ASHRAE Journal - June 2020 - 38
2020
ASHRAE TECHNOLOGY AWARD CASE STUDIES
DRY BULB
TEMPERATURE
RELATIVE
HUMIDITY
TEMP & HUMIDITY
CLASSIFICATION
AA+
70°F ±2°F
50% ±3%
Most Critical
AA
70°F ±4°F
50% ±5%
Critical
A
70°F ±4°F
50% ±10%
Critical w/
Seasonal Offsets
B
70°F ±9°F
50% ±10%
Collections
Buffer Zone
B
AA
AA
Human
Comfort
AA+
B
B
AA
FIGURE 9 Environmental control classifications.
71.5
71.0
Space Temperature (°F)
70.5
70.0
69.5
69.0
68.5
68.0
0
10
20
30
40
Space Humidity
50
60
70
FIGURE 11 Average of January 2019 critical temperature and humidity trends.
Figure 10 Virtual design model vs. as-built.
for energy-efficiency measures, with simple paybacks
in fewer than seven years. In early phases, pricing
energy and studies concluded that a water-cooled
chiller was the most effective cooling system, with
a simple payback of 4.6 years over air-cooled chillers, and condensing boilers were established as the
appropriate heating system. Further design refinements were analyzed, such as solar PV, solar hotwater heating, total energy recovery air-handling
38
ASHRAE JOURNAL
ashrae.org
J U N E 2020
pretreatment, and heat-recovery chillers. Each
improved on energy performance, but, ultimately,
the heat-recovery chiller option was identified as
the most cost-effective strategy to meet the project's
energy-efficiency goals, and provided the client with
the desired flexibility/critical systems control, with a
simple payback of 6.2 years. The mechanical systems
make up almost all of the energy reduction, as the
savings associated with the LED lighting system and
high-performance lighting control system savings
were dampened by the climate control system. The
results of the analysis and systems utilized resulted
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ASHRAE Journal - June 2020
Table of Contents for the Digital Edition of ASHRAE Journal - June 2020
Contents
ASHRAE Journal - June 2020 - Intro
ASHRAE Journal - June 2020 - Cover1
ASHRAE Journal - June 2020 - Cover2
ASHRAE Journal - June 2020 - 1
ASHRAE Journal - June 2020 - Contents
ASHRAE Journal - June 2020 - 3
ASHRAE Journal - June 2020 - 4
ASHRAE Journal - June 2020 - 5
ASHRAE Journal - June 2020 - 6
ASHRAE Journal - June 2020 - 7
ASHRAE Journal - June 2020 - 8
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ASHRAE Journal - June 2020 - 20
ASHRAE Journal - June 2020 - 21
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ASHRAE Journal - June 2020 - Cover3
ASHRAE Journal - June 2020 - Cover4
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