**Editor's Note:** To help readers better understand the latest energy-saving technologies and innovations, the City Energy-Saving Monitoring Technology Service Center has selected a range of products to introduce through our "Energy-Saving Products Live Show." This series will feature science reports that explain the scientific principles behind these technologies, along with details about upcoming exhibitors and product listings.
In recent years, heat pump water heaters have gained popularity due to their ability to recover low-temperature waste heat, offering significant energy-saving benefits that appeal to people of all ages.
As a new type of air-heating equipment, heat pump water heaters are highly efficient in producing hot water. Their energy consumption is only one-fourth that of traditional electric water heaters and one-third of fuel or gas-based systems. When used on a large scale, they can significantly reduce the overall demand for heating energy in communities.
For example, consider an average urban household that uses 200 liters of hot water at 60°C daily. If using an electric water heater (calculated based on a 40°C temperature rise), the daily electricity consumption would be approximately 11.6 kWh, costing around 5.3 yuan. Annually, this would amount to roughly 1,925 yuan. In contrast, an air-source heat pump water heater would consume about 2.6 kWh per day, costing around 1.53 yuan, resulting in an annual cost of approximately 550 yuan. This means a potential saving of at least 1,375 yuan per year compared to a traditional electric water heater.
A heat pump system consists of four main components: the compressor, condenser, expansion valve, and evaporator. Similar to a refrigerator, the heat pump uses the compressor to circulate refrigerant through the system, allowing it to continuously evaporate and condense. The refrigerant absorbs heat from the surrounding environment, which is then compressed into a high-temperature, high-pressure gas. This heat is transferred to the water via a heat exchanger, where it is released after passing through the expansion valve, returning the refrigerant to a low-temperature, low-pressure liquid state. This continuous cycle heats the water in the tank, which is then distributed through a circulation system to radiators for heating or directly used for hot water supply.
By adopting such advanced technology, households and communities can not only reduce their energy bills but also contribute to a more sustainable and eco-friendly future. Stay tuned for more updates on the latest energy-saving innovations.
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