EFFECT OF IHX CONFIGURATION CONCERNING THE EFFECTIVENESS AND EFFICIENCY OF VHTR REACTOR COGENERATION
Ign. Djoko Irianto
Center For Reactor Technology and Nuclear Safety - BATAN
Kompleks Puspiptek Serpong, Tangerang Selatan
ABSTRACT
EFFECT OF IHX CONFIGURATION CONCERNING THE EFFECTIVENESS AND EFFICIENCY OF VHTR REACTOR COGENERATION. Very High Temperature Reactor (VHTR) is one of Generation IV reactors which is conceptually designed using cogeneration configuration for electric generation and for hydrogen production. VHTR employs a helium-coolant with operating pressure 7 MPa and 1000oC outlet temperature. The main energy conversion component in VHTR cogeneration is intermediate heat exchanger (IHX). Thermal energy passes the IHX from the reactor system to the cogeneration system for electric generation and for hydrogen production. The value of efficiency and effectiveness of the system make certain to the success of VHTR design. This paper describes the results of the analysis of IHX configuration effect concerning the effectiveness and efficiency of VHTR cogeneration system. There are three configuration systems analyzed: direct cycle with secondary heat exchanger (SHX), direct cycle without SHX, and indirect cycle. The results of the analysis show that the highest efficiency is given by the direct cycle with SHX and the IHX is set in parallel with PHX. Despite its low efficiency, the third configuration obtains the highest effectiveness. This configuration in which electricity is generated indirectly has possibility to be used for a compact system design.
Keywords : Cogeneration, VHTR, IHX
Published : Journal "Sigma Epsilon", Volume 13 Nomor 3, Agustus 2009
ENERGY CONVERSION SYSTEM MODELING BASED ON HTGR COGENERATION FOR ELECTRIC GENERATION AND HYDROGEN PRODUCTION
Ign. Djoko Irianto
Center For Reactor Technology and Nuclear Safety - BATAN
Kompleks Puspiptek Serpong, Tangerang Selatan
Email: igndjoko@batan.go.id
ABSTRACT
ENERGY CONVERSION SYSTEM MODELING BASED ON HTGR COGENERATION FOR ELECTRIC GENERATION AND HYDROGEN PRODUCTION. Very High Temperature Reactor (VHTR) is a high temperature gas-cooled reactor (HTGR) which be a one of Generation IV reactors which is conceptually designed employs a helium-coolant with operating pressure 7,0 MPa and 1000 oC outlet temperature. Conceptually, VHTR is designed using cogeneration configuration for electric generation and for hydrogen production. The thermal power of the reactor could be determined according to the requirement which will be build in Bangka Belitung Province is 600 MWth. In this research, energy conversion system modeling based on HTGR cogeneration has been done in direct and indirect cycle configuration. There are two configuration in the direct cycle, which divide of the IHX and turbine in parallel or serial. With assumption of a helium-coolant used in the both side of IHX, the optimal effectiveness IHX is 0.95. Based on the effectivenes of heat exchanger, the heat transfer rate has been calculated. The system efficiency calculated for the three configuration. In generally, the efficiency of direct cycle is higher than the other. The efficiency is about 50%. Despite its low efficiency, the indirect cycle configuration obtains the highest effectiveness.
Keywords: HTGR, energy conversion system, cogeneration, effectiveness, efficiency
Published : Proceeding "SEMINAR NASIONAL PENGEMBANGAN ENERGI NUKLIR III 2010", Cilegon, Banten, 24 Juni 2010.
ASSESSMENT OF THE PERFORMANCE OF INTERMEDIATE HEAT EXCHANGER ON VHTR REACTOR COGENERATION SYSTEM
Ign. Djoko Irianto
Center for Reactor Technology and Nuclear Safety � BATAN
Kompleks Puspiptek Serpong, Tangerang Selatan
ABSTRACT
ASSESSMENT OF THE PERFORMANCE OF INTERMEDIATE HEAT EXCHANGER ON VHTR REACTOR COGENERATION SYSTEM. Very High Temperature Reactor (VHTR) is one of Generation IV reactors which is conceptually designed using cogeneration configuration for electric generation and for hydrogen production. VHTR employs a helium-coolant with operating pressure 7 MPa and 1000oC outlet temperature. The main energy conversion component in VHTR cogeneration is intermediate heat exchanger (IHX). Thermal energy passes the IHX from the reactor system to the cogeneration system for electric generation and for hydrogen production. The success of VHTR design is affected by many factors, one of which is the performance of IHX. This paper describes the results of the assessment of IHX performance in VHTR cogeneration system. The performance of IHX is influenced by some parameters such as: effectiveness of IHX, efficiency of IHX, and the configuration of IHX in the cogeneration system. There are three configuration systems assessed: direct cycle with secondary heat exchanger (SHX), direct cycle without SHX, and indirect cycle. The assessment are performed by comparing the parameter of IHX performance in the three configuration systems. The results of the assessment show that the highest efficiency is given by the direct cycle with SHX and the IHX is set in parallel with PHX. Despite its low efficiency, the third configuration obtains the highest effectiveness. This configuration in which electricity is generated indirectly has possibility to be used for a compact system design.
Key words : VHTR cogeneration system, intermediate heat exchanger (IHX), IHX system configuration, IHX efficiency, IHX effectiveness
Published : Prosiding Seminar Nasional Ke-15 "TEKNOLOGI DAN KESELAMATAN PLTN SERTA FASILITAS NUKLIR", Surakarta, 17 Oktober 2009
LICENSE FOR HTR TYPE REACTOR
N.Nababan 1], Ign.Djoko Irianto 2], Yus Rusdian A 1]
1] Center for Multipurpose Reactor - BATAN
2] Center for Nuclear Technology Assessment - BATAN
ABSTRACT
LICENSE FOR HTR TYPE REACTOR. The reason for liking the idea of introducing the modular High Temperature Reactor (HTR) technology can be quite different reasons like e.g.: "economic reasons based on electricity production prices and advantages of co-generation", "strategic reasons based on independency of fossil fuels", "long term industrial strategy", "environmental reasons based on confidence in the safety of the HTR and on the strong reduction of CO2 emissions", or a combination of these aspect. The combination of a HTR with a gas turbine offers all features as a modern energy technology: safe, clean, and efficient. Licensability of a new reactor concept is more than just fulfilling a set of existing nuclear regulations and guidelines. An essential prerequisite for a satisfactory completion of a lincensing procedure for a new technology is : favorable climate in terms of a positive altitude of the general public, government and utilities. It may be expected that if, in a specific country, the idea of constructing and operating modular HTRs is attractive to those people who play a decisive role in the decision making, the modular HTR will be licensable as well.
Keywords : Modular, HTR, Co-generation, License,
Published : Proceeding "Seminar Ke-4 Reaktor Temperatur Tinggi dan Teknologi Nuklir", Jakarta, 15-16 February 1999, ISSN 0854-8803
PRELIMINARY STUDY ON HYDROGEN PRODUCTION PROCESS BY APPLYING VHTR REACTOR COGENERATION CONCEPT
Ign. Djoko Irianto
Center For Reactor Technology and Nuclear Safety - BATAN
Kompleks Puspiptek Serpong, Tangerang Selatan
Email: igndjoko@batan.go.id
ABSTRACT
PRELIMINARY STUDY ON HYDROGEN PRODUCTION PROCESS BY APPLYING VHTR REACTOR COGENERATION CONCEPT. Increasing demand on clean energy quantitatively triggers the development of the renewable energy systems, which have to fulfill several criteria, such as abundant, safe and sustainable. As an energy carrier, hydrogen have been more researched even used as a settled energy generation as well as movable energy generation likely used in transportation. However, the proper and economically hydrogen production process still more necessary to be assessed and researched. There are three methods underlying the hydrogen production processes: water electrolysis, steam reforming of methane, and sulfur-iodine cycle. The energy resource necessities to the hydrogen production process supplied by fossil fuel combustion, resulting in the total efficiency are decreased. This paper explains the assessment of feasibility of several hydrogen production processes using nuclear energy. As a nuclear energy resource, the very high temperature reactor (VHTR) is used. VHTR is one of the six generation IV reactor concepts. The assessment are stressed in the comparison of the advantage and disadvantage for each hydrogen production process coupled with the reactor system of the VHTR as the concept of cogeneration, and the comparison of the efficiency of each process. The result shows that VHTR reactor cogeneration concept combined with sulfur-iodine cycle process become good alternative for hydrogen production installation.
Keyword : Hydrogen Production, cogeneration, very high temperature reactor, efficiency.
Published : Proceeding "SEMINAR NASIONAL PENGEMBANGAN ENERGI NUKLIR II 2009", Jakarta, 25 Juni 2009.
