ASHRAE-90.1-2022- - Page 380
Extracted Content
L3. SIMULATION PROGRAM
The simulation program shall have the following capabilities:
Table L2.2.3 Proposed Building HVAC System Parameters
| Category | Parameter | Fixed or User Defined | Required | Applicable Systems a |
|---|---|---|---|---|
| HVAC System Type | System type | User defined | Selected from Table L.1.1.1 | All |
| System Sizing | Design-day information | Fixed | 99.6% heating design and 1% dry-bulb and 1% wet-bulb cooling design | All |
| System Sizing | Zone coil capacity | Fixed | Sizing factors used are 1.25 for heating_equipment_ and 1.15 for cooling_equipment._ | All |
| System Sizing | Supply airflow | Fixed | Based on the greater of a supply-air-to-room-air temperature_set point_difference of 20°F or required_OA_ ventilation | |
| Outdoor Ventilation Air and Filtration | Portion of supply air with proposed filter ≥MERV 13 | User defined | Percentage of supply airflow subject to higher filtration (adjusts reference fan power higher; prorated) | All |
| Outdoor Ventilation Air and Filtration | Outdoor_ventilation_ supply airflow rate adjustments | Fixed | Basis is 1.0 zone air distribution effectiveness | All |
| Outdoor Ventilation Air and Filtration | Outdoor_ventilation_ supply airflow rate | Fixed | As specified in ASHRAE/IES Standard 90.1 Normative Appendix C, adjusted for proposed_DCV_ control (See “Demand Control Ventilation” category below.) | All |
| System Operation | Space temperature_set points_ | Fixed | As specified in ASHRAE/IES Standard 90.1 Normative Appendix C, except for hotel/motel, which shall be 70°F heating 72°F cooling | All |
| System Operation | Fan operation—occupied (where DOAS meets ventilation requirements) | User defined | Fan either runs continuously during occupied hours or is cycled to meet thermal load. | All (continuous) 1–11 (cycles) |
| System Operation | Fan operation—occupied (where heating and cooling units provide_ventilation_—no DOAS) | Fixed | Fan runs continuously during occupied hours;VAV or multispeed fans reduce airflow related to thermal load. | 1–11 |
| System Operation | Fan operation—night cycle | Fixed | Fan cyclesON to meet_setback_ temperatures. | 1–11 |
| Packaged Equipment Efficiency | DX cooling_efficiency_ | User defined | Cooling_COP_ without fan_energy_ calculated in accordance with Section L4.2.3(d) | 1, 2, 3, 4, 5, 7, 8, 9, 11, 12 |
| Packaged Equipment Efficiency | DX coil number of stages | User defined | Single stage or multistage | 3, 4, 9, 10, 11, 12 |
| Packaged Equipment Efficiency | Heat-pump_efficiency_ | User defined | Heating_COP_ without fan_energy_ calculated in accordance with Section L4.2.3(d) | 2, 4, 5, 7, 8, 12 |
| Packaged Equipment Efficiency | Furnace_efficiency_ | User defined | Furnace thermal_efficiency_ | 1, 3, 9, 12 |
| Heat-Pump Supplemental Heat | Heat source | User defined | Electric resistance or gas furnace | 2, 4, 7, 8, 12 |
| Heat-Pump Supplemental Heat | Control | Fixed | Electric heat locked out above 40°F OAT. Runs as needed in conjunction with compressor between 40°F and 0°F. Gas heat operates in place of the heat pump when the heat pump cannot meet load. | 2, 4, 7, 8, 12 |
a. Applicable systems from Table L.1.1.1 Informative Note: See Section 3.3 for a full list of terms used in this table.