METHOD AND DEVICE FOR OPERATING HEAT AND WATER SUPPLY SYSTEM Russian patent published in 1999 - IPC

FIELD: heat and water supply from geothermal sources located on sites where there are two or more geothermal beds. SUBSTANCE: proposed method for operating system using low-temperature geothermal sources of 5 to 40 C) involves following procedures: during certain period of day, say, at night, system functions include, along with supplying heat due to thermal transformation of fluid stream from underground manifold, also additional heating of other portion of fluid extracted from this manifold to temperature higher than that in manifold by thermal transformation of geothermal fluid stream of lower temperature tapped for water supply from additional geothermal source. Additionally heated fluid is supplied to storage tank and during other period of day it is pumped from storage tank to source manifold at the same time taking off heat from fluid including that for additional heating of fluid from other manifold to temperature required for hot- water supply. Recirculating heating-pumping cycles are used for thermal transformation of geothermal fluid stream to supply heat during first period of the day, to additionally heat fluid, and to do so when temperature in main manifold is lower than 20 C so as to take heat off fluid during second period of day. EFFECT: improved economic efficiency and reliability when using low-temperature geothermal sources. 7 cl, 3 dwg