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About Our Lab

The mission of thermal-laser labortory is to develop laser-based technologies for measurement, diagnostics, and material processing. Taking advantage of the unique characteristics of laser light, techniques are being developed to make temperature, concentration, and other thermal  prperty measurement, with an emphasis on liquieds.

Current Projects

Condensing Flue Gas Water Vapor for Cool Storage

PPcoolingStony Brook University will develop a thermosyphon system that condenses water vapor from power plant flue gas by using highly efficient phase-change heat transfer. Heat is rejected to the ambient using an innovative air-cooled polymer heat exchanger with high thermal conductivity. The polymer construction will diminish corrosion effects from the flue gas. The resulting condensate can be stored and used for subsequent evaporative cooling when the ambient temperature exceeds acceptable operating limits.

Vulleumier Heat Pump (VHP) Modeling and Optimization

VMThe VHP moves a working gas, such as helium, between three chambers within a closed system. Two displacers reciprocate within a cylinder to move the working gas between separate hot, warm, and cold chambers. The thermodynamic cycle utilizes differences in pressure, temperature, and volume (ideal gas law) to create a pressure wave, resulting in pockets of both very hot and very cold temperatures. This heat difference can be exploited to extract heat from one environment and move it to another environment, while also doing so at very low ambient temperatures. The VHP uses heat only and avoids the energy losses associated with the conversion and phase changes of conventional compressor based heap pump systems. This project will build a thermodynamic model to analysis and optimize the VHP.

Flexible All-Wireless Inter-Rack Fabric for Datacenters Using Free-Space Optics

FSOData centers are a critical piece of the infrastructure supporting our society. The design of a robust data center network fabric is challenging as it must satisfy several goals, viz., high performance, low equipment and management cost, incremental expandability to add new servers, and other practical concerns such as cabling complexity, and power and cooling costs. The project envisions and delivers on a datacenter network design approach that is radically different from prior architectures: a fully flexible, all-wireless fabric using Free-Space Optics (FSO) communication links, which essentially use laser beams to wirelessly transmit data through air.

Finished Projects:

1. Thermoelectrically Powered Sensing For Nuclear Power Plants.
2. Integrated Fabrication of TEGs using Thermal Spray and Laser Micromachining.
3. Application of a Two-Phase Closed Thermosyphon To Improve Refrigerator Efficiency.
4. Radiation Sky Cooling for Improved Residential Appliance Efficiency.



Please contact Professor Longtin for open position opportunities.

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