Using WWW to Inform about CERN Energy Consumption

H. Laeger and S. Lechner

CERN electrical energy consumption and related cost are of concern for several reasons, not the least their impact on the budget. It is believed that the availability of information on the consumption and the cost of distinct sectors to those who can influence them i.e. a large number of the CERN population, will stimulate individual initiatives for reductions in consumption and cost.

A method has been developed whereby logged data is retrieved from a database and presented in comprehensible histograms. Data can be viewed either as variations over standard periods (day, week, month) are as integration over standard periods. Specific solutions have been devised for rapid response time, as well as for generic scaling with optimal resolutions for data which may vary over several orders of magnitude. Access to global data is only available for the management and is password protected, whereas access to all the distinct sectors of consumer is granted to everybody on the CERN site. The implementation is done using hypertext technique and a WWW server.

This paper describes the main graphical tool, the concept of data preparation for instant reply, implemented reliability procedures and some initial experience with its use.