LOCAL HEAT SUPPLY SYSTEM

PROBLEM TO BE SOLVED: To expand a degree of freedom of a supply ratio of main heat supply plant and sub-heat supply plant in partial load and low load in a related operation. SOLUTION: In this local heat supply system, heat supply plants 21, 22 are respectively provided with differential pressure control valves 28, 33 on bypass pipes 27, 32 connecting upstream-side pipes 25, 30 and downstream-side pipes 26, 31 of force feed pumps 24, 29, local heat circulating facilities 23 are provided with pressure difference detecting facilities 36, 38 for detecting pressure difference between a going-way system 34 and a returning-way system 35 in each of consumer facilities X, Y, and openings of the pressure difference control valves 28, 33 can be controlled so that the pressure difference detected in the consumer of the smallest pressure difference is used as compensation pressure difference necessary for supplying a heat medium of a desired flow rate to the consumer facilities. COPYRIGHT: (C)2007,JPO&INPIT