ASHRAE Journal - August 2008 - (Page 32) C O I L C O I L Figure 3 (left): Typical in-duct UVGI installation for surface disinfection. Reflectors are used to focus the UV energy on the surface(s) of interest. Figure 4 (right): Typical in-duct UVGI installation for air disinfection. Reflectors are not used, so the UV energy can be distributed throughout the air path. Air disinfection systems mounted within 3 ft (0.9 m) of surfaces are capable of disinfecting the air and surfaces simultaneously. per week. Continuous exposure allows for a UV dose effective at preventing microbial growth on surfaces at relatively low levels of irradiation. Air Disinfection Because reflectors focus UV energy onto the surface to be cleaned, surface disinfection systems are often inadequate for proper air disinfection. On the other hand, properly designed air disinfection systems are capable of disinfecting air while maintaining surface cleanliness. These systems usually do not have reflectors or lamp ballast assemblies that block UV energy (Figure 4). Instead, enhancing the overall reflectivity of the inside of the duct or AHU can improve system performance by reflecting UVC energy back into the irradiance zone, increasing the effective UV dose. Regardless of the design, the principle objective is to distribute UV energy in all directions throughout 32 ASHRAE Journal August 2008
Table of Contents Feed for the Digital Edition of ASHRAE Journal - August 2008 ASHRAE Journal - August 2008 Contents Commentary Industry News Letters Meetings and Shows Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise Ultraviolet Germicidal Irradiation: Current Best Practices Improving Humidity Control With Energy Recovery Ventilation Single- or Two-Stage Compression Data Center Cooling: Using Wet-Bulb Economizers Building Sciences InfoCenter Practical Pointers Products Emerging Technologies Washington Report People Special Products Classified Advertising Advertising Index ASHRAE Journal - August 2008 ASHRAE Journal - August 2008 - ASHRAE Journal - August 2008 (Page Cover1) ASHRAE Journal - August 2008 - ASHRAE Journal - August 2008 (Page Cover2) ASHRAE Journal - August 2008 - ASHRAE Journal - August 2008 (Page 1) ASHRAE Journal - August 2008 - ASHRAE Journal - August 2008 (Page 2) ASHRAE Journal - August 2008 - Contents (Page 3) ASHRAE Journal - August 2008 - Contents (Page 4) ASHRAE Journal - August 2008 - Commentary (Page 5) ASHRAE Journal - August 2008 - Industry News (Page 6) ASHRAE Journal - August 2008 - Industry News (Page 7) ASHRAE Journal - August 2008 - Industry News (Page 8) ASHRAE Journal - August 2008 - Industry News (Page 9) ASHRAE Journal - August 2008 - Industry News (Page 10) ASHRAE Journal - August 2008 - Industry News (Page 11) ASHRAE Journal - August 2008 - Industry News (Page 12) ASHRAE Journal - August 2008 - Industry News (Page 13) ASHRAE Journal - August 2008 - Industry News (Page 14) ASHRAE Journal - August 2008 - Industry News (Page 15) ASHRAE Journal - August 2008 - Industry News (Page 16) ASHRAE Journal - August 2008 - Industry News (Page BA1) ASHRAE Journal - August 2008 - Industry News (Page BA2) ASHRAE Journal - August 2008 - Letters (Page 17) ASHRAE Journal - August 2008 - Meetings and Shows (Page 18) ASHRAE Journal - August 2008 - Meetings and Shows (Page 19) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 20) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 21) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 22) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 23) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 24) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 25) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 26) ASHRAE Journal - August 2008 - Maintain to Sustain—Delivering ASHRAE’s Sustainability Promise (Page 27) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 28) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 29) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 30) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 31) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 32) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 33) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 34) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 35) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 36) ASHRAE Journal - August 2008 - Ultraviolet Germicidal Irradiation: Current Best Practices (Page 37) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 38) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 39) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 40) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 41) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 42) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 43) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 44) ASHRAE Journal - August 2008 - Improving Humidity Control With Energy Recovery Ventilation (Page 45) ASHRAE Journal - August 2008 - Single- or Two-Stage Compression (Page 46) ASHRAE Journal - August 2008 - Single- or Two-Stage Compression (Page 47) ASHRAE Journal - August 2008 - Single- or Two-Stage Compression (Page 48) ASHRAE Journal - August 2008 - Single- or Two-Stage Compression (Page 49) ASHRAE Journal - August 2008 - Single- or Two-Stage Compression (Page 50) ASHRAE Journal - August 2008 - Single- or Two-Stage Compression (Page 51) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 52) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 53) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 54) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 55) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 56) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page ACP1) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page ACP2) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page ACP3) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page ACP4) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page ACP5) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page ACP6) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 57) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 58) ASHRAE Journal - August 2008 - Data Center Cooling: Using Wet-Bulb Economizers (Page 59) ASHRAE Journal - August 2008 - Building Sciences (Page 60) ASHRAE Journal - August 2008 - Building Sciences (Page 61) ASHRAE Journal - August 2008 - Building Sciences (Page 62) ASHRAE Journal - August 2008 - Building Sciences (Page 63) ASHRAE Journal - August 2008 - Building Sciences (Page 64) ASHRAE Journal - August 2008 - Building Sciences (Page 65) ASHRAE Journal - August 2008 - InfoCenter (Page 66) ASHRAE Journal - August 2008 - InfoCenter (Page 67) ASHRAE Journal - August 2008 - InfoCenter (Page 68) ASHRAE Journal - August 2008 - InfoCenter (Page 69) ASHRAE Journal - August 2008 - InfoCenter (Page 70) ASHRAE Journal - August 2008 - InfoCenter (Page 71) ASHRAE Journal - August 2008 - Practical Pointers (Page 72) ASHRAE Journal - August 2008 - Practical Pointers (Page 73) ASHRAE Journal - August 2008 - Products (Page 74) ASHRAE Journal - August 2008 - Products (Page 75) ASHRAE Journal - August 2008 - Emerging Technologies (Page 76) ASHRAE Journal - August 2008 - Emerging Technologies (Page 77) ASHRAE Journal - August 2008 - Emerging Technologies (Page 78) ASHRAE Journal - August 2008 - Emerging Technologies (Page 79) ASHRAE Journal - August 2008 - Washington Report (Page 80) ASHRAE Journal - August 2008 - People (Page 81) ASHRAE Journal - August 2008 - Special Products (Page 82) ASHRAE Journal - August 2008 - Special Products (Page 83) ASHRAE Journal - August 2008 - Special Products (Page 84) ASHRAE Journal - August 2008 - Classified Advertising (Page 85) ASHRAE Journal - August 2008 - Classified Advertising (Page 86) ASHRAE Journal - August 2008 - Classified Advertising (Page 87) ASHRAE Journal - August 2008 - Advertising Index (Page 88) ASHRAE Journal - August 2008 - Advertising Index (Page Cover3) ASHRAE Journal - August 2008 - Advertising Index (Page Cover4)
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.