Heating systems – Automatic control – Water
Patent
1985-12-20
1987-11-24
Bennet, Henry A.
Heating systems
Automatic control
Water
236 91F, F24D 300, F24D 1910
Patent
active
047082879
ABSTRACT:
Apparatus for adjusting a central heating installation, particularly in respect of the heat delivery of the appertaining radiator or radiators separately, for which purpose the or each radiator is provided with a presettable valve in the supply pipe for the heating medium, such as water. The apparatus is further provided with a temperature transducer on the supply pipe and a temperature transducer on the return pipe for the heating medium, and a control unit is provided which has at least three inputs, to two of which said temperature transducers of the supply and return pipes are connected, while to the third said input a room temperature transducer is connected. Said control unit comprises a memory for storing the relationship between the relative heat delivery of the radiator and the relative mass flow of the heating medium, using as parameters the differences between supply, return and room temperatures and the heat delivery exponent of the radiator, and for storing input data, measured temperatures and calculated heat delivery, said control unit reacting to the measured temperatures to supply at the output a control signal for indication and/or valve adjustment of the mass flow in the flow pipe.
REFERENCES:
Caldwell et al., "Flow Balance in Hydronic Systems" Air Conditioning, Heating & Ventilating, pp. 71-98, Sep. 1965.
Bennet Henry A.
Nederlandse Centrale Organisatie voor Toegepast-Natuurwe-Tenscha
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