Nemo Cluster Air Conditioner Testing
- Basline Measurements
- Heat Testing Measurements
- Dell laptop with CentOS 5.3
- Pico TH-03 Temperature Data Logger
- KVA - 84
- KW - 76
- KWH - 1520051
- PF - 0.95
- KVA - 80
- KW - 76
- KWH - 1576268
- PF - 0.94
- Output
- KVA - 173
- KWH - 167
- PF - 0.96
- Input
- KVA - 158
- KW - 157
- PW - 0.98
- Blue line - Floor temperature
- Red line - Top of Air Conditioner
- Yellow line - Ceiling Temperature
- 4/29 Afternoon: 4.5 C
- 4/29 Evening: 3.5 C
- 4/29 Night: 2.0 C
- 4/30 Morning: 5.0 C
- 4/30 Afternoon: 10.0 C
- 5/1 Afternoon: 10.0 C
- 5/1 Evening: 10.0 C
- 5/1 Night: 13.0 C
- 5/2 Morning: 6.0 C
- 5/2 Afternoon: 16.5 C
- 5/4 Afternoon: 16.5 C
- 5/4 Evening: 13.0 C
- 5/5 Morning: 11.5 C
- 5/5 Afternoon: 13.0 C
- 5/5 Afternoon: 15.0 C
- 5/5 Evening: 16.5 C
- 5/5 Night: 12.5 C
- 5/6 Morning: 13.5 C
- 5/6 Afternoon: 14.5 C
- Dell Laptop
- Pico TH-03 Temperature Data Logger
- 750W / 1500W Electric space heaters
- Test 1
- Test 2
- Test 3
- Test 4
- Heater Power Calculation
- 32 heaters
- 16 circuits were used on PDU2
- Each circuit had 2 heaters running. One on 1500W and one at 750W.
- Test ran for 3 hours. One hour before heaters were turned on, one hour with the heat on, and one hour after the heaters were turned off.
- Sensors were placed: Above AC1, above the heaters, and in the hot isle of the current racks.
- 56 heaters were used
- 28 circuits were used on PDU2
- Each circuit had 2 heaters running. One on 1500W and one at 750W.
- Test ran for 3 hours. One hour before heaters were turned on, one hour with the heat on, and one hour after the heaters were turned off.
- Sensors were placed: Above AC1, above the heaters, and in the hot isle of the current racks.
- 55 heaters
- 55 circuits were used on PDU2
- Each circuit had 1 heater running at 1500W.
- Test ran for 7 hours. Heat OFF from 9:00am - 9:30am. Heat ON from 9:30am - 11:30am. Heat OFF from 11:30am - 12:30pm. Heat ON from 12:30pm - 3:30pm.
- Sensors were placed: Above AC1, above the heaters, and near the thermostat in the center of the room.
- 55 heaters
- 55 circuits were used on PDU2
- Each circuit had 1 heater running at 1500W.
- Test ran for a total of 2.5 days. The heaters were turned on for a total of 17.5hrs. This time is excluding two 1hr periods where the heaters were turned off. The baseline prior to the test lasted for about 36 hours.
- Sensors were placed: Above AC1, above the heaters, and near the thermostat in the center of the room.
Nemo Cluster Air Conditioner Testing (Baseline Measurements)
Equipment
To perform the Air Conditioning tests, the following equipment was used:
Configuration
The testing consisted of moving the TH-03 temperature sensors near each air conditioner in the room. Each sensor was placed in a different place. The first sensor was placed under the floor in front of the air conditioner. The second sensor was placed directly on top of the air conditioner near the filters. The third sensor was placed further into the center of the room near the ceiling.
Each air conditioner was tested for a full 24 hours. Data was taken from the temperature sensors simultaneously every 30 seconds over the time frame.
Air conditioner numbers are displayed in blue on the following map of the Nemo cluster.
PDU and UPS data during the test is:
PDU 1:
PDU 2:
UPS:
AC Temperature Setpoints: AC 1: 71 C, AC 2-4: 70 C
Results and Graphs
The graphs below show the temperature changes over the 24 hour test period for each of the four air conditioning units in the Nemo cluster.
These are all baseline measurements. Meaning, the temperatures are taken with the current room configuration.
For all tests:
Data for air conditioner 1:
Note - Outside weather (Approx. Temp in C)
As the graph shows, air conditioner 1's floor temperature spikes up within the 24 hour test period. This is because the air conditioner is turning off, then turning back on when the temperature reaches the 70 degree trigger point. The room temperatures both remain fairly constant over the 24 hours.
Data for air conditioner 2:
Note - Outside weather (Approx. Temp in C)
As this graph shows, air conditioner 2's temperature stayed relatively constant throughout the 24 hour period. There were minor variations during the night hours, but nothing severe.
Data for air conditioner 3:
Note - Outside weather (Approx. Temp in C)
This is a graph of only the floor temperature of air conditioner 3.. The temperature changed between its maximum of about 22 C and its minimum of about 9-10 C throughout the night.
The graph that is zoomed in on a 2 hour time frame where the floor temperature changes.
The room temperatures from air conditioner 3 stay fairly steady around 19-21 C during the 24 hour test. Even with the changes in the floor temperature changing during the time, the room temperature stayed relatively constant.
Data for air conditioner 4:
Note - Outside weather (Approx. Temp in C)
As this graph shows, all of the temperatures near air conditioner 4 stayed near the same temperature. The floor should be cooler than the room temperatures which was shown in the graphs of the other air conditioners. This area seems to be running a bit warmer than the areas near the other air conditioners. Even though it is a higher temperature, the difference between the air conditioners is only a few degrees C.
After zooming into a two hour time period for air conditioner 4's test where the floor temperature is changing, it is shown that the floor temperature is changing steadily. In other parts of the test period, the floor temperature stays near its maximum temperature of about 23 C.
Conclusion
After all of the data is graphed, it shows that the average overall room temperature is about 23 C. Air conditioners 1 and 2 keep the temperatures steady and the temperatures under the floor cool throughout the testing period. Air conditioners 3 and 4 don't seem to be able to keep the floor temperature in the area as cool as the others, but the room temperatures still seem to be within a good range.
Heat Testing
Equipment
To perform these tests, the following equipment was used:
Configuration
Each test ran with small differences between them. The variables that were changed were: location of the sensors, number of heaters, and the length of the testing period. Each test will be explained in the Results and Graphs section.
Results and Graphs
Test 1
Information:
This test was conducted with the following parameters.
Test 2
Information:
This test was conducted with the following parameters.
Test 3
Information:
This test was conducted with the following parameters.
Test 4
Information:
This test was conducted with the following parameters.
Actual Power Consumption Calculations
Amps measuered using high setting:
11.91, 11.47, 11.34, 11.50, 11.36, 11.43, 11.47, 11.34, 11.41, 11.39 A
Average Amps on high setting: 11.46A
Watt Calculation: A * V = W; 11.46A * 110V = 1254W
Amps measured using low setting:
5.84, 5.84, 5.86, 5.89, 5.88, 5.83, 5.87, 5.84, 5.79, 5.88A
Average Amps on low setting: 5.86A
Watt Calculation: A * V = W; 5.86A * 644.6W
Contact info: Kevin Soden (kgsoden@gravity.phys.uwm.edu)