Apparatus and method for monitoring and controlling heating and/

Details Apparatus and method for monitoring and controlling heating and/ Apparatus and method for monitoring and controlling heating and/

1987-09-25

1990-02-27

Bennet, Henry A.

Heat exchange

With alarm, indicator, signal, register, recorder, test or...

236 91F, G05D 2300

Patent

active

049037595

ABSTRACT:
This invention relates to an apparatus and method for monitoring and controlling a heating and/or cooling system which controls the temperature of air in a conditioned space within a building and to such an apparatus and method capable of indicating the performance of such a system and effectuating control over the system for maximizing the operating efficiency of the system. As compared with a conventional control system, additional temperature sensors are provided to sense the temperatures of air drawn into and discharged from a temperature modifying unit such as an air handling unit having a heat exchange coil. The sensed temperatures are then used as a basis for determining the differential attained by flowing air through the unit, and compared with a desired differential taken as indicating an optimal condition, with the percentage of attainment of the optimal differential being visually displayed for an operator of the system. The attainment or non-attainment of certain target differentials within certain predetermined time intervals is used to control the operation of the system by either stopping such operation and draw attention to a clearly defective system or cycling the system to operate a satisfactory system in the most economical way. Application to systems other than circulating air systems is suggested.

REFERENCES:
patent: 3549088 (1970-12-01), Obenhaus
patent: 4055297 (1977-10-01), Lee

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