Core Insights - The article discusses the underground heating pipeline system, "Liao Heat into Jinan," which transports high-temperature water from Liaocheng to Jinan, ensuring efficient heating for urban residents [4][5][6]. Group 1: Infrastructure and Technology - The heating pipeline, located three meters underground, has a diameter of 1.6 meters and carries water exceeding 100°C over a distance of approximately 100 kilometers [5]. - The system includes four relay pump stations that act as "energy supply stations," ensuring the hot water maintains its energy and speed during transit [5][6]. - Advanced insulation materials are used in the pipeline to minimize heat loss, allowing the hot water to travel long distances with almost no thermal energy loss [6]. Group 2: Heat Transfer Mechanism - At the Huashan Energy Station in Jinan, high-pressure hot water from the long-distance pipeline is safely transferred to the city's lower-pressure heating system using plate heat exchangers, which allow for heat transfer without direct contact [7][8]. - The system operates with three independent water networks: the long-distance pipeline (0 network), the city’s primary network (first network), and the secondary network, ensuring pressure compatibility and efficient heat transfer [8][9]. Group 3: Efficiency and Environmental Impact - The "large temperature difference transformation technology" enhances heat exchange efficiency, allowing for greater heat extraction from the long-distance water [9]. - The project converts waste heat from the Liaocheng Xinyuan Power Plant into a clean urban heat source, reducing emissions and improving energy efficiency compared to smaller coal-fired boilers [11]. - The initiative aligns with environmental goals, demonstrating a successful model for sustainable urban heating and contributing to the green development strategy in Shandong [11].