ASHRAE-90.1-2022- - Page 363
Extracted Content
Table J-3 Chiller Performance Curves References
| Chiller Condenser Type | Output Variable a | Curve Type b | X c | Y c | Minimum/ Maximum Value for X (I-P °F) | Minimum/ Maximum Value for Y (I-P °F) | Rated Values for X/Y (I-P °F) |
|---|---|---|---|---|---|---|---|
| Air | EIR-f-T | T1 | CHWT | OAT | 39/60 | 55/126 | 44/95 |
| Air | CAP-f-T | T1 | CHWT | OAT | 39/60 | 55/126 | 44/95 |
| Air | EIR-f-PLR | T3 | PLR | 0/1 | 1 | ||
| Water Water | EIR-f-T CAP-f-T | T1 T1 | CHWT CHWT | ECT ECT | 39/60 39/60 | 55/104 55/104 | 44/85 44/85 |
| Water | EIR-f-PLR | T2 | PLR | 0/1 | 1 |
a. EIR-f-T is the energy input ratio modifier as a function of temperatures; CAP-f-T is the capacity modifier as a function of temperatures; and EIR-f-PLR
is the energy input ratio modifier as a function of the chiller’s part load ratio. b. T1: Output = Coeff1 + Coeff2 × X + Coeff3 × X [2] + Coeff4 × Y + Coeff5 × Y [2] + Coeff6 × X × Y
T2 : Output = Coeff1 + Coeff2 × X + Coeff3 × X [2]
T3: Output = Coeff1 + Coeff2 × X + Coeff3 × X [2] + Coeff4 × X [3]
c. CHWT : chilled-water temperature
OAT: outdoor-air dry-bulb temperature ECT: entering condenser temperature PLR: part-load ratio = load at a given simulation time step/available capacity at given simulation time step
Table J-4 Chiller Performance Curves for Section 12 (Simulation Input Required in I-P units)
| Set | Description | Output Variable | Coeff 1 | Coeff 2 | Coeff 3 | Coeff 4 | Coeff 5 | Coeff 6 |
|---|---|---|---|---|---|---|---|---|
| A | Air-cooled <150 tons, 10.100 FL, 13.700 IPLV.IP Path A | EIR-f-T | 1.777758 | –0.038258 | 0.000431 | –0.005368 | 0.000118 | –0.000115 |
| A | Air-cooled <150 tons, 10.100 FL, 13.700 IPLV.IP Path A | CAP-f-T | –1.347697 | 0.070674 | –0.000566 | 0.016793 | –0.000104 | –0.000076 |
| A | Air-cooled <150 tons, 10.100 FL, 13.700 IPLV.IP Path A | EIR-f-PLR | 0.087789 | 0.185696 | 1.561411 | –0.832304 | ||
| B | Air-cooled ≥150 tons, 10.100 FL, 14.00 IPLV.IP Path A | EIR-f-T | 1.872341 | –0.041886 | 0.000442 | –0.006710 | 0.000123 | –0.000086 |
| B | Air-cooled ≥150 tons, 10.100 FL, 14.00 IPLV.IP Path A | CAP-f-T | –1.153535 | 0.075066 | –0.000622 | 0.009777 | –0.000071 | –0.000057 |
| B | Air-cooled ≥150 tons, 10.100 FL, 14.00 IPLV.IP Path A | EIR-f-PLR | 0.118081 | 0.107477 | 1.570838 | –0.794051 | ||
| C | Liquid-cooled positive displacement <75 tons 0.750 FL, 0.600 IPLV.IP Path A | EIR-f-T | 2.001725 | –0.044957 | 0.000484 | –0.008296 | 0.000168 | –0.000125 |
| C | Liquid-cooled positive displacement <75 tons 0.750 FL, 0.600 IPLV.IP Path A | CAP-f-T | –0.907598 | 0.073300 | –0.000653 | 0.003700 | –0.000054 | 0.000006 |
| C | Liquid-cooled positive displacement <75 tons 0.750 FL, 0.600 IPLV.IP Path A | EIR-f-PLR | 0.243730 | 0.165972 | 0.586099 | |||
| D | Liquid-cooled positive displacement ≥75 and <150 tons 0.720 FL, 0.560_IPLV_.IP Path A | EIR-f-T | 1.679306 | –0.041960 | 0.000456 | –0.002081 | 0.000128 | –0.000125 |
| D | Liquid-cooled positive displacement ≥75 and <150 tons 0.720 FL, 0.560_IPLV_.IP Path A | CAP-f-T | –0.857791 | 0.074596 | –0.000670 | 0.001523 | –0.000042 | 0.000012 |
| D | Liquid-cooled positive displacement ≥75 and <150 tons 0.720 FL, 0.560_IPLV_.IP Path A | EIR-f-PLR | 0.208982 | 0.224001 | 0.561479 | |||
| E | Liquid-cooled positive displacement ≥150 and <300 tons 0.660 FL, 0.540_IPLV_.IP Path A | EIR-f-T | 1.136125 | –0.034608 | 0.000401 | 0.008006 | 0.000058 | –0.000131 |
| E | Liquid-cooled positive displacement ≥150 and <300 tons 0.660 FL, 0.540_IPLV_.IP Path A | CAP-f-T | –0.424942 | 0.047087 | –0.000458 | 0.006232 | –0.000070 | 0.000058 |
| E | Liquid-cooled positive displacement ≥150 and <300 tons 0.660 FL, 0.540_IPLV_.IP Path A | EIR-f-PLR | 0.246644 | 0.184576 | 0.566463 | |||
| F | Liquid-cooled positive displacement ≥300 and <600 tons 0.610 FL, 0.520_IPLV_.IP Path A | EIR-f-T | 1.161349 | –0.040557 | 0.000431 | 0.013567 | 0.000003 | –0.000103 |
| F | Liquid-cooled positive displacement ≥300 and <600 tons 0.610 FL, 0.520_IPLV_.IP Path A | CAP-f-T | 0.012766 | 0.033086 | –0.000350 | 0.004004 | –0.000061 | 0.000083 |
| F | Liquid-cooled positive displacement ≥300 and <600 tons 0.610 FL, 0.520_IPLV_.IP Path A | EIR-f-PLR | 0.244926 | 0.218890 | 0.532972 | |||
| G | Liquid-cooled positive displacement ≥600 tons 0.560 FL, 0.500 IPLV.IP Path A | EIR-f-T | 0.874461 | –0.041390 | 0.000430 | 0.022262 | –0.000058 | –0.000097 |
| G | Liquid-cooled positive displacement ≥600 tons 0.560 FL, 0.500 IPLV.IP Path A | CAP-f-T | 0.122304 | 0.024081 | –0.000293 | 0.006302 | –0.000081 | 0.000116 |
| G | Liquid-cooled positive displacement ≥600 tons 0.560 FL, 0.500 IPLV.IP Path A | EIR-f-PLR | 0.264371 | 0.263302 | 0.471690 |
ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 361