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RISS 인기검색어
- 검색키워드
- 저자 : G. PASTORE (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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EXERGY ANALYSIS OF A VAPOR ABSORPTION HEAT TRANSFORMER USING MODIFIED GUOY–STODALA EQUATION
J. PASTOR,G. SACHDEVA,R. BILASH 대한설비공학회 2014 International Journal Of Air-Conditioning and Refr Vol.22 No.3
In the present work, thermodynamic analysis of a Lithium bromide–water-based absorption heat transformer (AHT) is done using a mathematical model. The study includes exergy analysis with the introduction of external fluid arrangements working as the interface of heat exchange for the various components of the model. Quantitative results are obtained for a set of inputs and modified Guoy–Stodala equation is used to include the real heat exchange temperatures in the study. These results are compared to the classical approach. It is observed that the total irreversibility calculated by the modified approach comes out to be 26.1% more than the exergy destruction obtained by the classical approach. Next, different operating parameters are varied to understand the effect of these on exergy destruction using a computer programme code. Thus, a conclusion is drawn in the form of graphs, as to how the system performance can be improved. Using the concept of irreversibility, the study finds that the performance of the system can be enhanced by decreasing the temperature of evaporator and generator or by increasing the temperature of condenser and absorber.
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MULTISCALE MODELLING FOR THE FISSION GAS BEHAVIOUR IN THE TRANSURANUS CODE
P. VAN UFFELEN,G. PASTORE,V. DI MARCELLO,L. LUZZI 한국원자력학회 2011 Nuclear Engineering and Technology Vol.43 No.6
A formulation is proposed for modelling the process of intra-granular diffusion of fission gas during irradiation of UO2under both normal operating conditions and power transients. The concept represents a simple extension of the formulation of Speight, including an estimation of the contribution of bubble motion to fission gas diffusion. The resulting equation is formally identical to the diffusion equation adopted in most models that are based on the formulation of Speight, therefore retaining the advantages in terms of simplicity of the mathematical-numerical treatment and allowing application in integral fuel performance codes. The development of the new model proposed here relies on results obtained by means of molecular dynamics simulations as well as finite element computations. The formulation is proposed for incorporation in the TRANSURANUS fuel performance code.
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MULTISCALE MODELLING FOR THE FISSION GAS BEHAVIOUR IN THE TRANSURANUS CODE
Van Uffelen, P.,Pastore, G.,Di Marcello, V.,Luzzi, L. Korean Nuclear Society 2011 Nuclear Engineering and Technology Vol.43 No.6
A formulation is proposed for modelling the process of intra-granular diffusion of fission gas during irradiation of $UO_2$ under both normal operating conditions and power transients. The concept represents a simple extension of the formulation of Speight, including an estimation of the contribution of bubble motion to fission gas diffusion. The resulting equation is formally identical to the diffusion equation adopted in most models that are based on the formulation of Speight, therefore retaining the advantages in terms of simplicity of the mathematical-numerical treatment and allowing application in integral fuel performance codes. The development of the new model proposed here relies on results obtained by means of molecular dynamics simulations as well as finite element computations. The formulation is proposed for incorporation in the TRANSURANUS fuel performance code.
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