Regulation method and device for reducing return water temperature of heating system

Abstract

The invention relates to a regulation method and device for reducing the return water temperature of a heating system. The device comprises a room temperature on-off control valve, a room temperature controller and a return water temperature monitoring sensor which are respectively arranged in each house. The regulation method includes the steps: 1) arranging the room temperature on-off control valve at an inlet of a water supply branch pipeline of each house, arranging the room temperature controller indoors and arranging the return water temperature monitoring sensor at a position of each return water branch pipeline before entering a main return water pipeline; 2) setting indoor temperature through the room temperature controller by a user; 3) transmitting measured indoor temperature signals and indoor temperature signals set by the user to the room temperature on-off control valve by the room temperature controller, and transmitting measured return water temperature signals to the room temperature on-off control valve by the return water temperature monitoring sensor; 4) controlling the on-off period of the room temperature on-off control valve: 4.1) determining on time according to the return water temperature; 4.2) adjusting the duration of a next on-off period according to room temperature deviation of the current on-off period and indoor temperature change rate.

Description

technical field [0001] The invention relates to the field of HVAC systems, in particular to a control method and device for reducing the return water temperature of a heating system. Background technique [0002] For heating in winter, the existing indoor terminal heat exchange equipment is mostly radiators, concrete radiant floors, etc. At present, the temperature of the primary side of the thermal power plant of the central heating system is 80-110 °C, and the secondary side of the heat exchange station supplies the building with 50-60 °C. Lowering the temperature of the return water will help reduce the energy consumption of transmission and distribution, and improve the energy utilization efficiency of the heat source side. Compared with the traditional mode of continuously supplying indoor heat by mixing hot water and return water in the heat exchange station, on-off control and regulation combined with radiant floors and radiators can effectively reduce the return wate...

AI Technical Summary

Problems solved by technology

For the traditional on-off adjustment method, the water flow time in a 30-minute cycle is too long, which is much longer than the time required for water replacement in the indoor radiator and the concrete radiant end; although the traditional on-off adjustment method can achieve a good control effect on the indoor temperature , but due to the long time of passing water, the return water temperature at the end is at a relatively high temperature level, resulting in waste of high-temperature heat sources

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