Energy impact of climate control in pig farming: Dynamic simulation and experimental validation

2022 ◽  
Vol 309 ◽  
pp. 118457
Author(s):  
Andrea Costantino ◽  
Lorenzo Comba ◽  
Paolo Cornale ◽  
Enrico Fabrizio
Author(s):  
K. Harold Yae ◽  
Su-Tai Chern ◽  
Howyoung Hwang

Abstract Using forward and inverse dynamic analysis, the dynamic simulation of a backhoe has been compared with experiments. In the experiment, recorded were the configuration and force histories; that is, velocity and position, and force output from the hydraulic cylinder-all were measured in the time domain. When the experimental force history is used as driving force in the simulation, forward dynamic analysis produces a corresponding motion history. And when the experimental motion history is used as if a prescribed trajectory, inverse dynamic analysis generates a corresponding force history. Therefore, these two sets of motion and force histories — one set from experiment, and the other from the simulation that is driven forward and backward with the experimental data — are compared in the time domain. The comparisons are discussed in regard to the effects of variations in initial conditions, friction, and viscous damping.


2020 ◽  
Vol 154 ◽  
pp. 187-200 ◽  
Author(s):  
Jinli Chen ◽  
Gang Xiao ◽  
Mario Luigi Ferrari ◽  
Tianfeng Yang ◽  
Mingjiang Ni ◽  
...  

2013 ◽  
Author(s):  
R S Prabakar ◽  
Arpan Nagar ◽  
Maruthi patil ◽  
Umashankar N ◽  
Sathya Prasad Mangalaramanan PhD

2017 ◽  
Author(s):  
Moisés Tiago Christofoletti ◽  
André Morais Ferreira ◽  
Desirée Farinelli de Souza ◽  
Marcelo Leandro dos Santos

2012 ◽  
Vol 134 (11) ◽  
Author(s):  
Pengfei Li ◽  
John E. Seem ◽  
Yaoyu Li

Calculation of time derivatives of refrigerant pressures is important for dynamic simulation of heat exchangers in vapor compression cycles, i.e., typically the condenser and evaporator. This technical brief presents an experimental study on the pressure transient for the condenser and evaporator of a screw chiller with R134a, along with the analysis for the associated time derivatives. The experimental results from eight test cases suggest that the time derivatives of the condenser and evaporator pressures at their inlet are extremely close to those at the respective outlets. This observation can thus justify the key assumption of equal time derivatives of pressures in the dynamic modeling of heat exchangers, which in consequence improves the numerical efficiency and/or convergence, especially for large and complex thermal-fluid systems.


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