Published in Thermal Engineering
AbstractTaking into account new problems arising in the transportation of a steam-water heat carrier to support operation of geothermal power plants (GeoPP), a procedure is outlined for determining the void fraction considering the gravity component of the pressure drop in the hydraulic design calculations of steam-water piping. Unavailability of d...
Published in Thermal Engineering
AbstractEconomic aspects of implementing coal gasification technology are considered. Many objective causes hindering the comparison of economic characteristics of the considered coal gasification technologies are outlined. The energy and economic efficiencies of producing synthesis gas (syngas) from coal are estimated. The factors having the most ...
Published in Thermal Engineering
AbstractIn this paper, methods for removing corrosion product deposits from the primary circuit of light-water reactors with pressurized coolant under transient operating conditions are considered. The analysis of these methods, which are successfully used in the main types of light-water reactors, such as PWRs, VVERs, and nuclear marine propulsion...
Published in Thermal Engineering
Abstract—The article considers three implementation versions of controllers operating with constant speed actuators that are used in automation systems of a technological process: with a relay-pulse control unit (RPCU) with a lagging feedback and topping differentiator (a real differentiating element, RD), with calculating the output according to a...
Published in Thermal Engineering
AbstractSome rows of steam and gas turbines, with the exception of the first vanes, operate at the inlet flow conditions created by the upstream turbine stages. In particular, the conditions of the flow at the inlet of a low-pressure turbine vanes (LPT vanes) depend on the upstream high-pressure turbine (HPT). The first stages of the gas turbines a...
Published in Thermal Engineering
AbstractIn modern realities, developing the centralized heat-supply system in Russia is associated with a constant search for reserves for saving heat energy, its rational use, and a constant increase in the reliability and energy efficiency of heat supply to consumers. The solution to the problem of increasing the reliability of the operation of h...
Published in Thermal Engineering
Abstract—The quality of steam produced by boilers is strictly standardized and must be maintained whatever the quality of makeup water and whatever the composition of the boiler unit’s thermal cycle equipment. Under the conditions of constantly improved instruments for chemical monitoring, it becomes possible to develop measurement systems using wh...
Published in Thermal Engineering
AbstractApplication of antiscalants is a worldwide practice for industrial scale formation mitigation. The range of reagents is constantly expanding, and new scale inhibitors are permanently elaborated, including biodegradable ones. An antiscalant-driven scale inhibition theory has formed in the mid-twentieth century, and is up to date with some mi...
Published in Thermal Engineering
AbstractRequirements for improving the reliability, safety, and efficiency of nuclear power plants, as well as increasing the service life of the main NPP equipment up to 60 years, leads to the need to introduce new and improve existing technologies for maintaining water-chemical regimes. One of the directions of such improvement is the decommissio...
Published in Thermal Engineering
AbstractBased on the analysis of experiments carried out on simulators of fuel elements with a cladding of low-melting metals, models of melting and movement of the melt over the surface of fuel elements are proposed. The presented work is a continuation of experimental and theoretical work carried out jointly at the Nuclear Safety Institute, Russi...
