Abstract
This paper presents the results of analysis of energy and economic efficiency of the hierarchical gas-gas engine, with a note that a trigeneration system was analyzed, in which the production of electricity, heat and cold are combined. This solution significantly increases the energy efficiency of the gas and gas system compared to a system without cold production. The analysis includes a system comprising a compressor chiller which is driven by an electric motor in the system, as well as a system applying the mechanical work that is carried out via a rotating shaft of rotor-based machines, i.e., a gas turbine and a turboexpander. The comfort of the regulation of the refrigerating power rather promotes the use of a solution including an electric motor. Analysis contains also a schematic diagram of the system with a absorption chiller, which is driven by low-temperature enthalpy of exhaust gases extracted from a hierarchical gas-gas engine. Application of turboexpander with heat regeneration in the trigeneration system is also analyzed. Based on the multi-variant economic and thermodynamic calculations, the most favorable system variant was determined using, among others, the specific cost of cold production.
Highlights
In view of the growing demand for electricity, it is important to use effective energy systems.Separate electricity and heat generation is energy inefficient because it requires more fuel to be consumed than when produced simultaneously
This paper presents the results of analysis of energy and economic efficiency of the above hierarchical gas-gas engine, with a note that a trigeneration system was analyzed, in which the production of electricity, heat and cold are combined, Figures 1–3
A necessary is important to to establish an an answer to theinquestion regarding the economic of the conditionItfor this needs involve increase the revenue gained from thefeasibility sale of additional gas-gas system with a turboexpander with a regenerative heat exchanger side by side with the electricity generated in the turboexpander, as well as the cold production in the gas-gas system conclusion concerning its mere better parameters from a thermodynamic point of view
Summary
In view of the growing demand for electricity, it is important to use effective energy systems. The energy and economic efficiency of two alternatives involving an innovative, hierarchical two-cycle gas-gas engine operation were analyzed in [1] In this design, two Joule circulations were combined and implemented, i.e., a high-temperature Joule cycle of a gas turbine and a low-temperature. Energies 2020, 13, 1006 the Joule and Clausius–Rankine through a gas-steam-water system in a heat recovery steam generator, which uses a low-temperature enthalpy of exhaust gases extracted from a gas turbine to produce steam to feed the steam turbine [2]. The temperature of the gas extracted from the heat-recovery steam generator and released the environment, both for the combined cycle and the purely condensing operation of the gas-steam system, is low all year, as it is in the range from 70 to 90 ◦ C, whereas in the gas-gas system the temperature of the exhaust gas to the environment is relatively high. Schematic diagram a system including compressor chillerlocated locatedon onaacommon common shaft shaft with
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
