**Abstract:**
China is rich in seawater resources, and the seawater source heat pump represents an innovative technology within the broader category of water source heat pumps. This system can be applied to various heat sources with different qualities, such as groundwater, seawater, and urban wastewater. Currently, domestic innovations in this field provide efficient heating, cooling, and temperature control for large-scale buildings at low investment costs, minimal pollution, and easy management. These technologies not only reflect the economic value of modern high-tech achievements but also contribute significantly to sustainable social development and progress.
**Keywords:** Seawater source heat pump; heat exchanger; corrosion-resistant materials; energy efficiency; water source heat pump.
A seawater source heat pump refers to a system that uses seawater as a heat source or sink, with specialized heat exchangers designed to withstand the corrosive nature of seawater. Unlike traditional heat pumps that may use other types of water sources, the key difference lies in the materials used for the evaporator and condenser—typically more durable and resistant to corrosion. The concept of "water source heat pump" includes any system that uses water as a thermal medium, whether it's seawater, river water, or wastewater. As long as the system prevents freezing during normal operation, it can effectively provide heating or cooling with higher energy efficiency compared to air-source heat pumps.
Although heat pump technology has been around for decades, its adoption in China was initially influenced by foreign technologies. However, this trend is gradually changing. Domestic manufacturers are now developing advanced heat pump systems that match or exceed international standards. These systems are not only cost-effective but also environmentally friendly, making them ideal for large-scale applications in commercial and industrial settings.
Heat pumps are a promising energy-saving technology that utilizes natural thermal energy from low-temperature sources like groundwater, seawater, soil, and industrial waste heat. By converting and transferring this heat, they provide efficient heating and cooling solutions. Continuous innovation in heat pump technology has led to improved efficiency, higher heating temperatures, and better performance across a wide range of applications.
There is a common misconception that heat pumps have limited capacity and cannot support district heating or cooling. However, with recent advancements in large-scale heat pump systems, this is no longer the case. Domestic companies have made significant breakthroughs in producing large and ultra-large heat pump units that are suitable for centralized heating and cooling systems. These systems offer high water utilization rates, increased heating output, and flexibility in handling different water sources.
For example, the "Water Source Continuous Heat Pump Air Conditioner" and the "Secondary Condensing Heat Pump Air Conditioner" are two innovative products that demonstrate superior performance, energy efficiency, and adaptability. They can operate efficiently with various water sources, including seawater, rivers, lakes, and industrial wastewater, and are ideal for large-scale heating and cooling needs.
These systems can recover and utilize heat up to 95% efficiently, save over 35% of water, reduce overall investment by more than 10%, and convert waste heat into clean energy. They are suitable for a wide range of building types and industrial environments, and can supply heat according to different temperature requirements, enabling precise and efficient heat distribution.
In summary, China has made significant progress in heat pump technology, with domestically developed systems offering competitive performance, high energy efficiency, and environmental benefits. These systems are simple in design, stable in operation, and adaptable to various installation conditions, making them ideal for both domestic and international seawater resource applications.
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