Retrotec USACE - Manual (Page 386)

J10 ENERGY & PROCESS ASSESSMENT PROTOCOL
J.7 Install Water Source Heat Pumps (WSHPs) to Augment
the Capacity of the Hot Water Boiler and to Reduce the
Cooling Load on the Existing Chiller Systems When Heat
Is Required
A 20-ton WSHP can deliver approximately 320,000 BTUH of heat when it is
loaded up.
In many cases, the chilled water temperatures that are delivered to the
facilities may be too high to adequately cool the facility and may also be too
high to adequately dehumidify the building. In these cases, small WSHPs can
be used to reduce the CHWS temperature entering the building while simul-
taneously dumping the excess heat into a water storage tank for the domestic
water loads.
In cases like these, dry coolers should be installed to act as a heat rejection
source for the WSHP when the domestic water system can no longer accept
any more heat but there is still a need for the cooling system capacity/tempera-
ture to be augmented.
J.8 Develop an HVAC and Control System Design Criteria
for New and Retrofi t Projects
A design standard should be developed with substantial input from the operat-
ing staff and from subject matter experts familiar with dehumidifi cation and
control system design and function in the fi eld.
Once implemented, the savings associated with standardized system de-
signs and installations will result in millions of dollars per year in avoided
energy, maintenance, and biological remediation costs.
A design standard will also lessen the costs to perform system design and
engineering reviews, as standardized designs will be able to be utilized by the
local design engineering fi rms.
This will have the added benefi t of educating these fi rms for work in the
private sector, allowing their clients to reduce the lifecycle costs of their facili-
ties, and helping America reduce energy waste and remain competitive with
other nations.