Page 409 - Mines Facilities Plan

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particularly latent cooling. SBEC investigated the potential to retrofit the CP5
chillers in order to lower the chilled water temperature they can generate.
entrances, the resulting building chilled water supply temperature would
be 47ºF. This temperature is too warm to provide effective sensible and

Appendix 2: Utilities Master Plan

EXISTING CAMPUS COOLING SUMMARY

However, this would result in a significant reduction in chiller plant capacity. Therefore, no changes are anticipated for CP5 as a part of this master plan other than replacing the existing non-operational steam absorption chiller for EXISTING CHILLER PLANT SUMMARY BY Central Campus houses two (2) chilled water plants, Chiller Plant 4 (CP4) and CP4 is a stand-alone plant located just west of the Arthur Lakes Library. This

plant redundancy. NEIGHBORHOOD CENTRAL CAMPUS Chiller Plant 7 (CP7).

return at the building side. Facilities Management’s desire is to fully implement
water to each building that is at least 2 ºF to 3 ºF colder than the desired 45ºF
chilled water system. This typically results in a need to supply campus chilled
the addition of plate heat exchangers at each building entrance, to separate
the campus chilled water systems from each building’s chilled water system
respective buildings. However, several chiller plants are currently producing
generate nominal 42ºF chilled water. All of the chilled water plants, with the
building chilled water temperature. Therefore, the chilled water plants must
exception of CP5, generally produce and deliver chilled water at 42ºF and
temperature is to provide 45ºF chilled water supply and 55ºF chilled water
return at 52ºF producing a 10ºF temperature differential at each plant and
and then provide a 20 percent propylene glycol mixture in each building’s
SBEC understands that the current campus standard for chilled water

a temperature differential of less than 10ºF, effectively reducing the plant’s capacity. Mines is working on control strategies to optimize the operations and Additionally, the chilled water within the plants and buildings typically has 20 percent propylene glycol for freeze protection. Once all buildings have been decoupled, it is anticipated that glycol will be removed from the plant side of Note: CP

restore the plants back to design.

operations and only be on the building side.

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