System Description
Water-cooled CRAC system with shared condenser loop.
Data Center Air --> CRAC 7 --+ +-- DryCooler North
|-- condenser water --| --> Outdoor Air
Data Center Air --> CRAC 8 --+ loop +-- DryCooler South
CRACs cool indoor air, reject heat into shared water loop.
Dry coolers reject that heat outdoors (coils to be coated).
System EER = total cooling capacity / total power (all 4 components).
IPMVP Option B Readiness — System Summary
Coating Readiness
Need More Data
EER Coverage iOf all compressor-on readings, how many have valid EER values. High-OA units naturally have lower coverage because when supply air enthalpy ≤ outdoor enthalpy at moderate OAT, EER is physically undefined (no net cooling). This is expected physics, not a data problem.
147,633/227,764 (64.8%)
Low EER coverage is typical during shoulder season — compressors cycle frequently at moderate OAT, producing short runs without steady-state EER. Coverage will improve as sustained cooling demand increases.
Max OAT Observed iHighest outdoor air temperature recorded during compressor-on operation. Coating baseline needs 90°F+ readings to capture peak-load performance.
77.0°F
Weather Feed iStatus of Open-Meteo weather data for this site. Weather data is needed for EER pairing and OAT bin regression.
0h ago
• Baseline at 76% — need more collection time before coating.
OAT Bin Performance
| Bin (°F) | Readings | Avg kW | Avg EER | |
|---|---|---|---|---|
| 60–65° | 16,255 | 12.3 | 11.6 | |
| 65–70° | 18,045 | 12.0 | 9.6 | |
| 70–75° | 56,218 | 11.4 | 10.1 | |
| 75–80° | 5,487 | 12.4 | 10.9 | |
| 80–85° | 0 | — | — | |
| 85–90° | 0 | — | — | |
| 90–95° | 0 | — | — | |
| 95–100° | 0 | — | — |
Wowrack Data Center (5 units)
76% Partial
OAT Bin Coverage iNeed ≥5 of the 8 five-degree bins (60–100°F) with compressor-on readings. Filled: 60–65°F, 65–70°F, 70–75°F, 75–80°F. Empty: 80–85°F, 85–90°F, 90–95°F, 95–100°F.
4/5 bins
Need 1 more bin(s). Missing: 80–85°F, 85–90°F, 90–95°F.
Min Readings/Bin iStatistical power per temperature bin. The thinnest filled bin must have at least 10 readings for a defensible average.
5487/10 readings
Total Readings iTotal compressor-on readings with valid OAT. Larger datasets produce tighter regression confidence intervals. Target: 500+.
227764/500 readings
Monitoring Window iCalendar days from first to last compressor-on reading. At least 14 days captures weekday/weekend cycles and weather variation.
21.6/14d
kW-vs-OAT R² iHow strongly outdoor temperature predicts electrical power draw (linear regression). R² ≥ 0.75 means OAT explains at least 75% of kW variance.
0.02/0.75
Weak OAT-kW correlation. Unit may be oversized or have variable internal loads.
Diagnostics
Data Completeness iOf all the readings the sensor should have sent (based on its reporting interval), how many actually arrived? Small gaps from WiFi hiccups are normal. Only a concern if large chunks of time are missing.
0.1%
Significant data gaps (99.9% missing). Verify sensor is online and gateway has stable connection.
CV-RMSE iCoefficient of Variation of RMSE — measures how well the kW-vs-OAT regression fits the data. Lower is better: <15% excellent, <25% good, 25%+ may need more data or a non-linear model.
20.1%
Sensor Channels iAll mapped sensor channels should have at least one reading. Missing channels may indicate dead sensors or configuration errors.
10/10
Regression Model iBaseline regression equation: kW = slope × OAT + intercept. Required by IPMVP for 3rd-party verification of the baseline model.
kW = -0.0310 × OAT + 13.16
EER Model iEER vs OAT regression. A positive slope is expected physics for high-OA units: higher outdoor temp → higher cooling load → more efficient compressor operation (closer to design conditions). Negative slope is typical for recirculation-dominant units.
EER = -0.1634 × OAT + 25.68 (R²=0.104)
NMBE iNormalized Mean Bias Error — measures systematic over/under-prediction. IPMVP threshold: <±5% excellent, <±10% acceptable.
0.0%
Durbin-Watson iTests whether regression residuals are independent over time. DW ≈ 2.0 = good. DW < 1.5 = positive autocorrelation (model misses a trend). DW > 2.5 = negative autocorrelation.
0.19
Sensor Status
▼
| Sensor ID | Unit | Measures | Source | Readings | Interval | Data From | Last Seen | Status |
|---|---|---|---|---|---|---|---|---|
| 1386146 | CRAC 7 | amperage | monnit | 41,821 | ~60s | 2026-04-11 | 2026-05-06 06:28:17 | Healthy |
| 1386370 | CRAC 7 | cond_water_return | monnit | 42,435 | ~60s | 2026-04-11 | 2026-05-06 06:28:12 | Healthy |
| 1386356 | CRAC 7 | cond_water_supply | monnit | 41,822 | ~60s | 2026-04-11 | 2026-05-06 06:28:47 | Healthy |
| 1351069 | CRAC 7 | evap_inlet_rh | monnit | 36,838 | ~60s | 2026-04-11 | 2026-05-06 06:28:50 | Healthy |
| 1351099 | CRAC 7 | evap_outlet_rh | monnit | 36,674 | ~60s | 2026-04-11 | 2026-05-06 06:27:59 | Healthy |
| 1386147 | CRAC 8 | amperage | monnit | 41,739 | ~60s | 2026-04-11 | 2026-05-06 06:27:57 | Healthy |
| 1351118 | CRAC 8 | evap_inlet_rh | monnit | 41,445 | ~60s | 2026-04-11 | 2026-05-06 06:28:14 | Healthy |
| 1351076 | CRAC 8 | evap_outlet_rh | monnit | 36,659 | ~60s | 2026-04-11 | 2026-05-06 06:28:10 | Healthy |
| 1359855 | DryCooler North | amperage | monnit | 58,737 | ~60s | 2026-04-11 | 2026-05-06 06:28:26 | Healthy |
| 1359866 | DryCooler South | amperage | monnit | 41,745 | ~60s | 2026-04-11 | 2026-05-06 06:28:06 | Healthy |
| Site Total | 419,915 | 2026-04-11 | 2026-05-06 06:28:50 | |||||
Drop iMonnit gateway screenshot to import sensors
or click to browse — AI extracts sensor IDs, names & types
or click to browse — AI extracts sensor IDs, names & types
Per-Unit Summary
▼
| Unit | Tons | Install | Age | Avg EER | Avg kW | Est. EFLH | Latent % | Subcool ΔT | Readiness | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| Wowrack Cooling System SYSTEM | 60T | — | — | — | System | |||||
|
CRAC 7
Liebert
|
30T | — | — | — | — | — | — | — | Collecting | |
|
CRAC 8
Liebert
|
30T | — | — | — | — | — | — | — | Collecting | |
|
DryCooler North
Liebert DNT940A
|
30T | 2007 | — | — | — | — | — | — | Collecting | |
|
DryCooler South
Liebert DNT940A
|
30T | 2008 | — | — | — | — | — | — | Collecting | |
Live Readings
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EER vs Outdoor Temp
% Load vs Outdoor Temp
EER (BTU/W)
Amperage
kW
Evap Coil Temps (Inlet / Outlet)
Enthalpy Delta
Cooling Breakdown (Sensible + Latent)
Latent Cooling Fraction (%)
Discharge → Outlet Delta
Condenser Temps (Discharge / Outlet)