INTERMEDIATE HEAT EXCHANGER (IHX) EFFECTIVENESS CALCULATION OF THE COGENERATION SYSTEM OF HIGH TEMPERATURE GAS-COOLED REACTOR (HTGR)
Ign. Djoko Irianto
Center For Reactor Technology and Nuclear Safety - BATAN
Kompleks Puspiptek Serpong, Tangerang Selatan
ABSTRACT
INTERMEDIATE HEAT EXCHANGER (IHX) EFFECTIVENESS CALCULATION OF THE COGENERATION SYSTEM OF HIGH TEMPERATURE GAS-COOLED REACTOR (HTGR). 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 using cogeneration configuration for electric generation and for hydrogen production. VHTR employs a helium-coolant with operating pressure 5,0 MPa and 950oC 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 or another application. The success of VHTR design is affected by many factors, one of which is the performance of IHX. To support the conceptual design, many factors which affect the IHX performance particularly high temperature IHX have to be examined, calculated and analyzed. Many factors which affect the IHX performance is namely effectiveness, total heat transfer, etc. In this research, the effectiveness of the conceptually designed of IHX which refer to IHX in GTHTR300C and the total heat transfer of IHX for the cogeneration systems have been calculated using variant of inlet temperature. Total IHX heat transfer and the effectiveness are calculated using e-NTU (Number of Transfer Unit) method. With assumption of a helium-coolant used in the both side of IHX, the optimal effectiveness IHX is 0.95. Conceptually, it can be concluded that this IHX is effective to be used in the HTGR cogeneration based on VHTR.
Keywords: High temperature gas-cooled reactor (HTGR), cogeneration, IHX, effectiveness, efektivitas, metode number of transfer units (NTU method)
Published : Prosiding Seminar Nasional Ke-16 "TEKNOLOGI DAN KESELAMATAN PLTN SERTA FASILITAS NUKLIR", Surabaya, 28 Juli 2010
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
