The invention discloses an energy-saving
heat pump and a co-generation coupled
heating system and a coupled heating method, belonging to the field of energy sources. The
system is composed of a
steam turbine, a steam-
turbine condensing
plant, steam-
turbine circulation cooling equipment, a steam-
absorption heat pump, a heat network heater, a coupler, a heat-exchange
station, corresponding pipelines and accessory equipment. The
system utilizes the
heat pump and the co-generation heat network heater to heat circulating water of a heat network, the
heat pump uses circulating cooling water of a generating
plant as a low-temperature heat source, the extracted steam of the
steam turbine is utilized as a driving heat source, and the heat of the circulating cooling water is extracted to heat the circulating water of the heat network. The water yield and temperature of water from the heat pump and water from the heat network heater are distributed and adjusted through the coupler, and the
heating temperature and the rate of flow in a full
heating season are qualified. According to the method, a peak heater is cancelled, so the occupied area and the investment are reduced. The heat pump can have basic
heat load, the residual heat is extracted to the maximum extent, the heating capacity is increased, the economical efficiency of the heat pump is maximized, and the purposes of energy saving and emission reduction are achieved.