A5021855838- Rocket and propulsion systems research
- Spacecraft and Cryogenic Technologies
- Energetic Materials and Combustion
- Field-Flow Fractionation Techniques
- Heat Transfer and Optimization
- Advanced Control Systems Design
- Advanced Thermodynamics and Statistical Mechanics
- Respiratory Support and Mechanisms
- Aerospace Engineering and Control Systems
- Industrial Automation and Control Systems
- Heat Transfer and Boiling Studies
- Geothermal Energy Systems and Applications
- Heat transfer and supercritical fluids
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Greenhouse Technology and Climate Control
- Solar-Powered Water Purification Methods
- Advanced Thermodynamic Systems and Engines
- Plasma Diagnostics and Applications
- Electronic Packaging and Soldering Technologies
- Intensive Care Unit Cognitive Disorders
Universidade Federal do Paraná
1999-2021
This paper introduces a general computational model for electronic packages, e.g., cabinets that contain equipment. A simplified physical model, which combines principles of classical thermodynamics and heat transfer, is developed the resulting three-dimensional differential equations are discretized in space using cell centered finite volume scheme. Therefore, combination proposed with adopted scheme numerical discretization called element (VEM). typical cabinet was built laboratory, two...
This paper presents a theoretical, numerical, and experimental study to investigate the possibility of optimizing configuration (geometry) underground heat exchangers for maximum transfer. The first part identifies novel fundamental optimization principle maximizing transfer between tube its surroundings, which is expected be present in any buried exchanger design. second practical application principle: simplified physical model determine temperature field inside an electronics shelter that...
Accurate determination of heat flux is an important task not only in the designing aspect, but also performance analysis rocket engines. In this purpose, work deals with a combustion chamber through inverse method. approach, transient determined from experimental temperature data measured at outer sidewall engine. physical phenomenon was modeled by one-dimensional equation cylindrical coordinates and material properties were considered constant. Furthermore, model solved using conduction...
The mechanical ventilators, also named artificial are devices used in Intensive Care Units (ICU) for clinically critical patients. equipment provides breathing the patient, creating favorable conditions patient recovery. It works as a system that is connected to electric grid and two other networks, one supplies compressed air pure oxygen. Inside gases mixed, then warmed up humidified be finally delivered patient. existing treatment of mixture not effective, since it delivers out normal...
Abstract Current refrigeration and air conditioning systems are mostly based on the vapor compression cycle, which require electrical energy input. Absorption have gained new interest due to possibility of utilizing waste heat as In addition, environmental impact generated by such is recognized much smaller than systems. Therefore, this work developed characterized an absorption system with innovative generator level optical control variable working fluid mass flow rate, potential for use in...
Potassium nitrate/sucrose propellant (KNSu) is a common solid propellant, which can be cold or hot crafted, employed in amateur and experimental model rockets. There limited burning rate data available for the KNSu, particularly cold-crafted one. In this study, KNSu composed of 65% potassium nitrate 35% sucrose was prepared through crafting by pressing with hydraulic press. For such particular method, we did not find any on versus combustion pressure. Therefore, experimentally determined...