GB459494A - Improvements in or relating to hot water heating systems - Google Patents

Abstract

459,494. Heating by circulation of fluids. RUTHSACCUMULATOR AKTIEBOLAGET, 1A, Eriksbergsgatan, Stockholm. Aug. 4, 1936, No. 21470. Convention date, Aug. 3, 1935. [Class 64 (ii)] Steam tapped from a turbine 3, Fig. 1, passes into a preheater 5 forming the upper part of a heat accumulator 6. Hot water is drawn from the upper part of the accumulator 6 by a pump 7, which delivers it to heat consumers, and the return pipe 9 is connected through a throttling device 11 to the bottom of the accumulator 6. Cold water is drawn from the accumulator 6 by a pump 12, and forced through pipe 13, and regulating valve 14 to preheater 5. The return water may pass direct to the preheater by a byepass 15. The temperature of the hot water in pipe 8 is regulated by an admixture of cold water through pipe 16 and valve 17. The valves 11, 14 are controlled by the steam pressure in pipe 2. When the return water is just sufficient to condense the steam in preheater 5, valve 11 is closed and valve 14 open. If the steam consumption of the turbine rises, pressure in pipe 2 falls, valve 14 is partly closed and valve 11 partly opened. Less return water then flows to the preheater, and more to the accumulator 6. If the steam consumption of the turbine falls, pressure in pipe 2 rises, valve 11 is partly closed, and valve 14 partly opened. If the return water is insufficient for the requirements of the preheater 5, extra water is taken by pump 12 from the lower part of the accumulator. In a modification, Fig. 2, water is supplied by a heater 21 to a flow pipe 22, and accumulator 23. Valves 26, 32 are controlled by the temperature of the hot water supplied by the boiler. When the plant is in equilibrium, valves 26, 32 are closed, and all return water from pump 30 passes into the boiler. If the hot water consumption increases, flow through the boiler increases, temperature of the hot water decreases, and valve 26 is opened so that return water may enter the accumulator and hot water may be forced out at the top into the pipe 22. When the temperature of the boiler rises, valve 26 closes and 32 opens, so that cold water from the accumulator also passes back to the boiler.