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Current and Completed Projects

 

The following research projects have been approved for the 2014 research year by the Director of the Small and Smart Thermal Systems Laboratory. For inquiries, please contact Dr. Ohadi.

     

  • Advanced Hybrid Heat Exchanger for Aerospace High Temperature Application

  • Embedded Cooling of High Flux Electronics via Micro-Enabled Surfaces and Fluid Delivery System

     
    Embedded Cooling of High Flux Electronics via Micro-Enabled Surfaces and Fluid Delivery System
    Raphael Mandel, Daniel Bae, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

    Raphael Mandel’s thesis aims to demonstrate the potential for embedded cooling and FEEDS flow-delivery technology to vastly reduce thermal resistance between junction and sink in electronic systems.

  • Heat Exchanger Optimization

     
    Heat Exchanger Optimization
    Martinus Arie, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

    Martinus’ current research focus is on numerical modeling and optimization of the latest generation heat exchanger with highest performance, utilizing UMD’s patented manifold-microchannel technology.

  • Next Generation Mass Exchanger

     

    Next Generation Mass Exchanger
    Ratnesh Tiwari, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

    Through his PhD research, blended with his industrial expertise, Ratnesh aims to demonstrate the next generation mass exchanger to be used for several leading industrial processes such as CO2 capture, NH3 absorption. His current research focus is to apply micro-channel technology to refrigeration and oil and gas industrial processes by means of process intensification that would lead to miniaturization of heat and mass exchanger equipment in the current industrial processes.

  • Self-Cleaning Microchannel Reactor

     

     

    Self-Cleaning Microchannel Reactor
    Stefan Bangerth, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

    Micro structure surfaces are known for their potential to enhance absorption processes, e.g. in absorption refrigeration or gas cleaning applications. One of the main hurdles to more widespread usage of the technology is its sensitivity to clogging and fouling. The S2TS laboratory aims to address this obstacle by implementing an innovative self-cleaning mechanism into the reactor. Additionally, the reactor’s high stability design will allow to gather data on absorption using microchannels under elevated pressure conditions.

  •  

    Past Projects

  • Enhanced Cooling System for Power Electronics

  • Electrostatic Based Droplet Separation System

    • Velocity Based Defrost Control

    • Enhanced Cooling System for Power Electronics
    • Performance characterization of micro-scale condensers
    • Development of forced-feed micro channel evaporators and condensers for cooling of high flux electronics
    • Structural and mechanical design analysis of advanced micro-channel heat exchangers
    • Sand fouling of heat exchangers
    • Development of MEMS-based Micro-pump
    • EHD-enhanced in-tube and external boiling of alternate refrigerants/refrigerant mixture
    • EHD-enhanced in-tube and external condensation of alternate refrigerants/refrigerant mixtures
    • EHD-enhanced air-side heat transfer
    • Applicability of EHD to heat transfer enhancement in highly compact heat exchangers
    • EHD heat transfer enhancement in mini and microchannels
    • Control of frost formation on cold surfaces/coils using the EHD technique
    • Prototyping of an EHD-enhanced direct expansion evaporator
    • Prototyping of an EHD-enhanced condenser
    • Liquid-vapor separation and flow management using EHD technique
    • Electrode materials, design, and fabrication
    • EHD-enhanced thin film evaporation
    • Electrostatic (EHD)-Enhanced separation of liquid droplets from gas/liquid flows-Application to refrigeration and other systems
    • Micro and Macro-scale Electrohydrodynamic (EHD) Enhancement of Thin-film Evaporation
    • A Self-Contained System for Thermal Management of Next Generation Radars and Solid-State Lasers
    • Air-cooling of phased-array radar systems using low-profile, micro-groove heat sinks
    • Super-Compact Two-Phase Loop for Electronics Cooling and other High Heat Flux Applications
    • Self-Contained Cold Plate
    • High Heat Flux Electronics Cooling
    • Force Fed Evaporation
    • Force Fed Heat Sinks for High Heat Flux Cooling
    • Forced-Fed Heat Transfer for Ocean Thermal Energy Conversion
    • Force Fed Heat Transfer for High Performance Electronics Cooling
    • Forced-Fed Micro Channel Heat Transfer for High Heat Flux Cooling
    • Force Fed Microchannel High Heat Flux Cooling Utilizing Microgrooved Surfaces
    • A Self-Contained Two-Phase System for Thermal Management of High Heat flux Electronics
    • Novel Heat Exchangers: Pathways to New Levels of Efficiency
    • Development of a High COP, Waste Heat-driven Refrigeration System Utilizing Advanced Microchannel Heat Exchangers
    • Thin Film Evaporation on Microgrooved Surfaces: Application to High Flux Cooling
    • Thin Film Evaporation on Microstructured Surfaces
    • Next Generation Thin Film Heat Exchangers
    • Microstructured Surface Heat Exchanger and Heat Sink
    • Direct Cooling of Server CPUs in Data Centers
    • Heat Pump Frost Inhibition
    • High Heat Flux Thermal Management of Aircraft Avionics
    • High-performance Cooling of Next Gen Power Electronics

    Smart and Small Thermal Systems Laboratory (S2TS) » Current and Completed Projects
    ­

    Current and Completed Projects

     

    The following research projects have been approved for the 2014 research year by the Director of the Small and Smart Thermal Systems Laboratory. For inquiries, please contact Dr. Ohadi.

       

    • Advanced Hybrid Heat Exchanger for Aerospace High Temperature Application

    • Embedded Cooling of High Flux Electronics via Micro-Enabled Surfaces and Fluid Delivery System

       
      Embedded Cooling of High Flux Electronics via Micro-Enabled Surfaces and Fluid Delivery System
      Raphael Mandel, Daniel Bae, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

      Raphael Mandel’s thesis aims to demonstrate the potential for embedded cooling and FEEDS flow-delivery technology to vastly reduce thermal resistance between junction and sink in electronic systems.

    • Heat Exchanger Optimization

       
      Heat Exchanger Optimization
      Martinus Arie, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

      Martinus’ current research focus is on numerical modeling and optimization of the latest generation heat exchanger with highest performance, utilizing UMD’s patented manifold-microchannel technology.

    • Next Generation Mass Exchanger

       

      Next Generation Mass Exchanger
      Ratnesh Tiwari, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

      Through his PhD research, blended with his industrial expertise, Ratnesh aims to demonstrate the next generation mass exchanger to be used for several leading industrial processes such as CO2 capture, NH3 absorption. His current research focus is to apply micro-channel technology to refrigeration and oil and gas industrial processes by means of process intensification that would lead to miniaturization of heat and mass exchanger equipment in the current industrial processes.

    • Self-Cleaning Microchannel Reactor

       

       

      Self-Cleaning Microchannel Reactor
      Stefan Bangerth, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

      Micro structure surfaces are known for their potential to enhance absorption processes, e.g. in absorption refrigeration or gas cleaning applications. One of the main hurdles to more widespread usage of the technology is its sensitivity to clogging and fouling. The S2TS laboratory aims to address this obstacle by implementing an innovative self-cleaning mechanism into the reactor. Additionally, the reactor’s high stability design will allow to gather data on absorption using microchannels under elevated pressure conditions.

    •  

      Past Projects

    • Enhanced Cooling System for Power Electronics

    • Electrostatic Based Droplet Separation System

      • Velocity Based Defrost Control

      • Enhanced Cooling System for Power Electronics
      • Performance characterization of micro-scale condensers
      • Development of forced-feed micro channel evaporators and condensers for cooling of high flux electronics
      • Structural and mechanical design analysis of advanced micro-channel heat exchangers
      • Sand fouling of heat exchangers
      • Development of MEMS-based Micro-pump
      • EHD-enhanced in-tube and external boiling of alternate refrigerants/refrigerant mixture
      • EHD-enhanced in-tube and external condensation of alternate refrigerants/refrigerant mixtures
      • EHD-enhanced air-side heat transfer
      • Applicability of EHD to heat transfer enhancement in highly compact heat exchangers
      • EHD heat transfer enhancement in mini and microchannels
      • Control of frost formation on cold surfaces/coils using the EHD technique
      • Prototyping of an EHD-enhanced direct expansion evaporator
      • Prototyping of an EHD-enhanced condenser
      • Liquid-vapor separation and flow management using EHD technique
      • Electrode materials, design, and fabrication
      • EHD-enhanced thin film evaporation
      • Electrostatic (EHD)-Enhanced separation of liquid droplets from gas/liquid flows-Application to refrigeration and other systems
      • Micro and Macro-scale Electrohydrodynamic (EHD) Enhancement of Thin-film Evaporation
      • A Self-Contained System for Thermal Management of Next Generation Radars and Solid-State Lasers
      • Air-cooling of phased-array radar systems using low-profile, micro-groove heat sinks
      • Super-Compact Two-Phase Loop for Electronics Cooling and other High Heat Flux Applications
      • Self-Contained Cold Plate
      • High Heat Flux Electronics Cooling
      • Force Fed Evaporation
      • Force Fed Heat Sinks for High Heat Flux Cooling
      • Forced-Fed Heat Transfer for Ocean Thermal Energy Conversion
      • Force Fed Heat Transfer for High Performance Electronics Cooling
      • Forced-Fed Micro Channel Heat Transfer for High Heat Flux Cooling
      • Force Fed Microchannel High Heat Flux Cooling Utilizing Microgrooved Surfaces
      • A Self-Contained Two-Phase System for Thermal Management of High Heat flux Electronics
      • Novel Heat Exchangers: Pathways to New Levels of Efficiency
      • Development of a High COP, Waste Heat-driven Refrigeration System Utilizing Advanced Microchannel Heat Exchangers
      • Thin Film Evaporation on Microgrooved Surfaces: Application to High Flux Cooling
      • Thin Film Evaporation on Microstructured Surfaces
      • Next Generation Thin Film Heat Exchangers
      • Microstructured Surface Heat Exchanger and Heat Sink
      • Direct Cooling of Server CPUs in Data Centers
      • Heat Pump Frost Inhibition
      • High Heat Flux Thermal Management of Aircraft Avionics
      • High-performance Cooling of Next Gen Power Electronics

      Smart and Small Thermal Systems Laboratory (S2TS) » Current and Completed Projects
      ­

      Current and Completed Projects

       

      The following research projects have been approved by the Director of the Small and Smart Thermal Systems Laboratory. For inquiries, please contact Prof. Ohadi or Dr. Farah Singer.

         

      • Novel Polymer Composite Heat Exchanger for Dry Cool Power Plants

         
        Novel Polymer Composite Heat Exchanger for Dry Cool Power Plants
        David Hymas, Ramin Moradi, Martinus Arie, Farah Signer, Amir Shooshtari, Michael Ohadi, Hugh Bruck

        This project focuses on utilizing a newly developed form of additive manufacturing that is capable of produce high performance, lightweight heat exchangers out of readily available polymers and metals. This significantly reduces the amount of labor required to produce heat exchangers while also reducing the cost of the materials involved. Through continued development of the Metal Fiber Composite printing process and utilization of advanced materials, the team hopes to extend these capabilities to a wide range of applications including waste heat recover and electronics cooling.

      • Advanced Hybrid Heat Exchanger for Aerospace High Temperature Application

         
        Advanced Hybrid Heat Exchanger for Aerospace High Temperature Application
        Xiang Zhang, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

        Xiang’ current research is to take advantage of metal additive manufacturing technology to fabricate Inconel heat exchanger utilizing UMD’s patented manifold-microchannel technology for aerospace application, and to test the heat exchanger prototypes under high temperature conditions.

      • Heat Exchanger Optimization

         
        Heat Exchanger Optimization
        Martinus Arie, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

        Martinus’ current research focus is on numerical modeling and optimization of the latest generation heat exchanger with highest performance, utilizing UMD’s patented manifold-microchannel technology.

      • Embedded Cooling of High Flux Electronics via Micro-Enabled Surfaces and Fluid Delivery System

         
        Embedded Cooling of High Flux Electronics via Micro-Enabled Surfaces and Fluid Delivery System
        Raphael Mandel, Daniel Bae, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

        The rapid increase in heat dissipation of next-generation integrated circuits requires superior and more elaborate cooling methods. This project introduced a unique heat sink called the thin-Film Evaporation and Enhanced Delivery System (FEEDS), which numerically and experimentally demonstrated remarkable cooling capabilities above 1 kW/cm2. This approach significantly reduced thermal resistance between the electronic junction and the heat sink through the use of embedded fins, evaporation, and unique fluid delivery system.

      • Two-phase flow regimes and heat transfer in a manifolded-microgap

         
        Two-phase flow regimes and heat transfer in a manifolded-microgap
        David Deisenroth

        You know the force you feel when you turn sharply around a curve in a vehicle? Now imagine you’re doing 225 miles per hour around the head of a pin on the surface of the sun. That’s the kind of centrifugal acceleration and heat input occurring in the fluid I’m studying. As the liquid boils in this U-shaped flow path, the sharp difference in density between the liquid and vapor phases causes complex fluid dynamics to occur in our cutting-edge electronics cooling systems. By better understanding and characterizing these dynamics, we will further push the envelope of heat extracted per watt of power input into the cooling system.

      • Self-Cleaning Microchannel Reactor

         

         

        Self-Cleaning Microchannel Reactor
        Stefan Bangerth, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

        Micro structure surfaces are known for their potential to enhance absorption processes, e.g. in absorption refrigeration or gas cleaning applications. One of the main hurdles to more widespread usage of the technology is its sensitivity to clogging and fouling. The S2TS laboratory aims to address this obstacle by implementing an innovative self-cleaning mechanism into the reactor. Additionally, the reactor’s high stability design will allow to gather data on absorption using microchannels under elevated pressure conditions.

      • Next Generation Mass Exchanger

         

        Next Generation Mass Exchanger
        Ratnesh Tiwari, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

        Through his PhD research, blended with his industrial expertise, Ratnesh aims to demonstrate the next generation mass exchanger to be used for several leading industrial processes such as CO2 capture, NH3 absorption. His current research focus is to apply micro-channel technology to refrigeration and oil and gas industrial processes by means of process intensification that would lead to miniaturization of heat and mass exchanger equipment in the current industrial processes.

      • Energy Audit Projects

         

        In 2009, UMD established the Climate Action Plan demonstrating leadership's awareness of a need for energy improvements on campus and a commitment to implementing energy efficient practices. The aim is to reduce greenhouse gas emissions by 25% over 2005 levels by 2015, and by 50% by 2020. As S2TS is a leader in research and education in environmentally responsible and economically feasible integrated energy conversion systems for buildings and transportation, and with its excellent working relationship with UMD's Facilities Management (FM) department, S2TS performs energy audit/profiling and conservation analysis for select commercial and residential buildings, and Data centers on UMD campus. S2TS energy modeling efforts suggest opportunity for average savings of no less than 25%, with low cost/no cost measures and immediate or less than two years payback periods.

        Energy Audit at a glimpse:

        For more information about each building, click on the following links-

         

        Past Projects

      • Enhanced Cooling System for Power Electronics

         
        Enhanced Cooling System for Power Electronics
        Fabio Battaglia, Serguei Dessiatoun, Michael Ohadi

        The goal of this project is to maintain the temperatures of the electronic devices below dangerous values while increasing the heat flux as much as possible. A heat sink is designed and produced in the S2TS lab. It is combined to a pump less loop charged with dielectric refrigerant for cooling the resistances attached from the high heat flux provided. The same heat sink is also tested in a pump driven loop. In this application, the cooling capacity is increased due to the increased flow rate of the refrigerant.

      • Electrostatic Based Droplet Separation System

         

        Electrostatic Based Droplet Separation System
        Ning Yang, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

        Ning’s research focus is to develop a highly efficient, electrostatic based droplets separation system. This innovative technology could find potential applications in a variety of air-conditioning and refrigeration applications.

        • Velocity Based Defrost Control

           
          Velocity Based Defrost Control
          Kamalakkannan Muthusubramanian, Alex Verovsky, Serguei Dessiatoun, Amir Shooshtari, Michael Ohadi

          The purpose of this project is to find more efficient and effective ways of controlling crystal frost growth on external heat surfaces (heat exchangers). The direction and time duration of airflow are being optimized to complete defrost with the least expenditure of energy. They are also investigating the possibility of using higher air velocities to retard frost formation during the heating cycle of the heat pump.

        • Enhanced Cooling System for Power Electronics
        • Performance characterization of micro-scale condensers
        • Development of forced-feed micro channel evaporators and condensers for cooling of high flux electronics
        • Structural and mechanical design analysis of advanced micro-channel heat exchangers
        • Sand fouling of heat exchangers
        • Development of MEMS-based Micro-pump
        • EHD-enhanced in-tube and external boiling of alternate refrigerants/refrigerant mixture
        • EHD-enhanced in-tube and external condensation of alternate refrigerants/refrigerant mixtures
        • EHD-enhanced air-side heat transfer
        • Applicability of EHD to heat transfer enhancement in highly compact heat exchangers
        • EHD heat transfer enhancement in mini and microchannels
        • Control of frost formation on cold surfaces/coils using the EHD technique
        • Prototyping of an EHD-enhanced direct expansion evaporator
        • Prototyping of an EHD-enhanced condenser
        • Liquid-vapor separation and flow management using EHD technique
        • Electrode materials, design, and fabrication
        • EHD-enhanced thin film evaporation
        • Electrostatic (EHD)-Enhanced separation of liquid droplets from gas/liquid flows-Application to refrigeration and other systems
        • Micro and Macro-scale Electrohydrodynamic (EHD) Enhancement of Thin-film Evaporation
        • A Self-Contained System for Thermal Management of Next Generation Radars and Solid-State Lasers
        • Air-cooling of phased-array radar systems using low-profile, micro-groove heat sinks
        • Super-Compact Two-Phase Loop for Electronics Cooling and other High Heat Flux Applications
        • Self-Contained Cold Plate
        • High Heat Flux Electronics Cooling
        • Force Fed Evaporation
        • Force Fed Heat Sinks for High Heat Flux Cooling
        • Forced-Fed Heat Transfer for Ocean Thermal Energy Conversion
        • Force Fed Heat Transfer for High Performance Electronics Cooling
        • Forced-Fed Micro Channel Heat Transfer for High Heat Flux Cooling
        • Force Fed Microchannel High Heat Flux Cooling Utilizing Microgrooved Surfaces
        • A Self-Contained Two-Phase System for Thermal Management of High Heat flux Electronics
        • Novel Heat Exchangers: Pathways to New Levels of Efficiency
        • Development of a High COP, Waste Heat-driven Refrigeration System Utilizing Advanced Microchannel Heat Exchangers
        • Thin Film Evaporation on Microgrooved Surfaces: Application to High Flux Cooling
        • Thin Film Evaporation on Microstructured Surfaces
        • Next Generation Thin Film Heat Exchangers
        • Microstructured Surface Heat Exchanger and Heat Sink
        • Direct Cooling of Server CPUs in Data Centers
        • Heat Pump Frost Inhibition
        • High Heat Flux Thermal Management of Aircraft Avionics
        • High-performance Cooling of Next Gen Power Electronics