| 摘要 |
1,121,984. Regulating steam pressure in expansion vessels. COMMISSARIAT A L'ENERGIE ATOMIQUE. 9 Aug., 1966 [30 Sept., 1965], No. 35699/66. Heading F4A. [Also in Division G3] A pressurized water primary circuit of a power generating installation (not shown) is provided with a closed expansion vessel 1. When the power demanded from the installation decreases, the resultant increase in temperature of the water in the primary circuit causes it to expand along conduit 2 and enter the vessel 1 which contains steam and water phases maintained in equilibrium at a higher temperature than that of the water in the primary circuit, by controlled heat source 7. To obviate the pressure increase in the vessel 1 which would otherwise occur when the expansion water from conduit 2 enters it, part at least of this cooler water is passed through a heat exchanger 6 in the steam phase before being discharged into the vessel through orifice C, so cooling and condensing some of the steam. When the power demanded from the installation increases and the water in the primary circuit contracts, water passes from the vessel 1 to the primary circuit through orifice B, and non return valve 4. The resultant pressure drop of the steam in the vessel 1, is partly offset by evaporation of some of the hot water remaining in vessel 1, so reducing the pressure variation. |
