ASHRAE Journal - November 2011 - 27

• A critical valve was inadvertently not connected to the control system, resulting in excessive heating and extensive simultaneous heating and cooling. • A preheat coil controller had been set at 110°F (43°C) during a start-up test and associated control sequences were severely sub-optimized. • The absence of alarms for pre-heat temperatures. • Presence of frustrating controls and user interfaces that resulted in their being devalued and ignored. • Air was over-dehumidified in one process, and had to be over-humidified in response to meet space setpoint conditions. The result of correcting these deficiencies was $60,000 to $80,000 per year in energy savings, at a one-time commissioning cost of $4,700 to $8,000. The corrections also yielded significant safety enhancing benefits, which helped avoid costly future disruptions and potentially costly contamination of the process, resulting in product quality deficiencies. This project did not have the benefit of a measured baseline and postcommissioning measured savings. An estimate of savings was based on a calculated baseline rooted in an observed operating condition combined with calculated savings based on what engineering principles say will happen after correcting problems identified in the commissioning process. With this in mind, a rough extrapolation of lessons learned to the rest of the facility (not yet completed at the time of the study), suggested annual savings of about $540,000, or about 30% of the facility’s entire energy bill, and a payback time of 0.01 years (about four days). As with any case study, these specific results will not necessarily apply to other similar facilities, but the story serves as a clear indication that commissioning in cleanrooms should be taken quite seriously and that further study is merited.

to right-size mechanical systems, thereby saving on capital costs during original construction or future retrofit/replacement. We documented a dramatic example of this in the Advanced Light Source facility at Lawrence Berkeley National Laboratory (sidebar, Page 20) in which huge cost savings were garnered by scaling back a new chiller from more than 450 tons to

First Cost Savings Can Eclipse Ongoing Energy Savings
An oft-cited non-energy benefit from commissioning—and one of the largest in terms of economic value—is helping
November 2011
www.info.hotims.com/37992-35

ASHRAE Journal

27



ASHRAE Journal - November 2011

Table of Contents for the Digital Edition of ASHRAE Journal - November 2011

ASHRAE Journal - November 2011
Contents
Commentary
Industry News
Letters
Meetings and Shows
Feature Articles
Commissioning High-Tech Facilities
Streamlining Energy Simulation to Identify Building Retrofits
Technology Award Case Studies:
Laundry Upgrade
Creating a Healing Environment: Efficient Hospital
Standing Columns
Emerging Technologies
Products
Special Supplement: BACnet® Today and the Smart Grid
Commentary
BACnet: Operator Workstations
BACnet Alarming Revised
Information Model Standard for Integrating Facilities with Smart Grid
Demand Response and Standards: New Role for Buildings in the Smart Grid
Getting Smart on the Electrical Grid
Washington Report
Special Section
InfoCenter
IAQ Applications
Classified Advertising
Advertisers Index
ASHRAE Journal - November 2011 - ASHRAE Journal - November 2011
ASHRAE Journal - November 2011 - Cover2
ASHRAE Journal - November 2011 - 1
ASHRAE Journal - November 2011 - 2
ASHRAE Journal - November 2011 - Contents
ASHRAE Journal - November 2011 - Commentary
ASHRAE Journal - November 2011 - 5
ASHRAE Journal - November 2011 - Industry News
ASHRAE Journal - November 2011 - 7
ASHRAE Journal - November 2011 - Letters
ASHRAE Journal - November 2011 - 9
ASHRAE Journal - November 2011 - 10
ASHRAE Journal - November 2011 - 11
ASHRAE Journal - November 2011 - 12
ASHRAE Journal - November 2011 - 13
ASHRAE Journal - November 2011 - 14
ASHRAE Journal - November 2011 - 15
ASHRAE Journal - November 2011 - Meetings and Shows
ASHRAE Journal - November 2011 - 17
ASHRAE Journal - November 2011 - Commissioning High-Tech Facilities
ASHRAE Journal - November 2011 - 19
ASHRAE Journal - November 2011 - 20
ASHRAE Journal - November 2011 - 21
ASHRAE Journal - November 2011 - 22
ASHRAE Journal - November 2011 - 23
ASHRAE Journal - November 2011 - 24
ASHRAE Journal - November 2011 - 25
ASHRAE Journal - November 2011 - 26
ASHRAE Journal - November 2011 - 27
ASHRAE Journal - November 2011 - 28
ASHRAE Journal - November 2011 - 29
ASHRAE Journal - November 2011 - 30
ASHRAE Journal - November 2011 - 31
ASHRAE Journal - November 2011 - Streamlining Energy Simulation to Identify Building Retrofits
ASHRAE Journal - November 2011 - 33
ASHRAE Journal - November 2011 - 34
ASHRAE Journal - November 2011 - 35
ASHRAE Journal - November 2011 - 36
ASHRAE Journal - November 2011 - 37
ASHRAE Journal - November 2011 - 38
ASHRAE Journal - November 2011 - 39
ASHRAE Journal - November 2011 - 40
ASHRAE Journal - November 2011 - 41
ASHRAE Journal - November 2011 - 42
ASHRAE Journal - November 2011 - 43
ASHRAE Journal - November 2011 - Laundry Upgrade
ASHRAE Journal - November 2011 - 45
ASHRAE Journal - November 2011 - 46
ASHRAE Journal - November 2011 - 47
ASHRAE Journal - November 2011 - 48
ASHRAE Journal - November 2011 - 49
ASHRAE Journal - November 2011 - 50
ASHRAE Journal - November 2011 - 51
ASHRAE Journal - November 2011 - Creating a Healing Environment: Efficient Hospital
ASHRAE Journal - November 2011 - 53
ASHRAE Journal - November 2011 - 54
ASHRAE Journal - November 2011 - 55
ASHRAE Journal - November 2011 - 56
ASHRAE Journal - November 2011 - 57
ASHRAE Journal - November 2011 - Emerging Technologies
ASHRAE Journal - November 2011 - 59
ASHRAE Journal - November 2011 - 60
ASHRAE Journal - November 2011 - 61
ASHRAE Journal - November 2011 - 62
ASHRAE Journal - November 2011 - 63
ASHRAE Journal - November 2011 - Products
ASHRAE Journal - November 2011 - Special Supplement: BACnet® Today and the Smart Grid
ASHRAE Journal - November 2011 - B2
ASHRAE Journal - November 2011 - B3
ASHRAE Journal - November 2011 - Commentary
ASHRAE Journal - November 2011 - B5
ASHRAE Journal - November 2011 - BACnet: Operator Workstations
ASHRAE Journal - November 2011 - B7
ASHRAE Journal - November 2011 - B8
ASHRAE Journal - November 2011 - B9
ASHRAE Journal - November 2011 - B10
ASHRAE Journal - November 2011 - B11
ASHRAE Journal - November 2011 - BACnet Alarming Revised
ASHRAE Journal - November 2011 - B13
ASHRAE Journal - November 2011 - B14
ASHRAE Journal - November 2011 - B15
ASHRAE Journal - November 2011 - B16
ASHRAE Journal - November 2011 - B17
ASHRAE Journal - November 2011 - Information Model Standard for Integrating Facilities with Smart Grid
ASHRAE Journal - November 2011 - B19
ASHRAE Journal - November 2011 - B20
ASHRAE Journal - November 2011 - B21
ASHRAE Journal - November 2011 - B22
ASHRAE Journal - November 2011 - Demand Response and Standards: New Role for Buildings in the Smart Grid
ASHRAE Journal - November 2011 - B24
ASHRAE Journal - November 2011 - B25
ASHRAE Journal - November 2011 - B26
ASHRAE Journal - November 2011 - B27
ASHRAE Journal - November 2011 - B28
ASHRAE Journal - November 2011 - Getting Smart on the Electrical Grid
ASHRAE Journal - November 2011 - B30
ASHRAE Journal - November 2011 - B31
ASHRAE Journal - November 2011 - B32
ASHRAE Journal - November 2011 - B33
ASHRAE Journal - November 2011 - B34
ASHRAE Journal - November 2011 - B35
ASHRAE Journal - November 2011 - B36
ASHRAE Journal - November 2011 - Washington Report
ASHRAE Journal - November 2011 - InfoCenter
ASHRAE Journal - November 2011 - 67
ASHRAE Journal - November 2011 - 68
ASHRAE Journal - November 2011 - 69
ASHRAE Journal - November 2011 - 70
ASHRAE Journal - November 2011 - 71
ASHRAE Journal - November 2011 - 72
ASHRAE Journal - November 2011 - IAQ Applications
ASHRAE Journal - November 2011 - 74
ASHRAE Journal - November 2011 - 75
ASHRAE Journal - November 2011 - 76
ASHRAE Journal - November 2011 - 77
ASHRAE Journal - November 2011 - Classified Advertising
ASHRAE Journal - November 2011 - 79
ASHRAE Journal - November 2011 - Advertisers Index
ASHRAE Journal - November 2011 - Cover3
ASHRAE Journal - November 2011 - Cover4
ASHRAE Journal - November 2011 - 121
ASHRAE Journal - November 2011 - 122
ASHRAE Journal - November 2011 - 123
ASHRAE Journal - November 2011 - 124
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