Dynamic Modelling of Small Scale and High Temperature ORC System Using Simulink and CoolProp

2021 ◽  
Author(s):  
Radheesh Dhanasegaran ◽  
Antti Uusitalo ◽  
Teemu Turunen-Saaresti
Keyword(s):  
High Temperature ◽  
Dynamic Modelling ◽  
Small Scale

Dynamic Modelling of Small Scale and High Temperature ORC System Using Simulink and CoolProp

2020 ◽  
Author(s):  
Radheesh Dhanasegaran ◽  
Antti Uusitalo ◽  
Teemu Turunen-Saaresti
Keyword(s):  
High Temperature ◽  
Dynamic Model ◽  
High Speed ◽  
Waste Heat ◽  
Fluid Pressure ◽  
Dynamic Modelling ◽  
Working Fluid ◽  
Small Scale ◽  
Condensation Process ◽  
Feed Pump

Abstract In the present work, a dynamic model has been developed for the small-scale high-temperature ORC experimental test rig at the LUT University that utilizes waste heat from a heavy-duty diesel engine exhaust. The experimental facility consists of a high-speed Turbogenerator, heat exchanger components such as recuperator, condenser, and evaporator with a pre-feed pump to boost the working fluid pressure after the condensation process constituting a cycle. The turbogenerator consists of a supersonic radial-inflow turbine, a barske type main-feed pump, and a permanent magnet type generator components connected on a single shaft. Octamethyltrisiloxane (MDM) is the chosen organic working fluid in this cycle. Matlab-Simulink environment along with the open-source thermodynamic and transport database Cool-Prop has been chosen for calculating the thermodynamic properties of the dynamic model. A functional parameter approach has been followed for modeling each block component by predefined input and output parameters, aimed at modeling the performance characteristics with a limited number of inputs for both design and off-design operations of the cycle. The dynamic model is validated with the experimental data in addition to the investigation of exhaust gas mass flow regulation that establishes a control strategy for the dynamic model.

scholarly journals Mechanical Properties of Spruce Wood Extracted from GLT Beams Loaded by Fire

2021 ◽  
Vol 13 (10) ◽  
pp. 5494
Author(s):  
Lucie Kucíková ◽  
Michal Šejnoha ◽  
Tomáš Janda ◽  
Jan Sýkora ◽  
Pavel Padevět ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Cross Section ◽  
Negative Impact ◽  
Tensile Tests ◽  
Thermal Recovery ◽  
Bending Test ◽  
Small Scale ◽  
Spruce Wood ◽  
The Impact

Heating wood to high temperature changes either temporarily or permanently its physical properties. This issue is addressed in the present contribution by examining the effect of high temperature on residual mechanical properties of spruce wood, grounding on the results of full-scale fire tests performed on GLT beams. Given these tests, a computational model was developed to provide through-thickness temperature profiles allowing for the estimation of a charring depth on the one hand and on the other hand assigning a particular temperature to each specimen used subsequently in small-scale tensile tests. The measured Young’s moduli and tensile strengths were accompanied by the results from three-point bending test carried out on two groups of beams exposed to fire of a variable duration and differing in the width of the cross-section, b=100 mm (Group 1) and b=160 mm (Group 2). As expected, increasing the fire duration and reducing the initial beam cross-section reduces the residual bending strength. A negative impact of high temperature on residual strength has also been observed from simple tensile tests, although limited to a very narrow layer adjacent to the charring front not even exceeding a typically adopted value of the zero-strength layer d0=7 mm. On the contrary, the impact on stiffness is relatively mild supporting the thermal recovery property of wood.

scholarly journals High temperature mechanical deformation of an additive manufactured nickel based superalloy using small scale test methods

2018 ◽  
Vol 1 (S1) ◽  
pp. 21
Author(s):  
H. Hilal ◽  
R.J. Lancaster ◽  
S.P. Jeffs ◽  
L. Ednie ◽  
J. Boswell ◽  
...  
Keyword(s):  
High Temperature ◽  
Mechanical Deformation ◽  
Test Methods ◽  
Small Scale ◽  
Nickel Based Superalloy ◽  
Scale Test

Macroscopic High-Temperature Structural Analysis Model of Small-Scale PCHE Prototype (II)

2011 ◽  
Vol 35 (9) ◽  
pp. 1137-1143 ◽  
Author(s):  
Kee-Nam Song ◽  
Heong-Yeon Lee ◽  
Sung-Deok Hong ◽  
Hong-Yoon Park
Keyword(s):  
High Temperature ◽  
Structural Analysis ◽  
Small Scale ◽  
Analysis Model

Macroscopic High-Temperature Structural Analysis Model for a Small-Scale PCHE Prototype (I)

2011 ◽  
Vol 35 (11) ◽  
pp. 1499-1506 ◽  
Author(s):  
Kee-Nam Song ◽  
Heong-Yeon Lee ◽  
Chan-Soo Kim ◽  
Sung-Duk Hong ◽  
Hong-Yoon Park
Keyword(s):  
High Temperature ◽  
Structural Analysis ◽  
Small Scale ◽  
Analysis Model
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