METHOD OF CONTROL OF PLENUM VENTILATION PLANT WITH SWITCH TO MODE OF COST-EFFECTIVE HEAT CONSUMPTION Russian patent published in 2013 - IPC F24F7/00 

FIELD: power engineering.

SUBSTANCE: invention relates to the field of heat supply of plenum ventilation plants (VP) with water heating. A plenum plant VP comprises a fan, a heat exchanger with supply (ST) and drain (DT) coolant pipelines, connected, accordingly, to supply (SM) and return (RM) manifolds of the heating network, a control valve with a drive installed on the ST, an additional linking pipeline. The first end of the additional linking pipeline is connected to the RM upstream the point of connection of the heat exchanger DT along with the coolant flow. The second end of the additional linking pipeline is connected to the ST to the heat exchanger after the control valve along with the coolant movement to the heat exchanger. On the additional linking pipeline there is a check valve. In the RM between the place of connection of the first end of the additional linking pipeline and the DT from the heat exchanger, and also in the ST upstream the control valve along with the coolant movement towards the heat exchanger and downstream the place of connection of the additional linking pipeline along with coolant movement there are throttling devices. The VP control system comprises sensors of external and plenum air and coolant temperature, a metre-regulator (a controller).

EFFECT: reduced coolant flow from a SM in duty mode of VP operation and reduction of operational costs.

1 cl, 1 dwg