Document Type and Number:
Japanese Patent JPS4991489
Kind Code:
A
Abstract:
The enthalpy calculating device includes a function generator which receives two signals, one representative of either the temperature or pressure property of the steam and the other representative of the enthalpy of the steam for the particular state of the steam. The function generator then emits an output signal corresponding to the other of the temperature or pressure property of the steam. The device also has a controller means composed of a comparator and integrator or an integral action controller. This latter means receives the output of the function generator and compares it with the actual value of the "other" property of the monitored steam. If there is a difference, the output of the controller means is corrected accordingly. This output serves not only as one of the input signals to the function generator but also as the output signal of the device to control the flow of feed water.
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Application Number:
JP14176773A
Publication Date:
August 31, 1974
Filing Date:
December 18, 1973
Export Citation:
International Classes:
G01K17/00; F22B35/10; G01K17/06; G01N25/60; G06G7/56; (IPC1-7): G06G7/12