Engineered Systems - February 2009 - (Page 26) Humidification In Health Care Point name Airflow (L/sec) 18,880 “ “ “ “ “ Drybulb (˚C) -15 20 20 -15 24 24 Rh (%) Total energy (Btuh) 3,549,754 4,517,607 Sensible energy (Btuh) 2,743,522 2,765,756 Latent energy (Btuh) 806,232 1,751,851 *Cost/day (steam at $1.50/therm) $290.24 $630.67 Additional cost Outdoor air Supply air, low rh Supply air, high rh Outdoor air Supply air, low rh Supply air, high rh 60 30 60 60 30 60 4,129,490 5,371,656 3,063,882 3,095,692 1,065,608 2,275,964 $383.62 $819.35 $435.73 $340.42 * Including energy, water, and boiler plant efficiency costs. UVC in HVAC systems: Good practice. Steril-Aire UVC: Best practice! Multi-patented UVC Emitters™ deliver the BEST SAVINGS: Up to 15% on HVAC energy costs; slashes A/C coil cleaning costs and eliminates use of biocides. BEST PERFORMANCE: Up to 6 times higher UVC output, for longer life and better germicidal performance. Backed by over a dozen patents and 12 industry awards. BEST INFECTION CONTROL: Reduces spread of viruses and bacteria, lowers nosocomial infection rates. BEST IAQ: Kills mold, biofilm and circulating microbes; enhances indoor air quality and comfort. BEST ACCEPTANCE: Used by the Florida Hospital system, Cedars-Sinai (Los Angeles), Queen’s Medical Center (Honolulu), Rio Grande (Texas) and many more. ENERGY DATA: Rio Grande Regional Hospital reports dramatic HVAC energy savings since installing Steril-Aire lights. From Electrical Cost ($) TABLE 1. Acceptable variation in rh and temperature vs. cost and energy for a 40,000 cfm 100% outdoor air system. While it is nice to have a broad guideline like this to allow some flexibility for control of conditions, why would we ever want to maintain temperature or humidity at the higher rh and temperature states, and what would be the cost to do this? Well, the 1/07 – 5/07, electrical costs dropped $240,885 or 29.5% vs. the same period in 2006. That’s a savings of $500,000+/per yr. JAN FEB MAR APR MAY Get the full story on what UVC can do for healthcare facilities. Steril-Aire, Inc. 800-2STERIL or 818-565-1128 email: sales@steril-aire.com web: www.steril-aire.com/story Input 20 at www.esmagazine.com/instantproductinfo Boiler water chemical additives are often cited as a concern, but according to ASHRAE, plant steam can be introduced into health care spaces — as long as it meets the USDH FDA requirements qi t of 173.310 in the 3 Code of Federal Regulations CFR21. This code, of course, cites numerous possible chemical additives and their limitations in the steam, especially if the steam comes in contact with milk or milk products such as in food preparation areas. 26 En gi neer ed S y stem s February 2009 1/21/09 10:01:35 AM ESM02094Steril.indd 1 http://www.steril-aire.com/story http://www.steril-aire.com/story http://www.esmagazine.com/instantproductinfo
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