I remember working as an operator on shift at a site in London (mid 80's). Think we had a 3081/3084. The water cooling was done by a bank of radiators out in the car park. The site was set on a roundabout and during the summer months the radiators would get so clogged up with the heat/congestion and general rubbish flying about that they employed a guy to just hose down the radiators during the peak times of the day ... Water cooling the water cooling system ... :-).
"Rick Fochtman" <[email protected]> Sent by: "IBM Mainframe Discussion List" <[email protected]> 18/02/2010 01:47 AM Please respond to "IBM Mainframe Discussion List" <[email protected]> To [email protected] cc Subject Re: What was old is new again (water chilled) In no particular order: 1. The energy needed to pump the water around the circuit 2. Subsequent cooling of the water, or disposal and replenishment 3. Added footprint for water-handling equipment. 4. Justify the need for water cooling; could it be that the energy consumption of the equipment being cooled is significantly higher than customary for other similar-scale equipment? Energy being wasted, and radiated, as heat? In the days of the 3090 series, these were ALL significant costs and concerns. Just because the basic machine might be "better", does the additional support cost justify the machine investment? My former employers thought not; we were among the first in the Midwest to install 9672 technology when it became available. Our energy costs went from $3.75/hr. to $0.29/hr, with a significant upgrade in overall business throughput. I know because I did all the research and monitoring. We also had to do some serious engineering on the building structure to support the weight of those 3090 boxes. Floor loading went from 1200 lb/sq. ft to 2400lb./sq. ft. with 3090 gear and that all went away with the 9672 equipment. Rick ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html This e-mail message, including any attachments transmitted with it, is CONFIDENTIAL and may contain legally privileged information. This message is intended solely for the use of the individual or entity to whom it is addressed. If you have received this message in error, please notify us immediately and delete it from your system. Please visit our website to read the full disclaimer: http://www.euroclear.com/site/public/disclaimer
