Suitability of renewable energy heating sources for residential buildings in Tibetan area of western Sichuan

By analysing the balance between solar heat collection and building heating consumption in the Tibetan area of western Sichuan, taking the solar heating guarantee rate of 20%, 50%, 100% as the basis for the division of heating energy, divides the appropriate heating range of solar energy, air-source heat pump and other renewable energy sources in Tibetan area of western Sichuan. Obtains four zones: zone I (solar system), zone II (air-source heat pump assisted solar system), zone III (solar-assisted air-source heat pump system), and zone IV (other renewable energy assisted air-source heat pump system), and proposes a choose-the-best diagram of the renewable energy heating mode for residential buildings. Analyses six selected regions in Tibetan area of western Sichuan. At the building to collector area ratio of 3.0, obtains the heating energy forms and applicable conditions of six regions according to the building heat index and the choose-the-best diagram.