ASHRAE Journal - March 2013 - 72

2013 Technology Award Case Studies
thermo-leaks, and they were all judged to be in good condition
given their age.

Conclusion
The mechanical system at Hamilton Heights Elementary School
(DOAS with room neutral delivery) requires a summer reheat
source for humidity control, and, in that situation, a DHRC is the
energy-efﬁcient solution. System selections that do not require
summer reheat will not ﬁnd the dedicated heat recovery chiller
enhanced runaround coils solution as beneﬁcial. And, of course,
comparative costs of gas and electricity will affect the savings.
The dedicated heat recovery chiller enhanced runaround coils
arrangement offers many beneﬁts in the school’s design. It is
even more beneﬁcial when the main chiller is air cooled. Where
the lack of space limited the heat recovery options, the DHRC
enhanced runaround coils took less room than a conventional
runaround system and than a “no energy recovery” system.
The dedicated heat recovery chiller enhanced runaround
coils saved money in all operating hours, including the moderate outdoor temperatures when small differences between
inside and outdoor airstream make air-to-air energy recovery
devices ineffective. The DRHC enhanced version saved 70%
more energy than a conventional runaround coil, although it
was not as efﬁcient in the coldest weather. This would dictate

Figure 4: Thermoscan image of gym entry.

that future versions have the ability to function as conventional runaround coils in winter, and DHRC enhanced runaround
coils the rest of the time.

References
1. Durkin, T.H., J.B. Rishel. 2003. “Dedicated heat recovery.”
ASHRAE Journal 45(10).

www.info.hotims.com/44630-46

72

ASHRAE Journal

March 2013

ASHRAE Journal - March 2013

Table of Contents for the Digital Edition of ASHRAE Journal - March 2013

ASHRAE Journal - March 2013
Contents
Commentary
Show Coverage
Meetings and Shows
Feature Articles
2013 ASHRAE Technology Awards
Commissioning Existing Airside Economizer Systems
How Indoor Environment Affects Performance
Thermally Active Floors: Part 3: Making it Work
Technology Award Case Studies:
Data Center Dilemma
Heat Recovery for School
Standing Columns
Data Centers
Refrigeration Applications
Emerging Technologies
IAQ Applications
Engineer's Notebook
Classified Advertising
Advertisers Index
ASHRAE Journal - March 2013 - Intro
ASHRAE Journal - March 2013 - ASHRAE Journal - March 2013
ASHRAE Journal - March 2013 - Cover2
ASHRAE Journal - March 2013 - 1
ASHRAE Journal - March 2013 - 2
ASHRAE Journal - March 2013 - Contents
ASHRAE Journal - March 2013 - Commentary
ASHRAE Journal - March 2013 - 5
ASHRAE Journal - March 2013 - Show Coverage
ASHRAE Journal - March 2013 - 7
ASHRAE Journal - March 2013 - 8
ASHRAE Journal - March 2013 - 9
ASHRAE Journal - March 2013 - 10
ASHRAE Journal - March 2013 - 11
ASHRAE Journal - March 2013 - 12
ASHRAE Journal - March 2013 - 13
ASHRAE Journal - March 2013 - Meetings and Shows
ASHRAE Journal - March 2013 - 15
ASHRAE Journal - March 2013 - 16
ASHRAE Journal - March 2013 - 17
ASHRAE Journal - March 2013 - 2013 ASHRAE Technology Awards
ASHRAE Journal - March 2013 - 19
ASHRAE Journal - March 2013 - 20
ASHRAE Journal - March 2013 - 21
ASHRAE Journal - March 2013 - 22
ASHRAE Journal - March 2013 - 23
ASHRAE Journal - March 2013 - 24
ASHRAE Journal - March 2013 - 25
ASHRAE Journal - March 2013 - 26
ASHRAE Journal - March 2013 - 27
ASHRAE Journal - March 2013 - 28
ASHRAE Journal - March 2013 - 29
ASHRAE Journal - March 2013 - 30
ASHRAE Journal - March 2013 - 31
ASHRAE Journal - March 2013 - 32
ASHRAE Journal - March 2013 - 33
ASHRAE Journal - March 2013 - Commissioning Existing Airside Economizer Systems
ASHRAE Journal - March 2013 - 35
ASHRAE Journal - March 2013 - 36
ASHRAE Journal - March 2013 - 37
ASHRAE Journal - March 2013 - 38
ASHRAE Journal - March 2013 - 39
ASHRAE Journal - March 2013 - 40
ASHRAE Journal - March 2013 - 41
ASHRAE Journal - March 2013 - 42
ASHRAE Journal - March 2013 - 43
ASHRAE Journal - March 2013 - 44
ASHRAE Journal - March 2013 - 45
ASHRAE Journal - March 2013 - How Indoor Environment Affects Performance
ASHRAE Journal - March 2013 - 47
ASHRAE Journal - March 2013 - 48
ASHRAE Journal - March 2013 - 49
ASHRAE Journal - March 2013 - 50
ASHRAE Journal - March 2013 - 51
ASHRAE Journal - March 2013 - 52
ASHRAE Journal - March 2013 - 53
ASHRAE Journal - March 2013 - Thermally Active Floors: Part 3: Making it Work
ASHRAE Journal - March 2013 - 55
ASHRAE Journal - March 2013 - 56
ASHRAE Journal - March 2013 - 57
ASHRAE Journal - March 2013 - 58
ASHRAE Journal - March 2013 - 59
ASHRAE Journal - March 2013 - 60
ASHRAE Journal - March 2013 - 61
ASHRAE Journal - March 2013 - Data Center Dilemma
ASHRAE Journal - March 2013 - 63
ASHRAE Journal - March 2013 - 64
ASHRAE Journal - March 2013 - 65
ASHRAE Journal - March 2013 - 66
ASHRAE Journal - March 2013 - 67
ASHRAE Journal - March 2013 - Heat Recovery for School
ASHRAE Journal - March 2013 - 69
ASHRAE Journal - March 2013 - 70
ASHRAE Journal - March 2013 - 71
ASHRAE Journal - March 2013 - 72
ASHRAE Journal - March 2013 - 73
ASHRAE Journal - March 2013 - Data Centers
ASHRAE Journal - March 2013 - 75
ASHRAE Journal - March 2013 - 76
ASHRAE Journal - March 2013 - 77
ASHRAE Journal - March 2013 - 78
ASHRAE Journal - March 2013 - Refrigeration Applications
ASHRAE Journal - March 2013 - Emerging Technologies
ASHRAE Journal - March 2013 - 81
ASHRAE Journal - March 2013 - 82
ASHRAE Journal - March 2013 - 83
ASHRAE Journal - March 2013 - IAQ Applications
ASHRAE Journal - March 2013 - 85
ASHRAE Journal - March 2013 - Engineer's Notebook
ASHRAE Journal - March 2013 - 87
ASHRAE Journal - March 2013 - 88
ASHRAE Journal - March 2013 - 89
ASHRAE Journal - March 2013 - 90
ASHRAE Journal - March 2013 - 91
ASHRAE Journal - March 2013 - 92
ASHRAE Journal - March 2013 - 93
ASHRAE Journal - March 2013 - 94
ASHRAE Journal - March 2013 - Classified Advertising
ASHRAE Journal - March 2013 - Advertisers Index
ASHRAE Journal - March 2013 - Cover3
ASHRAE Journal - March 2013 - Cover4
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