ASHRAE Journal - December 2021 - 2

CONTENTS
December 2021
FEATURES
Key Factors of Fan System
Wire-to-Air Effi ciency
By B. Rajavel; Tom Bise;
Paul Bauch
14
Improving Fan System Effi ciency
Sizing Vertical
Ground Heat Exchangers
By Mohammadamin Ahmadfard;
Michel Bernier, Ph.D., P.Eng.
24
Spreadsheet Tool for Sizing Vertical
Geothermal Boreholes
Technology Award
New Chillers Key
To Energy Reduction
By Raymond M.H. Yau, Ph.D.;
Barry K.P. Lau
44
Chiller Plant Energy Consumption
Reduced 26%
DEPARTMENTS
4 Commentary
12 Meetings and Shows
111 Classifi ed Advertising
6 Industry News
50 Products
112 Advertisers Index
About the Cover Article
Fan arrays (pictured on the cover) play a critical role in moving air through air-handling systems.
Design engineers looking to incorporate energy-effi cient solutions into building designs should have
fan selection as one of the leading factors to consider when improving wire-to-air effi ciency.
2
D E C E M B E R 2 0 2 1 ashrae.o rg ASHRAE JOURNAL
10 Letters
108 Info Center
STANDING COLUMNS
22 HVAC Applications
Understanding Three
Generations of DOAU
By Arthur D. Hallstrom, P.E.
38 Engineer's Notebook
Recovering Heat
For Snow Melting
By Kelley Cramm, P.E.
48 Refrigeration Applications
Quality and Equality
By Andy Pearson, Ph.D., C.Eng.
Advertising Section
51 Suppliers' New Product Preview
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V O L U M E 63, N O. 12

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ASHRAE Journal - December 2021

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