A hydrothermal system for residential units

摘要

A heating system comprises a central hot water generator 10 which circulates hot or cold water through primary pipes 14 to residential units 16, the primary pipes 14 comprising delivery pipe 18 and return pipe 20. The residential units 16 comprise a plurality of utilities 22 including a thermal utility 24. Secondary pipes 14 are in fluid communication with primary pipes 14 with secondary delivery pipe 18 supplying utilities 22 and secondary return pipe 20 conveying water from thermal utility 24 to primary return pipe 20. A hydraulic interface unit 30 is in fluid communication with secondary pipes 14 and comprises electronic control unit 34. The electronic control unit 34 controls motor-operated modulating valve 36 according to signals from ambient temperature detector 29 and flow measurement means 38 which measures flow in either the secondary delivery 18 or return 20 pipes. There may be at least one primary pipe for cold water 19 in fluid communication with at least one secondary cold water pipe 19 and an external water supply network or a domestic utility.