ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-472-4
ISBN Online: 978-1-56700-471-7
3rd Thermal and Fluids Engineering Conference (TFEC)
Multi-objective Optimization for a Free-piston Vuilleumier Heat Pump Based on an Evolutionary Algorithm
要約
Vuilleumier heat pump (VHP) is a heat driven heat pump that can be used for both heating and
cooling. A free-piston Vuilleumier heat pump (FVHP) is described as an alternative approach to
reduce the construction cost. In this paper, a thermodynamic model based on fundamental and
empirical correlations is built to estimate the heat output and coefficient of performance (COP) of the
FVHP under different configurations and operating conditions. Several prototypes are also designed
and tested recently to verify the modeling results. Since parameters like heat exchanger length,
regenerator thickness, chamber diameter and so on would affect the heat output and COP
significantly, a multi-objective optimization is essential for the future FVHP design to achieve higher
heat output and COP. The second version of Non-dominated Sorting Genetic Algorithm (NSGA-II)
is integrated into the thermodynamic model for the multi-objective optimization. Necessary design
parameters are considered as the decision variables. The heating output and COP of the FVHP are
decided as the objective functions. A final optimal solution has been selected based on necessary
decision-making approaches.