Two-phase reservoir: development of a transient thermo-hydraulic model based on bond graph approach with experimental validation

Abstract

International audienceThe main purpose of the project FUI THERMOFLUID is to study the feasibility of a new electronic cooling system embedded on flying objects (missile, satellite, and airplane). The technology chosen consists of a pumped two-phase flow cooling loop (PTPFL). It is an innovativetechnology with a transport capacity of the thermal power up to 10 MW.m, exceeding in this way the performance of all other technologies. A PTPFL is a cooling loop based on the exploitation of the latent heat properties of the fluid trapped inside the loop, and moved by a pump. The components constituting a PTPFL are: a two-phase reservoir (TP-R), a mini-channels evaporator, a brazed plate condenser, a pump, and pipes.The global research work is devoted to propose a dynamic model and experimental validation of the PTPFL. The present article is exclusivelydedicated to the TP-R. Indeed, this element plays a key role in the functioning of PTPFL. Historically, the TP-R did not equip the first coolingloop. However, due to its advantages, its introduction was essential. The developed dynamic model will be used in another work to predict thethermal hydraulic efficiency of the PTPFL from its mechanical and fluidic parameters, to conduct the study of transitional regimes and instabilityproblems, and provides an original tool dedicated to design the TP-R in function of the thermal power levels to be evacuated and the selectedrefrigerant. The bond graph methodology is adopted for modelling works because of its energetic approach and multi-physics character ofthe studied system. The new model proposed in this article has many originalities: First, it is based on bond graph approach. Nowadays, theopen literature shows that no bond graph model has been developed for such thermo-fluid system. Second, the dynamic model of TP-R paysgreat attention to phenomena that have never been taken into account in works cited in the present article, such as evaporation and condensation.Third, different conducto-convective heat exchanges are modelled without any experimental recalibration of the thermal exchange coefficients,unlike models proposed in the literature. In fact, all coefficients are systematically calculated using adequate correlations

Design and Optimization of Synchronous Motor Using PM Halbach Arrays for Rim-Driven Counter-Rotating Pump

“…To validate the operation of the rim-driven inducer, a dynamic model of the counterrotation pump will be analyzed and simulated. As the model pump considers the thermal, electromagnetic, and hydraulic behavior of the pump, it is proposed to use the bond graph modeling as in [31][32][33][34][35][36].…”

Three-Dimensional Dynamic Modelling and Validation for Vibration of a Beam-Cable System

“…The bond graph method is used owing to the ease with which submodels of cables and beams can be connected to each other. In bond graphs, a small set of generalized elements is used to represent energy exchange with the environment, energy storage and dissipation, generalized loop and node laws, and power-conserving transformations and gyrator effects [24,25]. The connection of the cable bond graph submodels to the beam bond graph submodel is as simple as drawing a power bond between them.…”