What is a Solar Hot Water Circulating Pump?

A solar hot water circulating pump is a key component in solar hot water systems, designed to facilitate the efficient circulation of hot water. There are two primary types: the AC solar hot water circulating pump and the DC solar hot water circulating pump. The DC solar hot water circulating pump stands out for its direct power supply mechanism. It utilizes a 12V/24V solar panel to power the pump directly, enabling seamless cold and hot water exchange. This not only simplifies the power supply process but also enhances the system's energy - efficiency, as it directly harnesses the renewable energy from the sun. Shenpeng Company has developed a range of DC solar hot water circulating pumps specifically tailored for solar panel - based circulation systems.

On the other hand, traditional solar hot water circulating pumps rely on 220V/110V power supplies to provide uninterrupted power for water circulation. While they have been in use for a long time, the DC - powered counterparts offer several advantages, especially in terms of energy conservation and adaptability to off - grid or low - power - consumption scenarios.

The new solar hot water system represents a significant advancement in hot water supply technology. In the face of the global energy crisis, this system offers a sustainable solution. It provides sufficient water for multi - point use, ensuring comfort in both family and commercial settings. Moreover, its energy - conservation features, such as harnessing solar energy, not only reduce the reliance on non - renewable energy sources but also contribute to lower energy bills. Safety is another highlight, as it eliminates the risks associated with high - voltage electrical components in traditional water - heating systems. Additionally, the system has outstanding economic and social benefits. It is cost - effective in the long run, with reduced energy costs, and promotes the use of clean energy, which is beneficial for the environment.

Working Principle of the Solar Hot Water System

The new solar water - heating system operates based on the principle of converting sunlight into thermal energy. The collector, a crucial part of the system, is designed to absorb sunlight. It contains special materials that can efficiently convert light energy into heat. Once the collector heats the water, the solar hot water circulating pump comes into play.

In a forced - circulation system, the collector, solar power station, water storage tank, and pipeline form an integrated circulation loop. During the day, as long as there is sunlight, the collector continuously generates hot water. The solar power station monitors the temperature difference between the collector outlet and the water storage tank. When this temperature difference reaches the pre - set value of the system, it signals the solar hot water circulating pump to start working. The pump then circulates the heated hot water from the collector to the water storage tank. This process causes the temperature of the water in the storage tank to rise steadily. When the water temperature in the storage tank equals the outlet temperature of the collector, indicating that the heat transfer is complete, the pump stops operating. This automatic control mechanism ensures efficient heat transfer and energy conservation.

SHENPENG Solar Hot Water Circulating Pump

1. Motor Features of Shenpeng Solar Hot Water Circulating Pump

Shenpeng's solar hot water circulating pumps are equipped with high - efficiency ECM brushless DC motors. This motor technology is chosen to meet the stringent requirements of customers for long - term performance and reliability. The brushless DC motor design eliminates the need for carbon brushes, which are prone to wear and tear in traditional motors. As a result, the lifespan of Shenpeng's solar hot water circulating pump can reach over 20,000 - 30,000 hours. This extended service life reduces the frequency of pump replacements, saving both time and money for users. The high - efficiency ECM technology also ensures smooth operation, low noise levels, and better energy utilization, making it an ideal choice for solar hot water systems.

2. Starting Power Advantages of Shenpeng Solar Hot Water Circulating Pump

One of the remarkable features of Shenpeng's solar hot water circulating pump is its ability to start at low voltage and low power. It can be initiated at a low voltage of 6V and a low power of 2W. This is particularly useful in the morning when sunlight is relatively weak. Even under such conditions, the pump can start normally and begin the hot - water circulation process. Moreover, it can reliably start after a long period of inactivity. In contrast, many common solar pumps on the market struggle to start at such low voltage and power levels. They may even burn out when attempting to start at low power, which can lead to system failures and additional costs for users.

3. Protection Functions of Shenpeng Solar Hot Water Circulating Pump

Overvoltage Protection

Shenpeng's solar hot water circulating pump is equipped with an overvoltage protection mechanism. In case of overvoltage situations, which can occur due to fluctuations in the solar panel output or electrical grid issues (in some hybrid systems), the pump automatically stops working. This protects the pump's internal components from potential damage caused by excessive voltage. Once the voltage drops below the safe level, the pump restarts automatically, ensuring continuous operation without manual intervention.

Locked Rotor Protection

Another essential protection feature is the locked rotor protection. If the rotor of the pump is blocked by debris or other foreign objects, the pump will automatically detect this situation and enter a protection mode, shutting down to prevent damage. Once the obstruction is removed, the pump can resume normal operation automatically. This feature not only safeguards the pump but also ensures the smooth operation of the entire solar hot water system.

Polarity Protection

Polarity protection is also a standard feature in Shenpeng's pumps. If the power polarity is reversed, the water pump simply does not work. However, this does not cause any irreparable damage to the pump. This is a significant advantage over many domestic - made pumps that may suffer serious damage in case of polarity reversal.

In the coming years, the central heating project is expected to become a major sales channel for solar - related products. Among them, the split solar water - heating system is likely to gain more popularity among consumers with higher economic incomes. This system offers greater flexibility in installation and operation. Shenpeng Electronics, with nearly 20 years of experience in providing micro - water pumps to the global market, has long - standing partnerships with renowned companies like Kohler, Siemens, Panasonic, and Huawei. These collaborations are a testament to the high quality and reliability of Shenpeng's products.