Exhibit U - SCSU Chilled Water Study Report - St. Cloud State ...
Exhibit U - SCSU Chilled Water Study Report - St. Cloud State ...
Exhibit U - SCSU Chilled Water Study Report - St. Cloud State ...
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19. <strong>St</strong>udent Recreation Center<br />
GRAPH 4<br />
CHW Temperature (°F)<br />
70<br />
65<br />
60<br />
55<br />
50<br />
45<br />
<strong>St</strong>udent Rec Center<br />
September 1, 2011<br />
CHW Supply and Return Temperatures<br />
Supply Temp, °F<br />
Return Temp, °F<br />
40<br />
7:12 PM<br />
12:00 AM<br />
4:48 AM<br />
9:36 AM<br />
2:24 PM<br />
7:12 PM<br />
12:00 AM<br />
Cooling System Performance<br />
Graphs 2, 3, and 4 above indicate that the building load commences around 7:00 AM and maintains the<br />
desired setpoint until 10:00 PM every day of the week.<br />
Building Impact on <strong>Chilled</strong> <strong>Water</strong> System<br />
The two-way valves on the AHUs are performing properly and are not having a negative impact on the chilled<br />
water distribution system.<br />
Recommendations<br />
• Investigate and resolve issues with scheduling and system performance.<br />
• Properly tune individual AHU control valves.<br />
• Install BTU chilled water meter in the ground floor mechanical room.<br />
• Balance water flow to AHUs.<br />
• Document new performance data.<br />
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