Performance Characteristics And Optimal Analysis Of Energy Conversion Devices Based On Quantum Dot

This paper mainly studies performance of the energy conversion device based on quantum dots.Our work is mainly about to establishing innovative structure,to achieve the purpose of energy conversion.And according to the Master Equation theory,we derive various thermodynamic performance parameters of energy conversion device,such as output power,cooling rate,efficiency and so on.We will further optimize the different parameters of the model,obtain the performance characteristics and optimization curves of the energy conversion device by numerical simulation,so as to understand the further optimization of the model in theory.And we hope that our work of this paper can provide some theoretical guidance to the design and operation of the actual quantum dot energy conversion device.Our mainly studies of this paper include these parts:In the first chapter,we introduce the research background of micro-nano energy conversion device and micro-nano energy conversion device based on quantum dot.Then we introduce some thermodynamic theory and finite time thermodynamic theory used.The theory mainly includes reversible process theory and Carnot efficiency,and internal reversible process and Curzon-Ahlborn efficiency,and the main equation theory.we briefly introduce the related studies of other people,and briefly introduces a hybrid driven three-terminal quantum dot refrigerator model.In the second chapter,we introduce a photon-driven three-terminal quantum dot hybrid heat engine model,which can convert the energy from the photon heat terminal into external energy,while cooling the low temperature electronic heat terminal.The device uses the quantum dots as the main component of the energy conversion device,which consists of two single-level quantum dots,two electronic terminals and a photon terminal.We describe the model of this hybrid heat engine in a schematic picture in this paper.Then we describe the working region of the hybrid heat engine by gragh in the situation of no nonradiative effects.And at selecting different parameters,we plot the 3D projection graphs of the total output power and efficiency by numerical simulation.Then we make characteristic curves of the total output power varying with the efficiency at various values of nonradiative effects.In the third chapter,we choose nonradiative effect and the difference of energy level as the optimization parameters.We plot the curves of the optimal performance parameters varying with the nonradiative effects and energy level difference.We analyze the effect of nonradiative effect and the difference of energy level on the performance of the hybrid heat engine,and obtain some conclusions about the optimization of the hybrid heat engine.In the fourth chapter,we summarize the work of this paper and give some direction for future research.