Abstract: A fluid substance which is heated or cooled and then transported has associated with it a well-defined transfer of thermal energy. The present invention relates to means of measuring and registering the accumulated quantity of this transfer of thermal energy associated with a moving fluid which experiences a change in temperature.

Abstract: The system controls the operation of one or more interruptable electrical loads to maintain the total electrical power demand during a demand interval within certain predetermined limits. The demand forecaster makes periodic projections of the metered demand to the end of the demand interval based upon the current rate of energy consumption (instantaneous demand) and the accumulated energy consumption during the demand interval. If the projected value indicates that a demand peak will occur, the system signals a "shed" condition for the load thereby interrupting the load to prevent the occurrence of the peak. Conversely, if the system detects a projected low value of the demand, a "restore" condition exists whereby the load is turned on to take advantage of the available electrical capacity. The system comprises a pair of loadable up/down counters, and an accumulator, which may consist of a two-port multiplexer, a full adder and associated data latch.