Spacecraft Thermal Management Using Advanced Hybrid Two-Phase Loop Technology

2007 ◽  
Author(s):  
Chanwoo Park ◽  
Aparna Vallury ◽  
Jon Zuo ◽  
Jeffrey Perez ◽  
Paul Rogers
Keyword(s):  
Thermal Management ◽  
Two Phase ◽  
Phase Loop

Model-Based Dynamic Control of Active Thermal Management System

2017 ◽  
Author(s):  
Nathan Van Velson ◽  
Srujan Rokkam ◽  
Quang Truong ◽  
Bryan Rasmussen
Keyword(s):  
Thermal Management ◽  
Heat Exchangers ◽  
Flow Boiling ◽  
Control Volume ◽  
Dynamic Control ◽  
Two Phase ◽  
Finite Control ◽  
Phase Loop ◽  
Boiling Flow ◽  
And Control

Two-phase cooling technologies, pumped two-phase and vapor compression systems in particular are highly desirable advanced thermal management systems due to the large amounts of heat transfer capabilities available via boiling flow, as well as the inherent isothermality of two-phase processes. However, two-phase heat exchangers face distinctive challenges such as flow boiling instabilities and critical heat flux. In this work, we make developments toward a simulation framework to provide a real-time capability for thermal modeling, simulation and control using embedded software capabilities of Matlab/Simulink. The framework utilizes a highly accurate finite control volume approach to model two-phase heat exchangers, semi-empirical map model for variable speed pump, and one dimensional fluid flow model for pipe. The framework is validated experimentally under transient heat loads against a pumped two-phase loop with two parallel evaporators at Advanced Cooling Technologies, Inc.

Electronics Thermal Management Using Advanced Hybrid Two-Phase Loop Technology

2007 ◽  
Author(s):  
Chanwoo Park ◽  
Aparna Vallury ◽  
Jon Zuo ◽  
Jeffrey Perez ◽  
Paul Rogers
Keyword(s):  
Thermal Management ◽  
High Performance ◽  
Cooling System ◽  
Active Flow Control ◽  
Heat Pipes ◽  
High Heat ◽  
Heat Fluxes ◽  
Significant Advance ◽  
Two Phase ◽  
Phase Loop

The paper discusses an advanced Hybrid Two-Phase Loop (HTPL) technology for electronics thermal management. The HTPL combined active mechanical pumping with passive capillary pumping realizing a reliable yet high performance cooling system. The evaporator developed for the HTPL used 3-dimensional metallic wick structures to enhance boiling heat transfer by passive capillary separation of liquid and vapor phases. Through the testing using various prototype hybrid loops, it was demonstrated that the hybrid loops were capable of removing high heat fluxes from multiple heat sources with large surface areas up to 135cm2 and 10kW heat load. Because of the passive capillary phase separation, the hybrid loop operation didn’t require any active flow control of the liquid in the evaporator, even at highly transient and asymmetrical heat inputs between the evaporators. These results represent the significant advance over state-of-the-art heat pipes, loop heat pipes and evaporative spray cooling devices in terms of performance, robustness and simplicity.

Study of a Loop Thermosyphon Evaporator for Thermal Control of Aircrafts

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Gabriela C. Vieira ◽  
Juan Pablo Flórez M ◽  
Marcia B. H. Mantelli
Keyword(s):  
Thermal Management ◽  
External Surface ◽  
Experimental Studies ◽  
Thermal Control ◽  
Heat Sources ◽  
Two Phase ◽  
Aircraft Fuselage ◽  
Start Up ◽  
Thermal Management Of Electronics ◽  
Phase Loop

This work presents experimental studies of a two-phase loop thermosyphon, designed to use the aircraft fuselage low temperatures at high altitude to promote passive thermal management of electronics components in avionics. The main purpose of this work is to develop the evaporator of a loop thermosyphon composed of one evaporator coupled to two condensers presented in the literature. The proposed evaporator comprises ten square stacked copper plates bonded by diffusion. Channels were manufactured in the inner plates so that internal grooves are obtained after the stack is bonded. Studies with concentrated and distributed heat sources over the evaporator external surface are under performance. Parameters such as start-up and operation temperatures will be compared, according to the condition submitted.

Thermal Characterization of Interlayer Microfluidic Cooling of Three-Dimensional Integrated Circuits With Nonuniform Heat Flux

2010 ◽  
Vol 132 (4) ◽  
Author(s):  
Yoon Jo Kim ◽  
Yogendra K. Joshi ◽  
Andrei G. Fedorov ◽  
Young-Joon Lee ◽  
Sung-Kyu Lim
Keyword(s):  
Integrated Circuits ◽  
Mass Flow Rate ◽  
Thermal Management ◽  
Mass Flow ◽  
Flow Rate ◽  
Single Phase ◽  
Hot Spot ◽  
Three Dimensional ◽  
Two Phase ◽  
Two Phase Cooling

It is now widely recognized that the three-dimensional (3D) system integration is a key enabling technology to achieve the performance needs of future microprocessor integrated circuits (ICs). To provide modular thermal management in 3D-stacked ICs, the interlayer microfluidic cooling scheme is adopted and analyzed in this study focusing on a single cooling layer performance. The effects of cooling mode (single-phase versus phase-change) and stack/layer geometry on thermal management performance are quantitatively analyzed, and implications on the through-silicon-via scaling and electrical interconnect congestion are discussed. Also, the thermal and hydraulic performance of several two-phase refrigerants is discussed in comparison with single-phase cooling. The results show that the large internal pressure and the pumping pressure drop are significant limiting factors, along with significant mass flow rate maldistribution due to the presence of hot-spots. Nevertheless, two-phase cooling using R123 and R245ca refrigerants yields superior performance to single-phase cooling for the hot-spot fluxes approaching ∼300 W/cm2. In general, a hybrid cooling scheme with a dedicated approach to the hot-spot thermal management should greatly improve the two-phase cooling system performance and reliability by enabling a cooling-load-matched thermal design and by suppressing the mass flow rate maldistribution within the cooling layer.

Two-phase evaporative battery thermal management technology for EVs/HEVs

2017 ◽  
Vol 18 (5) ◽  
pp. 875-882 ◽  
Author(s):  
Rahman Ataur ◽  
Mohammed Nurul Amin Hawlader ◽  
Helmi Khalid
Keyword(s):  
Thermal Management ◽  
Two Phase ◽  
Battery Thermal Management ◽  
Management Technology
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