English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In the Arctic, submarines and equipment in the near future will carry out transport operations with overcoming ice fields underwater, as well as exploration, construction and operation of underwater objects. It is possible to use gas turbine plants in a single-circuit version, which operate on hydrocarbon fuel, as closed ones for underwater equipment. The oxidizing agent is usually oxygen. The working fluid of closed gas turbine plants (CGTP) is a mixture of combustion products of hydrocarbon fuel and oxygen. Studies of the thermodynamic cycle characteristics of CGTP with oxygen as an oxidizer with various initial data have shown the possibility of operating micro-gas turbine plants at nominal conditions with acceptable efficiency in engines with heat recovery. Higher efficiency indicators are obtained in CGTP with a turbocompressor utilizer (TCU) and a heat regenerator. However, power plants of underwater equipment are often operated at partial loads under various types of loads associated with their purpose. When determining characteristics in variable modes, the nominal parameters are the initial data. For СGTP with TCU and heat recovery (R), the efficiency is relatively 15 ... 20% higher than for СGTP with R, and the specific power is 1.5 times higher. Investigation of the СGTP characteristics at partial loads is carried out under generator and screw loading, which are typical for underwater equipment. It has been established that СGTP with TCU and R at all loading modes have higher efficiency than СGTP with R. СGTP at partial loads with a screw type of loading are more economical than at variable generator loads. CGTP can produce mechanical and thermal energy, ensuring high energy efficiency of the plant in a submerged position.

vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s. o. makarova/vestnik gosudarstvennogo universiteta morskogo i rečnogo flota imeni admirala s.o. makarova

OPERATION AT VARIABLE MODES OF CLOSED MICRO-GAS TURBINE PLANTS WITH OXIDIZER-OXYGEN FOR UNDERWATER EQUIPMENT