In a simple motion, pressing the switch activates a system that channels river water into the building, transforming the indoor climate—keeping it warm in winter and cool in summer. This innovative approach, inspired by the 2006 "City's New Energy Source Heat Pump Technology Symposium" on May 30th, will see the implementation of "water-air-conditioning" in Chongqing this year. By next year, public buildings are expected to adopt this technology, potentially cutting air conditioning costs by 25%. By 2020, approximately 15% of the city’s buildings are projected to use this method.
Xu Yongguang, director of the City Building Technology Development Center, revealed that surface water is being prioritized as a new energy source. Unlike groundwater, solar or wind energy, Chongqing is focusing on surface water, particularly the Liangjiang River and its tributaries, to power water source heat pump systems. These systems take advantage of the stable temperature of river water (around 22°C) and use heat pumps to provide heating in winter and cooling in summer. With two major rivers and over ten smaller ones, Chongqing has one of the richest water resources in the country, making it an ideal location for this sustainable technology.
Currently, only 50% of energy efficiency standards are met in certain areas like Beibei, while 95% of buildings are considered high-energy consumers. As part of the second phase of the National New Energy Development Demonstration Cities program, Chongqing has selected two pilot projects: the Nanan District Hotel and the Science and Technology Entrepreneurship Development Center. This year, 150,000 square meters of buildings will be equipped with "water-air-conditioning" systems.
The city plans to implement this technology in three stages: demonstration, industrialization, and large-scale promotion. Although using heat pump technology may add some initial cost to construction, the benefits are significant. Not only does it improve indoor comfort, but it also reduces air conditioning expenses by up to 25%, offering long-term savings for residents and businesses alike. This shift represents a meaningful step toward a more sustainable and energy-efficient future for Chongqing.
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