | Actual | By module (Galvanized steel) | By module (Uncoated carbon steel) |
|---|---|---|---|---|
| 2 | Friction chart /1/ | 19 | 19.06 | 16.27 |
| 2 ½ | same | 7.2 | 7.69 | 6.69 |
| 3 | same | 2.5 | 2.56 | 2.28 |
| 4 | same | 0.52 | 0.65 | 0.6 |
| Parameter | Test source | Units | Actual | Predicted | Deviation |
|---|---|---|---|---|---|
| Atmospheric pressure | Chapter 6 /1/ | In. Me | 29.921 | 29.921 | 0% |
| Dry-bulb temperature | same | oF | 100 | 100 | 0% |
| Wet-bulb temperature | same | oF | 65 | 65 | 0% |
| Humidity ratio | same | lb/lb | 0.0052 | 0.0053 | -2% |
| Enthalpy | same | Btu/hlb | 29.8 | 29.8 | 0% |
| Relative humidity | same | % | 13 | 13 | 0% |
| Specific volume | same | ft3/lb | 14.22 | 14.25 | 0% |
| Dew-point temperature | same | oF | 40 | 40.3 | -1% |
| Parameter | Test source | Units | Test #1 | Test #2 | Test #3 | Test #4 |
|---|---|---|---|---|---|---|
| Metabolic heat production | Appendix D /4/ | met | 1.1 | 1.1 | 1.1 | 1.1 |
| Insulation of clothing | same | clo | 1.0 | 1.0 | 1.0 | 1.0 |
| Indoor air temperature | same | oC | 19.6 | 23.9 | 25.7 | 21.2 |
| Indoor air temperature | same | % | 86.0 | 66.0 | 15.0 | 20.0 |
| Mean radiant temperature | same | oC | 19.6 | 23.9 | 25.7 | 21.2 |
| Air velocity | same | m/s | 0.1 | 0.1 | 0.1 | 0.1 |
| Actual PMV | same | -0.5 | 0.5 | 0.5 | -0.5 | |
| PMV by module | -0.47 | 0.49 | 0.54 | -0.45 | ||
| Actual PPD | same | 10% | 10% | 10% | 10% | |
| PPD by module | 10% | 10% | 11% | 9% | ||
| Metabolic heat production | Appendix D /4/ | met | 1.1 | 1.1 | 1.1 | 1.1 |
| Insulation of clothing | same | clo | 0.5 | 0.5 | 0.5 | 0.5 |
| Indoor air temperature | same | oC | 23.6 | 26.8 | 27.9 | 24.7 |
| Indoor air temperature | same | % | 67.0 | 56.0 | 13.0 | 16.0 |
| Mean radiant temperature | same | oC | 23.6 | 26.8 | 27.9 | 24.7 |
| Air velocity | same | m/s | 0.1 | 0.1 | 0.1 | 0.1 |
| Actual PMV | same | -0.5 | 0.5 | 0.5 | -0.5 | |
| PMV by module | -0.46 | 0.55 | 0.52 | -0.46 | ||
| Actual PPD | same | 10% | 10% | 10% | 10% | |
| PPD by module | 9% | 11% | 11% | 9% |
| Duct diameter, in. | Test source | Units | Actual | By module | Deviation |
|---|---|---|---|---|---|
| 26 | Chapter 35 /1/ | Inch w.c./100ft | 0.08 | 0.08 | 0% |
| 22 | same | same | 0.195 | 0.190 | 3% |
| 18 | same | same | 0.50 | 0.52 | -4% |
| 14 | same | same | 1.99 | 1.85 | 7% |