The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform

M.a. Wijewardane - One of the best experts on this subject based on the ideXlab platform.

  • Waste heat recovery from thermo-Electric Generators (TEGs)
    Energy Reports, 2020
    Co-Authors: L.s. Hewawasam, A.s. Jayasena, M.m.m. Afnan, R.a.c.p. Ranasinghe, M.a. Wijewardane
    Abstract:

    Abstract Thermo-Electric Generators (TEGs) have been identified as promising solid-state devices to recover exhaust waste in internal combustion engines (ICEs). As the TEGs are able to convert heat directly into Electricity, they can be used to down size the alternator of the ICEs. However, the addition of new devices to the engine exhaust system leads to increase the back pressure of the engine and reduces the overall efficiency of the engine. Therefore, this study is conducted to understand the possibility of integrating the TEG to the muffler of the engine, without interrupting the functionality of the muffler to recover the waste heat of the engine exhaust system. Findings of the study shows that the thermo-Electric modules (TEMs) can be easily integrated to the muffler and Electricity can be conveniently generated using the exhaust energy available in the hot exhaust gas.

Michael Robert Swain - One of the best experts on this subject based on the ideXlab platform.

  • Modifications to Improve Fuel Consumption in the Remanufacture of Spark-Ignition Engines for Electric Generators
    Journal of Engineering for Gas Turbines and Power, 2016
    Co-Authors: Matthew Neill Swain, Oliver Patrick Jordan, Travis Jamal Mackey, Patrick Shannon Seemann, Hasitha Samarajeewa, Michael Robert Swain
    Abstract:

    This paper describes the development of a water-cooled, lean burn, gaseous fueled engine designed for distributed power installations. Electric Generators have become popular because they provide a portable supply of Electrical power at consumer demand. They are used in critical need areas such as hospitals and airports, and have found their way into homes frequented with power outages or homes in remote locations. Gensets are available in a wide variety of sizes ranging from 1 kilowatt (kW) to thousands of kilowatts. In the midrange, the power sources are typically spark-ignition, automotive type internal combustion engines. Since engines designed for automotive use are subject to different emission regulations, and are optimized for operation at revolutions per minute (RPM) and brake mean effective pressures (BMEPs) above that of Electric generator engines, modifications can be made to optimize them for gensets. This work describes modifications which can be made during remanufacturing an automotive engine to optimize it for use as a generator engine. While the work recognizes the potential for cost savings from the use of remanufactured automotive engines over that of using new automotive engines and the majority of the design constraints were adopted to reduce engine cost, the main focus of the work is quantifying the increase in fuel efficiency that can be achieved while meeting the required EPA emission requirements. This paper describes the seven combustion chamber designs that were developed and tested during this work. Friction reduction was obtained in both valve train and journal bearing design. The engine optimized for fuel efficiency produced a maximum brake thermal efficiency (BTE) of 37.5% with λ = 1.63. This yielded an EPA test cycle average brake specific fuel consumption (BSFC) of 325 g/kW hr. Modification of the spark advance and low load equivalence ratio to meet EPA Phase III emission standards resulted in an EPA test cycle average BSFC of 330 g/kW hr. When the engine used in this research was tested in its unmodified, automotive configuration under the EPA compliant test cycle, its EPA test cycle average BSFC was 443.4 g/kW hr. This is a 34% increase in fuel consumption compared to the modified engine.

  • Modifications to Improve Fuel Consumption in the Remanufacture of Spark Ignition Engines for Electric Generators
    Volume 2: Emissions Control Systems; Instrumentation Controls and Hybrids; Numerical Simulation; Engine Design and Mechanical Development, 2015
    Co-Authors: Matthew Neill Swain, Oliver Patrick Jordan, Travis Jamal Mackey, Patrick Shannon Seemann, Hasitha Samarajeewa, Michael Robert Swain
    Abstract:

    This paper describes the development of a water cooled, lean burn, gaseous fueled engine designed for distributed power installations. Electric Generators have become popular because they provide a portable supply of Electrical power at consumer demand. They are used in critical need areas such as hospitals and airports, and have found their way into homes frequented with power outages or homes in remote locations. Gensets are available in a wide variety of sizes ranging from 1 kilowatt (kW) to thousands of kilowatts. In the mid-range the power sources are typically spark ignition, automotive type internal combustion engines. Since engines designed for automotive use are subject to different emission regulations, and are optimized for operation at RPMs and BMEPs above that of Electric generator engines, modifications can be made to optimize them for gensets. This work describes modifications which can be made during remanufacturing an automotive engine to optimize it for use as a generator engine. While the work recognizes the potential for cost savings from the use of remanufactured automotive engines over that of using new automotive engines and the majority of the design constraints were adopted to reduce engine cost, the main focus of the work is quantifying the increase in fuel efficiency that can be achieved while meeting the required EPA emission requirements. This paper describes the seven combustion chamber designs that were developed and tested during this work. Friction reduction was obtained in both valve train and journal bearing design. The engine optimized for fuel efficiency produced a maximum brake thermal efficiency of 37.5% with λ= 1.63. This yielded an EPA test cycle average brake specific fuel consumption (BSFC) of 325 g/kW-hr. Modification of the spark advance and low load equivalence ratio to meet EPA Phase III emission standards resulted in an EPA test cycle average BSFC of 330 gm/kW-hr. When the engine used in this research was tested in its unmodified, automotive configuration under the EPA Compliant Test Cycle it’s EPA test cycle average brake specific fuel consumption was 443.4 gm/kW-hr. This is a 34% increase in fuel consumption compared to the modified engine.

Maurizio Sasso - One of the best experts on this subject based on the ideXlab platform.

  • experimental investigation to optimise a desiccant hvac system coupled to a small size cogenerator
    Applied Thermal Engineering, 2011
    Co-Authors: Giovanni Angrisani, Francesco Minichiello, Carlo Roselli, Maurizio Sasso
    Abstract:

    In the Mediterranean area, the increasing demand of summer cooling in residential and tertiary sectors is usually satisfied by Electrically-driven units; this often determines Electric load peaks and black-outs. Thus, a wide interest is spreading in small scale natural gas-fired polygeneration systems: a prime mover drives (mechanically, Electrically, thermally) Electric Generators and/or heat pumps, desiccant wheels, etc., matching thermal (heating and cooling) and Electric end-user requirements. In this paper, laboratory tests have been considered to experimentally evaluate a small scale polygeneration system based on a natural gas-fired Micro-CHP and a desiccant-based HVAC system. Cogenerated thermal power is used for the desiccant wheel regeneration, while Electric power for auxiliaries, chiller and external units. The HVAC system can also interact with Electric and thermal separate “production” systems. The main results of the experimental tests are shown, stating the increase of the COP of the chiller in desiccant-based HVAC systems. Then the paper identifies the operating conditions (outdoor and supply air thermal-hygrometric conditions, Electric grid efficiency and partial load operation of the MCHP) which guarantee significant primary energy savings (up to around 30%) and CO2 equivalent emission reductions (up to around 40%) of the polygeneration system compared to the conventional HVAC system.

  • Experimental investigation to optimise a desiccant HVAC system coupled to a small size cogenerator
    Applied Thermal Engineering, 2010
    Co-Authors: Giovanni Angrisani, Francesco Minichiello, Carlo Roselli, Maurizio Sasso
    Abstract:

    In the Mediterranean area, the increasing demand of summer cooling in residential and tertiary sectors is usually satisfied by Electrically-driven units; this often determines Electric load peaks and black-outs. Thus, a wide interest is spreading in small scale natural gas-fired polygeneration systems: a prime mover drives (mechanically, Electrically, thermally) Electric Generators and/or heat pumps, desiccant wheels, etc., matching thermal (heating and cooling) and Electric end-user requirements.

L.s. Hewawasam - One of the best experts on this subject based on the ideXlab platform.

  • Waste heat recovery from thermo-Electric Generators (TEGs)
    Energy Reports, 2020
    Co-Authors: L.s. Hewawasam, A.s. Jayasena, M.m.m. Afnan, R.a.c.p. Ranasinghe, M.a. Wijewardane
    Abstract:

    Abstract Thermo-Electric Generators (TEGs) have been identified as promising solid-state devices to recover exhaust waste in internal combustion engines (ICEs). As the TEGs are able to convert heat directly into Electricity, they can be used to down size the alternator of the ICEs. However, the addition of new devices to the engine exhaust system leads to increase the back pressure of the engine and reduces the overall efficiency of the engine. Therefore, this study is conducted to understand the possibility of integrating the TEG to the muffler of the engine, without interrupting the functionality of the muffler to recover the waste heat of the engine exhaust system. Findings of the study shows that the thermo-Electric modules (TEMs) can be easily integrated to the muffler and Electricity can be conveniently generated using the exhaust energy available in the hot exhaust gas.

Matthew Neill Swain - One of the best experts on this subject based on the ideXlab platform.

  • Modifications to Improve Fuel Consumption in the Remanufacture of Spark-Ignition Engines for Electric Generators
    Journal of Engineering for Gas Turbines and Power, 2016
    Co-Authors: Matthew Neill Swain, Oliver Patrick Jordan, Travis Jamal Mackey, Patrick Shannon Seemann, Hasitha Samarajeewa, Michael Robert Swain
    Abstract:

    This paper describes the development of a water-cooled, lean burn, gaseous fueled engine designed for distributed power installations. Electric Generators have become popular because they provide a portable supply of Electrical power at consumer demand. They are used in critical need areas such as hospitals and airports, and have found their way into homes frequented with power outages or homes in remote locations. Gensets are available in a wide variety of sizes ranging from 1 kilowatt (kW) to thousands of kilowatts. In the midrange, the power sources are typically spark-ignition, automotive type internal combustion engines. Since engines designed for automotive use are subject to different emission regulations, and are optimized for operation at revolutions per minute (RPM) and brake mean effective pressures (BMEPs) above that of Electric generator engines, modifications can be made to optimize them for gensets. This work describes modifications which can be made during remanufacturing an automotive engine to optimize it for use as a generator engine. While the work recognizes the potential for cost savings from the use of remanufactured automotive engines over that of using new automotive engines and the majority of the design constraints were adopted to reduce engine cost, the main focus of the work is quantifying the increase in fuel efficiency that can be achieved while meeting the required EPA emission requirements. This paper describes the seven combustion chamber designs that were developed and tested during this work. Friction reduction was obtained in both valve train and journal bearing design. The engine optimized for fuel efficiency produced a maximum brake thermal efficiency (BTE) of 37.5% with λ = 1.63. This yielded an EPA test cycle average brake specific fuel consumption (BSFC) of 325 g/kW hr. Modification of the spark advance and low load equivalence ratio to meet EPA Phase III emission standards resulted in an EPA test cycle average BSFC of 330 g/kW hr. When the engine used in this research was tested in its unmodified, automotive configuration under the EPA compliant test cycle, its EPA test cycle average BSFC was 443.4 g/kW hr. This is a 34% increase in fuel consumption compared to the modified engine.

  • Modifications to Improve Fuel Consumption in the Remanufacture of Spark Ignition Engines for Electric Generators
    Volume 2: Emissions Control Systems; Instrumentation Controls and Hybrids; Numerical Simulation; Engine Design and Mechanical Development, 2015
    Co-Authors: Matthew Neill Swain, Oliver Patrick Jordan, Travis Jamal Mackey, Patrick Shannon Seemann, Hasitha Samarajeewa, Michael Robert Swain
    Abstract:

    This paper describes the development of a water cooled, lean burn, gaseous fueled engine designed for distributed power installations. Electric Generators have become popular because they provide a portable supply of Electrical power at consumer demand. They are used in critical need areas such as hospitals and airports, and have found their way into homes frequented with power outages or homes in remote locations. Gensets are available in a wide variety of sizes ranging from 1 kilowatt (kW) to thousands of kilowatts. In the mid-range the power sources are typically spark ignition, automotive type internal combustion engines. Since engines designed for automotive use are subject to different emission regulations, and are optimized for operation at RPMs and BMEPs above that of Electric generator engines, modifications can be made to optimize them for gensets. This work describes modifications which can be made during remanufacturing an automotive engine to optimize it for use as a generator engine. While the work recognizes the potential for cost savings from the use of remanufactured automotive engines over that of using new automotive engines and the majority of the design constraints were adopted to reduce engine cost, the main focus of the work is quantifying the increase in fuel efficiency that can be achieved while meeting the required EPA emission requirements. This paper describes the seven combustion chamber designs that were developed and tested during this work. Friction reduction was obtained in both valve train and journal bearing design. The engine optimized for fuel efficiency produced a maximum brake thermal efficiency of 37.5% with λ= 1.63. This yielded an EPA test cycle average brake specific fuel consumption (BSFC) of 325 g/kW-hr. Modification of the spark advance and low load equivalence ratio to meet EPA Phase III emission standards resulted in an EPA test cycle average BSFC of 330 gm/kW-hr. When the engine used in this research was tested in its unmodified, automotive configuration under the EPA Compliant Test Cycle it’s EPA test cycle average brake specific fuel consumption was 443.4 gm/kW-hr. This is a 34% increase in fuel consumption compared to the modified engine.