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Early application is the most widely used solar water heating, millions around the world now have solar heater installations. The main components of solar water heating systems, including collectors, storage and recycling pipeline of three parts. In addition, there may be auxiliary energy devices (such asElectric heatingEtc.) to supply no sunshine when used, may have forced yet another cycle of water used to control the water level or temperature control of electric or part of the load devices and piping, etc. received. Solar hot water system by way of circulation can be divided into two types:
1, natural circulation type:
Such types of storage tanks placed above the collector. Receive water in the collector heating solar radiation, temperature rise, causing the collector and storage tank water temperature difference in the density difference, which led to buoyancy, this is like a heat siphon to promote water tank and the collector in addition to the natural flow . By the poor relationship with the density, water flow in the collector is proportional to the amount of solar energy absorption. Because without this type of recycled water, maintenance is very simple, it has been widely adopted.
2, forced circulation type:
Hot water system water to the water between the collector and the tank cycle. When the collector tank top than the bottom temperature of the water temperature several degrees, the control unit will start the flow of water to the water. Water valve to prevent the entrance of the night with water from the collector currents, and cause heat loss. Types of water systems by such traffic can be learned (as known from the flow of water), predictable performance, can be calculated in heating water for some time. Under the same design as its more natural circulation mode with a high temperature strengths available, but must make use of its water, so there is water power, maintenance (such as water leakage, etc.) and the control device when stopped moving, easy to damage the water and other problems. Therefore, in addition to large-scale high temperature hot water system or in need of the situation, before choosing forced circulation type, generally most of heaters with natural circulation.
Author: Haining City, New Energy Technology Co., Ltd. Sang Chao
website: www.sunsurf.com.cn
main product: solar heater、solar energy
