ASHRAE Journal - December 2009 - 40

Jan. Feb. Mar. Apr. May June July ft2) Aug. Sept. Oct. Nov. Dec. Avg. Subject Building (375,909 Total kWh Total kWh/ft2 603,191 1.60 620,557 1.65 710,214 1.89 792,539 2.11 670,842 1.78 682,702 1.82 757,313 2.01 718,749 1.91 735,248 1.96 721,284 1.92 723,278 1.92 782,832 2.08 709,896 1.89 Avg. Comparable Building (188,321 ft2) Total kWh Total kWh/ft2 752,548 4.00 629,850 3.34 573,740 3.05 589,647 3.13 576,489 3.06 599,758 3.18 635,405 3.37 566,343 3.01 596,489 3.17 580,019 3.08 561,847 2.98 606,702 3.22 605,736 3.22 Table 2: Monthly electrical energy consumption comparison to a traditional VAV system. return air temperature to the facility’s air-handling units is lower than expected. This poses a challenge under dehumidification/ reheat conditions. Pursuing this issue further, chilled beams in the immediate vicinity of above-ceiling return air openings are experiencing reverse airflow, contributing to lower-than-anticipated return air temperatures. These beams were unobtrusively blanked off. The conclusion is that, despite taking the precaution of a detailed CFD, airflow is not always entirely predictable, especially when using an innovative approach that has not been tried and tested. Fortunately, cool airflow from correctly functioning chilled beams does not appear to have an adverse impact on floor diffuser performance. In fact, occupant comfort has exceeded expectations. Comfort-related complaints averaged only 28 per month for the 1,700 employees who occupied the building during 2008. Conclusions It was essential the design team understood the objectives and critical considerations of the project to ensure each was incorporated into the finished design. The innovative air-side system developed in this project combined the existing technologies of UFAD, passive chilled beams, series use of chilled water, and AHU return-air bypass, to yield an efficient system that provides a significant reduction in energy consumption and good occupant comfort. References 1. Dieckmann, J., K. Roth, J. Brodrick. 2004. “Radiant ceiling cooling,” ASHRAE Journal 46(6):42 – 43. 2. Roth, K., et al. 2007. “Chilled beam cooling.” ASHRAE Journal 49(9):84 – 86. FLOWHOOD ELECTRONIC FLOWHOOD DIRECT DIGITAL READOUT 25-2500 CFM AUTOMATICALLY CORRECTS FOR AIR DENSITY & BACKPRESSURE CHOICE OF METERS - AIR FLOW ONLY, OR AIR FLOW, VELOCITY, PRESSURE & TEMPERATURE OPTIONS INCLUDE: MEMORY, AVERAGE & SUM TO 2000 READINGS, SEQUENTIAL RECALL, AUTO-READ REPAIR POLICY - TWO WEEK TURNAROUND OR LESS CUSTOM TOPS MADE TO ORDER Shortridge Instruments, Inc. 7855 East Redfield Road • Scottsdale, Arizona 85260 (480) 991-6744 FAX (480) 443-1267 www.info.hotims.com/25211-34 www.info.hotims.com/25211-39 ASHRAE Journal December 2009

ASHRAE Journal - December 2009

Table of Contents for the Digital Edition of ASHRAE Journal - December 2009

ASHRAE Journal - December 2009
Contents
Commentary
Industry News
Letters
Meetings and Shows
Feature Articles
ASHRAE Building EQ Program
A Closer Look at Chiller Ratings
Cooling With Less Air: Using Underfloor Air Distribution and Chilled Beams
Cooling Concrete: Containerized Water Chilling Plant
Geothermal for Community Center
Anniversary Feature: Air-Recovery System Versus Conventional Air Conditioning
Technical Topics
New Product Preview
Products
Emerging Technologies
Washington Report
People
Special Products
2009 Feature Articles Indices
Classified Advertising
Advertisers Index
ASHRAE Journal - December 2009 - ASHRAE Journal - December 2009
ASHRAE Journal - December 2009 - Cover2
ASHRAE Journal - December 2009 - 1
ASHRAE Journal - December 2009 - 2
ASHRAE Journal - December 2009 - Contents
ASHRAE Journal - December 2009 - 4
ASHRAE Journal - December 2009 - Commentary
ASHRAE Journal - December 2009 - Industry News
ASHRAE Journal - December 2009 - 7
ASHRAE Journal - December 2009 - 8
ASHRAE Journal - December 2009 - 9
ASHRAE Journal - December 2009 - 10
ASHRAE Journal - December 2009 - Letters
ASHRAE Journal - December 2009 - 12
ASHRAE Journal - December 2009 - 13
ASHRAE Journal - December 2009 - 14
ASHRAE Journal - December 2009 - 15
ASHRAE Journal - December 2009 - Meetings and Shows
ASHRAE Journal - December 2009 - 17
ASHRAE Journal - December 2009 - ASHRAE Building EQ Program
ASHRAE Journal - December 2009 - 19
ASHRAE Journal - December 2009 - 20
ASHRAE Journal - December 2009 - 21
ASHRAE Journal - December 2009 - A Closer Look at Chiller Ratings
ASHRAE Journal - December 2009 - 23
ASHRAE Journal - December 2009 - 24
ASHRAE Journal - December 2009 - 25
ASHRAE Journal - December 2009 - 26
ASHRAE Journal - December 2009 - 27
ASHRAE Journal - December 2009 - 28
ASHRAE Journal - December 2009 - 29
ASHRAE Journal - December 2009 - 30
ASHRAE Journal - December 2009 - 31
ASHRAE Journal - December 2009 - 32
ASHRAE Journal - December 2009 - 33
ASHRAE Journal - December 2009 - Cooling With Less Air: Using Underfloor Air Distribution and Chilled Beams
ASHRAE Journal - December 2009 - 35
ASHRAE Journal - December 2009 - 36
ASHRAE Journal - December 2009 - 37
ASHRAE Journal - December 2009 - 38
ASHRAE Journal - December 2009 - 39
ASHRAE Journal - December 2009 - 40
ASHRAE Journal - December 2009 - 41
ASHRAE Journal - December 2009 - Cooling Concrete: Containerized Water Chilling Plant
ASHRAE Journal - December 2009 - 43
ASHRAE Journal - December 2009 - 44
ASHRAE Journal - December 2009 - 45
ASHRAE Journal - December 2009 - 46
ASHRAE Journal - December 2009 - 47
ASHRAE Journal - December 2009 - Geothermal for Community Center
ASHRAE Journal - December 2009 - 49
ASHRAE Journal - December 2009 - 50
ASHRAE Journal - December 2009 - 51
ASHRAE Journal - December 2009 - Anniversary Feature: Air-Recovery System Versus Conventional Air Conditioning
ASHRAE Journal - December 2009 - 53
ASHRAE Journal - December 2009 - 54
ASHRAE Journal - December 2009 - 55
ASHRAE Journal - December 2009 - 56
ASHRAE Journal - December 2009 - 57
ASHRAE Journal - December 2009 - 58
ASHRAE Journal - December 2009 - 59
ASHRAE Journal - December 2009 - 60
ASHRAE Journal - December 2009 - 61
ASHRAE Journal - December 2009 - Technical Topics
ASHRAE Journal - December 2009 - 63
ASHRAE Journal - December 2009 - 64
ASHRAE Journal - December 2009 - New Product Preview
ASHRAE Journal - December 2009 - 66
ASHRAE Journal - December 2009 - 67
ASHRAE Journal - December 2009 - 68
ASHRAE Journal - December 2009 - 69
ASHRAE Journal - December 2009 - 70
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ASHRAE Journal - December 2009 - 112
ASHRAE Journal - December 2009 - 113
ASHRAE Journal - December 2009 - Products
ASHRAE Journal - December 2009 - 115
ASHRAE Journal - December 2009 - 116
ASHRAE Journal - December 2009 - Emerging Technologies
ASHRAE Journal - December 2009 - Washington Report
ASHRAE Journal - December 2009 - 119
ASHRAE Journal - December 2009 - People
ASHRAE Journal - December 2009 - Special Products
ASHRAE Journal - December 2009 - 2009 Feature Articles Indices
ASHRAE Journal - December 2009 - 123
ASHRAE Journal - December 2009 - 124
ASHRAE Journal - December 2009 - 125
ASHRAE Journal - December 2009 - Classified Advertising
ASHRAE Journal - December 2009 - 127
ASHRAE Journal - December 2009 - Advertisers Index
ASHRAE Journal - December 2009 - Cover3
ASHRAE Journal - December 2009 - Cover4
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