Hot water supply system and method thereof

Abstract

The invention relates to a hot water supply system and a method thereof. The hot water supply system comprises a main water supply pipeline used for providing water sources, a heat transfer subsystem used for conducting heat transfer between hot-source water and heated water and causing the heat quantity of the hot-source water to transfer to the heated water; and the hot-source water and the heated water come from the main water supply pipeline. The hot water supply method comprises the following steps: tap water of the same water source is divided into the hot-source water and the heated water; and heat transfer is carried out. The heat quantity of the hot-source water is transferred to the heated water by a vapor compression heat pump circulating subsystem to increase the temperature of the heated water. The hot water supply system and the method thereof carry out water diversion to the water supply system and heat transfer to the divided water so as to be capable of effectively utilizing the large amount of heat existing in the water supply system, thereby greatly improving the energy efficiency of the hot water supply system, having obvious advantages of cleanness and high efficiency and being beneficial to the reasonable utilization of energy.

Description

technical field [0001] The invention relates to a hot water supply system and method, in particular to a hot water supply system and method for providing hot water by dividing the water supply system and performing heat transfer. Background technique [0002] In the urban water supply system, the water that has been treated by the water plant and reaches the standard is usually sent to the water use unit through the water supply pipeline, such as a living quarter, a water use factory or a water garden unit, etc. Reach each household or other water terminals. In the above-mentioned water supply system, the temperature of the tap water sent to the water terminal is usually above 10 degrees Celsius. Even in winter in the north, the temperature will not be lower than 5 degrees Celsius due to the antifreeze measures taken for water pipes. As far as general water consumption is concerned, in most cases, users are not sensitive to the temperature of tap water. For example, in wint...

AI Technical Summary

Problems solved by technology

However, the heat supply coefficient (COP), that is, the energy efficiency of the hot water supply system of the vapor compression heat pump cycle technology is greatly affected by the operating temperature of the evaporator, that is, the temperature of the heat source, and the operating temperature of the condenser, that is, the temperature of the hot water.

For air source heat pumps, as the temperature drops in winter, the operating temperature of the evaporator of the heat pump cycle will drop, which will cause the COP of the heat pump system, that is, the energy efficiency to decrease.

[0006] In addition, the compressor of the existing vapor compression heat pump cycle technology is driven by grid electricity, so its primary energy efficiency is also restricted by the power generation efficiency of the grid user end

When the compressor adopts frequency modulation control, since the AC power of the grid needs to be rectified into DC power, there will be rectification loss

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