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A research task was undertaken to evaluate the behavior of Ni Cad batteries under extreme temperature conditions. Identical tests were repeatedly performed in order to record the spread of terminal voltages and discharge capacity during (a) initial conditions, (b) after several charge/discharge cycles, and (c) under different temperature conditions. The test proved that significant degradation of...
This paper describes a technique for monitoring positive plate growth of normal production lead-acid cells without damaging the cell. The measurement is done in conjunction with a temperature-accelerated aging program. The method is based upon the use of a `reflectoscope', a sonar based instrument which can externally measure the distance between the end of each positive plate and the inside jar wall...
The most cost and energy effective building energy saving measure tried has been Wide Band Temperature Control and Operation with no refrigeration provided when room ambient temperatures are below 80F (27C), and with no heating provided above 65F (18C), on a year around basis. Between these limits, the building is operated in a dynamic or transient mode. In many locales this can eliminate the energy...
The development of digital telecommunications switching equipment with its lower power per Erlang of traffic and its more constant power requirement at a time of increasing energy shortage has created the need to re-consider conventional cooling practices and to examine other less conventional methods. This paper describes current telephone exchange cooling practices, the environmental requirements...
In the spring of 1978 the trade press carried a story about a small radio relay station in the North African desert titled "The Night Provides Coolness in the Heat of the Desert Sun". The sensational news was that, for the first time ever, electronic communication equipments housed in an insulated, 1, 3 m3 shelter were cooled by a cooling system that uses no energy and operates without pumps...
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