A solar centralized hot water system with heat storage function

Abstract

The invention discloses a solar central water heating system with a heat accumulation function, which comprises a solar thermal collector array, a water tank, a collector circulating pump, a check valve, an electromagnetic valve and other parts. A heat accumulator filled with phase-change heat accumulation medium is arranged on the bottom in the water tank, and the interior of a heat accumulator core tube is a water passage. A heat accumulator water passage inlet is connected with the outlet of the solar thermal collector array, a heat accumulator outlet is directly open in the hot water storage tank, and the inlet of the solar thermal collector array is connected with the bottom of the hot water storage tank sequentially through the check valve and the collector circulating pump and connected with a tap water supply pipeline through the water-lifting electromagnetic valve. Both hot water heated by the solar thermal collectors and cold water replenished into the water tank first flow through the heat accumulator core tube and exchange heat with the heat accumulator. When the water temperature in the water tank is higher or lower than the phase change temperature of the heat accumulation medium in the heat accumulator, heat is released to the heat accumulator or heat is absorbed from the heat accumulator. By means of the heat absorption and release of the heat accumulator, energy consumption can be reduced, and solar radiation energy can be effectively utilized by the way of peak load shifting.

Description

technical field [0001] The invention relates to the field of centralized production and supply of domestic hot water by using solar energy, in particular to a solar centralized hot water system with heat storage function and its optimized working method. Background technique [0002] With the decline of traditional fossil energy such as oil, coal, and natural gas, and the increasingly serious environmental problems caused by the use of these fossil energy, the development of various clean energy and renewable energy utilization technologies has received more and more attention. Among them, the use of large-scale solar heat collectors on buildings to centrally supply domestic hot water to buildings is an effective means of utilizing renewable energy and has excellent environmental performance. With the adjustment of urban energy structure and the characteristics of urban buildings developing towards middle and high-rise buildings, the application of engineering-scale solar co...

Images