Solar composite heat source hot water system and control method thereof

Abstract

The invention discloses a solar composite heat source hot water system, and relates to the field of hot water supply systems. The system comprises a solar heat collector, an auxiliary heat source, a heat supply water tank, a heat storage water tank and a control device; the solar heat collector and the auxiliary heat source are connected with the heat supply water tank through a pipeline, the heat supply water tank is connected with a heat exchanger in the heat storage water tank, the control device is connected with valves and control pumps on pipelines, and through meteorological forecasting data and water using amount forecasting data, opening and closing instructions are sent to the valves and / or control valves; on the basis of not additionally arranging or modifying equipment configuration, and not changing the user hot water using habits, hot water is provided for a user ceaselessly for 24 hours; the system and the control method can ensure the proportion of solar energy in the whole system to the maximum extent, the system efficiency is improved, the hot water output cost is reduced, the redundant hot water amount in the water storage tank can be reduced to the great extent, and energy losses caused by hot water cooling is avoided.

Description

technical field [0001] The invention relates to a hot water supply system, in particular to a solar composite heat source hot water system and a control method thereof. Background technique [0002] Solar water heater is a device that uses solar energy to heat and produce hot water. It has the advantages of economy, energy saving, and environmental protection. It is widely used in the production of hot water for daily bathing. However, because solar energy is greatly affected by the weather, when the light intensity is insufficient, the heat supply is insufficient. Therefore, a composite heat source hot water system in which solar water heaters are often combined with hot water boilers has been developed. When the solar energy is insufficient, the heat is supplemented by other heat sources to meet the hot water demand of users. [0003] In order to facilitate the settlement and charging of expenses, during the operation of the system, a large amount of user water consumptio...

AI Technical Summary

Problems solved by technology

[0007] To sum up, there are usually the following problems in current hot water systems with solar energy composite heat sources: First, because the amount of solar radiation is closely related to time, the highest at noon and the lowest in the morning and evening, and there is a delay in heating, the hot water system usually needs to wait for a day In the sun, hot water at a suitable temperature can only be provided in the afternoon or even at night, and the 24-hour hot water demand of users cannot be guaranteed; second, some systems adopt a heating strategy of simultaneously turning on solar energy and auxiliary heat sources to meet the 24-hour hot water demand of users , but at this time the proportion of solar energy in the system is low, most of the hot water is heated by electricity or gas, the system efficiency is low, and the output cost of hot water is increased; third, the control of the traditional composite heat source hot water system The strategy uses the fixed water level set by the user as the basis for judging whether to produce hot water. When the water in the water tank is lower than the set value, the heating device is turned on to produce hot water. Due to the fluctuation of daily water demand, this setting is easy to cause A large amount of excess hot water is in the tank, and the cooling of excess hot water will cause energy loss

Images