1. Building Energy Research Center, Tsinghua University. 2008 Annual Report on China Building Energy Efficiency. Beijing: China Architecture & Building Press, 2008, 12 (in Chinese)
2. Danila N. Heat production in co-generation plants and its transport over large distances. Proceedings of the Symposium with International Participation on Energy Conservation and International Cooperation, Bucharest, Rumania, 1982, 89–96
3. Paskov P, Skol’nik K. The increase of efficiency of municipal systems for centralized heat supply. Teploenergetika, 1993, (12): 16–19 (in Russian)
4. Zsebik A. Heat exchanger connection in substations-a tool of decreasing return temperature in district heat networks. Energy Engineering, 2001, 98(5): 20–28
5. Gao Yan, Fu Lin. Comparison and selection of HVAC schemes applying recycling cooling water from power plants. Heating Ventilating & Air Conditioning, 2007, 37(1): 52–54 (in Chinese)