Abstract: Disclosed related to a co-generation comprising a heat exchanger heating water; a heat transfer path connected with the water heat exchanger to transfer heat; a hot water storage tank connected with the water heat exchanger and the water circulation path; a hot water storage water supply apparatus supplying water in the hot water storage tank to the water circulation path; a water supply path connected with the water circulation path; a water supply apparatus supplying water to the water supply path; and a hot water supply heat exchanger bypassing apparatus and bypassing the water supplied to the water circulation path from the hot water storage tank through the hot water supply heat exchanger.

Abstract: The system comprises a main cogeneration module which can be supplied with a flow of fuel for a combustion process and is able to generate electrical energy and thermal energy in the form of a flow of at least one first hot fluid, preferably water. The main module has an electrical output terminal or node which can be directly connected to electrical user appliances and can be connected in parallel to an external electric power generating and supply network via a controlled switching device.

Abstract: An electrostatic induction generator requiring no electric power supply device and capable of being mounted on a printed board is obtained. This electrostatic induction generator includes a pair of first electrodes capable of storing charges, a pair of vibrating electrodes capable of vibrating in a first direction and a second direction different from the first direction, and charged with opposite charges due to charges stored in the pair of first electrodes respectively, and a second electrode for electrically connecting the pair of vibrating electrodes to each other in a case where the pair of vibrating electrodes are at prescribed positions.

Abstract: Described herein is a fluid device for the recovery of the kinetic energy of land vehicles, comprising an intake line, a delivery line, and a pumping unit, which is connected to the intake line and to the delivery line, and at least one actuating element set along a street or railroad course of an infrastructure for the transit of vehicles, functionally connected to the pumping unit and mobile between a position of unloading and a position of loading, in which the actuating element is designed to be surmounted by a vehicle travelling along the street or railroad infrastructure.

Abstract: A combined heat and power system that may be ON/OFF controlled by the thermal load requirements for the system and/or operated at or below atmospheric pressure.

Abstract: There is disclosed a system for use in transport vehicles, comprising in combination an auxiliary power unit (APU) for a transport vehicle powered by a diesel engine and having a fuel system, an engine exhaust system and a battery powered electrical system; and a locator unit for use in a tracking and monitoring system for communicating over a communication network with the locator unit and with a remote location the APU, wherein the locator unit is attached to or installed within the APU.

Abstract: An on-site electrical power generation system utilizing environmentally hazardous waste oils as a combustible fuel. The disclosed invention utilizes environmentally hazardous waste oils generated by one or more on-site processes, such as, for example, by the maintenance of transportation vehicles. In addition, the system is adapted to provide local space heating and hot water as a byproduct of the combustion process.

Abstract: This invention discloses a vehicle electrical system voltage regulator with improved electrical protection and warning means that discerns and responds to regulator, generator, or vehicle electrical system operation and malfunctions. The regulator includes monitoring, control, and protection circuits with a phase signal monitor, a field switching circuit that operates the field coil in response to electrical power demands, and a field enable switch in series with the field regulating switch. The phase monitor and protection circuit ascertains and transmits generator rotational motion for use by the monitoring and control circuit in discerning the various operating conditions. The monitoring and control circuit operates on the field switching circuit to meet the electrical power demands and provide multi level fault protection to include field switching circuit reconfiguration to continue operating under various fault conditions.

Abstract: A method and apparatus for operating a combined-cycle power system is provided. The system is coupled to an electric power grid. The system includes at least one electric power generator, at least one steam turbine coupled to the generator, at least one combustion turbine coupled to the generator, and at least one steam source that is in flow communication with the steam turbine. The method includes operating the system at a first power output level with the steam turbine and the combustion turbine being synchronized to an operating frequency of the grid, so that the steam turbine, the combustion turbine, and the grid are operating at a frequency substantially similar to a standardized grid frequency value. The method also includes sensing a grid frequency deviation away from the standardized grid frequency value.

Abstract: Energy conversion systems utilizing nanometer scale assemblies are provided that convert the kinetic energy (equivalently, the thermal energy) of working substance molecules into another form of energy that can be used to perform useful work at a macroscopic level. These systems may be used to, for example, produce useful quantities of electric or mechanical energy, heat or cool an external substance or propel an object in a controllable direction. In particular, the present invention includes nanometer scale impact masses that reduce the velocity of working substance molecules that collide with this impact mass by converting some of the kinetic energy of a colliding molecule into kinetic energy of the impact mass. Various devices including, piezoelectric, electromagnetic and electromotive force generators, are used to convert the kinetic energy of the impact mass into electromagnetic, electric or thermal energy.

Abstract: A system is disclosed which accomplishes a method of providing backup power to a device in a facility. The method includes using turbines to combusting a fuel to generate a primary power source. If this source fails, a secondary source of power is obtained from a commercial utility. If the commercial utility is not available, power is generated by a proton exchange membrane. Proton exchange membranes generate power by noncombustibly consuming hydrogen. Capacitors are used to maintain power when the system switches between energy sources.

Abstract: There is disclosed a system comprising a compact, AC operated auxiliary heating and air conditioning unit operable in the cabin of a transport vehicle and powered by the an auxiliary power unit (“APU”). The system includes control means coupled to the auxiliary heating and air conditioning unit and the APU, and harness means for coupling the auxiliary heating and air conditioning unit, the APU, and the control means together.

Abstract: The system comprises a main combined generating module which can be supplied with a flow of a fuel and which can generate electrical energy and thermal energy in the form of a flow of at least a first hot fluid, preferably water. The main module has an electrical output terminal or node which can be connected directly to electrical user appliances and which can also be connected in parallel with an external electrical generating and distribution network by means of a controlled switching device.

Abstract: The present invention is a mobile-energy generating system capable of providing redundant direct current power. It comprises a reciprocating engine and generator having dual fuel capability, a fuel cell, commercial electrical power hookups, and capacitors used for bridging purposes. Back-up fuel for the engine and fuel for the fuel cells are stored in propane and hydrogen storage tanks, respectively.

Abstract: A combined heat and AC power generating system is disclosed having black start capability for the full time, simultaneous production of both electricity and heat. Heat generated within the system is captured and used for heating applications such as heating building air and tap water. The power generating system comprises an engine, generator, rectifier, variable frequency drive inverter, and inverter control electronics. The system provides improved efficiency and prolonged engine life by always operating the engine with its throttle fully open to obtain maximum efficiency and the engine is normally operated near its stall point. In this operating state the inverter control electronics adjust the power output from the inverter to control the speed of the engine. This is done by increasing the power output from the inverter when the power drawn by the load decreases. This causes the engine to operate closer to its stall point and it slows down.

Abstract: A wind powered turbine with low voltage ride-through capability. An inverter is connected to the output of a turbine generator. The generator output is conditioned by the inverter resulting in an output voltage and current at a frequency and phase angle appropriate for transmission to a three-phase utility grid. A frequency and phase angle sensor is connected to the utility grid operative during a fault on the grid. A control system is connected to the sensor and to the inverter. The control system output is a current command signal enabling the inverter to put out a current waveform, which is of the same phase and frequency as detected by the sensor. The control system synthesizes current waveform templates for all three-phases based on a sensed voltage on one phase and transmits currents to all three-phases of the electrical system based on the synthesized current waveforms.

Abstract: A power generation system includes a power module and an external process module. The external process module may include at least one engine support element. The power module has at least one connection zone, and the external process module has at least one connection zone that is configured to align with the at least one connection zone of the power module. The aligned connection zones of the power module and the external process module permit relatively quick and inexpensive attachment of the external process module to the power module. The at least one engine support element may be an aftertreatment element.

Abstract: A cogeneration system includes an engine, a generator connected to an output shaft of the engine to generate electricity, a heat pump type air conditioner, which uses the electricity generated from the generator, and includes a compressor, a directional valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger, a fluid-heating heat exchanger to heat a fluid, and a waste heat recovering means to supply waste heat of the engine to the heat pump type air conditioner or to the fluid-heating heat exchanger, so that the system exhibits a high energy efficiency.

Abstract: A power plant has a generator that is cooled by hydrogen gas. The power plant has a terminal compartment for housing stator terminals of the generator and conductor connections of a main bus taking electrical power away from the power plant. The power plant has a generator auxiliary equipment compartment that is distinct from the terminal compartment. The generator auxiliary equipment compartment receives tap connections that draw power from the main bus. The main bus comprises isolated phase bus duct, one for each phase. Electrically insulating sealing bushings are located in each phase of the isolated phase bus duct between the connections with the stator terminals and the tap connections to seal against the escape of hydrogen gas from the terminal compartment into the generator auxiliary equipment compartment.

Abstract: An electrical power source is described. The electrical power source derives input power from a compressed gas which is fed into a transducer, generating electrical power. The compressed gas may be delivered to the unit by several means including manual pumps, thermal, chemical, or ammunition based sources, or connection to pressurized canisters. Optional power converting and feedback circuits and pneumatic valves serve to convert the raw output power into useful AC and DC output voltages, and to match the rate of power delivery to the applied electrical load.

Abstract: The present invention provides a power generation facility that is adapted to clean large air masses. Air from the environment, which normally contains the most pollutants, is directed into an air flow path through which large quantities of air are directed by a plurality of large diameter fans. The large air flow is directed through electrically insulated cooling fins which cool heated gas from power generators. The electrically insulated cooling fans have a voltage applied thereto and act as electrodes used to produce an electric field that attracts particles such as pollutants. In a preferred embodiment, a charging section is utilized within the air flow prior to the electrically insulated cooling fins to charge the particles with a charge opposite to the voltage applied to the cooling fins to thereby attract the particles to the cooling fins. A cooling fin washing system with pressurized jets is provided in one embodiment to wash the pollutants from the surface of the cooling fins.

Abstract: An electricity generating and air conditioning system including an engine, a generator connected to an output shaft of the engine to generate electricity, an air conditioner, which uses the electricity generated from the generator and includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and an expansion device, and an exhaust gas waste heat recovering device to recover heat of exhaust gas discharged from the engine and to transfer the recovered heat to a refrigerant passing through a discharge line of the compressor. The electricity generating and air conditioning system has an advantage in that an enhancement in heating performance is achieved.

Abstract: In an engine cogeneration system in which power generators 5 to 8 are driven by a plurality of engines 1 to 4 to thereby supply electric power to power load 22 of a general household, at the same time, heat produced by cooling each of the engines 1 to 4 and heat generated from the exhaust gas are recovered by heat exchangers 18 and 19 to be stored as hot water into a hot-water tank 20 to supply heat to heat load 21 of the general household, the amount of power to be supplied and of the amount of heat to be supplied are controlled by a number of the engines 1 to 4 and the combustion modes of these engines 1 to 4. This engine cogeneration system can follow both the head demand and power demand in a high efficiency.

Abstract: The present invention provides a method and apparatus for providing temporary electrical power to stationary locations and moveable locations. For example, vessel marine power systems may be directed to the reduction and elimination of air pollutants produced when using a ship's generator while at dock. The power system is modular, portable, and generates electricity over a wide range of voltages and frequencies.

Abstract: A system for generating electrical energy includes heating a liquid to produce a vapor. The vapor is transported past electron collecting structure which collects electrons from the vapor. Electrons are added to the vapor prior to the vapor reaching the electron collecting structure by an antenna/diode combination.

Abstract: A ferrofluid power generator with micro vortex generator is disclosed, which is capable of generating an induced current by enabling a ferrofluid having a plurality of magnetic particles to flow in a closed circuit, the device comprising a vortex generator and a induced current unit. The vortex generator further comprises a first inlet, a first outlet and a plurality of cavities, which is capable of accelerating the rotation speed of the magnetic particles by virtue of employing the plural cavities to enable the magnetic particles to rotate while the ferrofluid passing through the plural cavities. The induced current unit is substantially a tube having a second inlet and a second outlet, where the second inlet is coupled to the first outlet of the vortex generator for accepting the ferrofluid with rotating magnetic particles to flow therein and through so as to induce a change of magnetic flux to occur and generate an induced current accordingly.

Abstract: The present invention is a generator control system where each generator in the system has an associated controller. Each controller communicates generator data or information with the other controllers in the generator control system. Each of the controllers includes a digital signal processor for analyzing the generator signal from the associated generator and information from the other controllers in the generator control system. The controllers each compare their generator signal with a system average and adjust the associated generator until the generators all supply equal amounts of power to the system.

Abstract: This invention relates to an innovative power supply device for notebook computers, more particularly to a power supply device that can be carried with a notebook computer when computer users are out and unable to access alternate current power supply. The power supply device of the invention primarily uses the heat produced by a microprocessor of the notebook computer during its internal operation and is conducted to a power generator by a heat pipe or simultaneously uses the heat produced by a fuel heat generator and converts it into the required DC power supply by an engine chamber and an electric generator. Then, the direct current power is provided to the notebook computer, so that the notebook computer users no longer need the AC power supply.

Abstract: A system is provided to recover unutilized energy as electric power in hydraulic turbine power generation. The system includes a heat storage tank, a pump for pumping water from the heat storage tank and to air conditioning loads, a first water feed pipe connected between an outlet of the storage pump and the air conditioning loads, and a second water feed pipe for returning the water discharged from the air-conditioning loads. A hydraulic turbine driven generator is provided on a lower portion of the second water feed pipe at such a position as to recover the potential energy of the water discharged from the air conditioning loads.

Abstract: A system for utilizing waste heat to provide power to an electronic device in a data center. The system includes at least one data center component configured to generate heat energy during operation thereof and a converter for receiving the heat energy generated by the at least one data center component. The converter is configured to convert the heat energy to electrical energy. The system also includes a power supply operable to be recharged through receipt of the electrical energy converted by the converter, and where the power supply is configured to deliver the electrical energy to the electronic device.

Abstract: An improved electrical generation system utilizing environmentally hazardous waste oils as a combustible fuel. More particularly, a system to generate electrical power using a Stirling-cycle engine driving an electrical generator. The Stirling-cycle engine is powered by the heat energy produced by a waste-oil-fired furnace. The system is of a co-generation type, producing electricity and a combination of space heating and hot water.

Abstract: There is disclosed an auxiliary power unit (APU) for a transport vehicle powered by an internal combustion engine. An enclosure houses and supports the APU on the transport vehicle. An air-cooled engine within the enclosure directly drives an air-cooled, brushless generator. The generator provides direct, simultaneous AC and DC voltage outputs without requiring an inverter circuit or a converter circuit. Air duct systems within the enclosure separately convey cooling air into, through and out of the air-cooled engine and generator. The cooling air, drawn into the air duct systems by respective direct drive fan means integrated in the air-cooled engine and generator, exits through respective air outlet ducts from the enclosure. In another embodiment, a system is disclosed comprising a compact, AC operated auxiliary heating and air conditioning unit operable in the cabin of a transport vehicle and powered by the APU described above.

Abstract: A system is provided to recover unutilized energy as electric power in hydraulic turbine power generation. The system includes a heat storage tank, a pump for pumping water from the heat storage tank and to air conditioning loads, a first water feed pipe connected between an outlet of the storage pump and the air conditioning loads, and a second water feed pipe for returning the water discharged from the air-conditioning loads. A hydraulic turbine driven generator is provided on a lower portion of the second water feed pipe at such a position as to recover the potential energy of the water discharged from the air conditioning loads.

Abstract: A power generation system including a housing defining a cavity and having an inlet for receiving a fluid that is used to cool and pressurize the cavity and an outlet for removing the fluid from the cavity. The system also may include a rotor having a first end positioned within the cavity of the housing and a second end, a plurality of bearings, positioned to contact the rotor, for providing radial support to the rotor, and a turbine connected to the second end of the rotor. Further, the system may include a heat sink positioned within the cavity and between the housing and the rotor, an electronic component attached to the heat sink, and a reaction chamber for receiving the fluid from the outlet and for producing a substance that is directed to the turbine causing it to rotate.

Abstract: A closed loop system for generating mechanical energy at high efficiencies. The system can have a heating source, a superheater, an expander, a receiver, an absorber, a desorber, and regenerator with pumps and controls. The superheater heats a working fluid (a refrigerant or steam). A positive liquid/vapor expander expands a low temperature refrigerant, or steam vapor to the saturated state (having both liquid and vapor parts) utilizing a low-pressure sub-atmospheric exhaust sink. An absorber, generates a low-pressure sub-atmospheric sink using chemosorption which involves the exothermic reaction/absorption of ammonia refrigerant in water. The desorber is used to reconstitute inlet vapor (for reuse) and the regenerator recovers heat generated by chemosorption. The system can meet electrical power needs for residences, businesses or office buildings. The system can supply electrical energy to power grids, and can be an alternative power generation plants.

Abstract: A micro-generator for providing electrical energy to portable electronic devices and MEMS includes a micro-combustor, a micro-turbine connected to the exhaust outlet of the micro-combustor and a thermoelectric module consisting of a number of quantum well thermoelectric panels connected between spaced heat spreaders, one of which is mounted in thermal communication with the micro-combustor. Different types of hydrocarbon fuel may be supplied to the micro-combustor where it is burned within a combustion chamber. The entire system is controlled in real time by a micro-controller which is powered upon start up by an ultra capacitor and thereafter by the electric energy produced by the thermoelectric module and/or the micro-turbine.

Abstract: In an engine cogeneration system in which power generators 5 to 8 are driven by a plurality of engines 1 to 4 to thereby supply electric power to power load 22 of a general household, at the same time, heat produced by cooling each of the engines 1 to 4 and heat generated from the exhaust gas are recovered by heat exchangers 18 and 19 to be stored as hot water into a hot-water tank 20 to supply heat to heat load 21 of the general household, the amount of power to be supplied and of the amount of heat to be supplied are controlled by a number of the engines 1 to 4 and the combustion modes of these engines 1 to 4. This engine cogeneration system can follow both the head demand and power demand in a high efficiency.

Abstract: A method for producing power from a heat source comprises the steps of: heating an intermediate fluid with heat from the heat source and producing a vaporized intermediate fluid in an intermediate fluid heater/vaporizer. Heat from the vaporized intermediate fluid vaporizes an organic liquid working fluid present in an organic working fluid vaporizer to form a vaporized organic working fluid and intermediate fluid condensate. The vaporized organic working fluid is expanded in an organic vapor turbine for generating power and producing expanded vaporized organic working fluid; the expanded organic vaporized working fluid being condensed to produce an organic fluid condensate with the organic fluid condensate being supplied to the organic fluid vaporizer. According to the present invention, prior to supplying the vaporized intermediate fluid to the organic fluid vaporizer the vaporized intermediate fluid is expanded in an intermediate fluid vapor turbine and power is produced.

Abstract: A power controller controls the turbine of a turbine powered generating system regardless of the load on the system to maximize the efficiency of the turbine and maintains the turbine at a substantially constant temperature during a system load change by using an energy storage device to provide power to the load while the turbine is changing speed to meet the new load demand.

Abstract: A generator positionable on a support surface and including a frame, an internal combustion engine coupled to the frame, an electrical energy source, a fuel tank, and an output unit. The one-piece mounting member is coupled to the frame and has mounting arms that each provide a frame mount, an engine mount, and a source mount. The internal combustion engine is coupled to the mounting member and includes an output shaft that extends through a central portion and that is substantially normal to the support surface during generator operation. The electrical energy source has a rotor coupled to the output shaft for rotation therewith, and a stator coupled to the mounting member. The fuel supply supplies fuel to the engine, and the output unit communicates with at least one of the engine and the energy source.

Abstract: A method for converting lower temperature dissipated heat to other useful energy and apparatus therefore. Heat energy is transferred to a fluid contained within a conduit, and natural convection of the fluid is utilized to transfer kinetic energy of the heat to another type of energy such as electrical energy.

Abstract: A process is provided for producing electrical energy from thermal energy in which charges are separated between two working media triboelectrically or electrostatically, the charges are moved away from one another by displacement of the working media under the action of gas flow forces. In the process, these gas flow forces perform work against the Coulomb forces, and the charges are routed onto electrodes. The process steps are carried out within the inside volume of a heat pipe, with charge separation and charge displacement taking place using the directed gas flow within the heat pipe. The gas flow entrains a liquid medium and routes it past the other working medium for charge separation and displacement. An application of the present invention is in the use of solar energy.

Abstract: A turbine power generator 20 includes a housing 22, a shaft 24, a turbine 26 to drive the shaft, a shaft-driven generator rotor 28, and generator stator 30 within the housing and surrounding the rotor. A main cooling gas blower 32 includes at least one blade 34 driven by the shaft 24 for causing a main flow of cooling gas to cool the rotor 28 and/or stator 30. A supplemental cooling gas blower 36 is connected in parallel with the main cooling gas blower 32 for causing a supplemental flow of cooling gas through the housing 22 in addition to the main flow of cooling gas to cool the rotor 28 and/or stator 30. The supplemental cooling gas blower may include an electric motor 38 and at least one blade 40 driven thereby. A controller 39 may be connected to the electric motor 38 to permit selective operation of the supplemental cooling gas blower 36.

Abstract: Autonomous system for generating electricity comprising energy storage through an inertial flywheel. This system includes an engine/generator assembly having a heat engine, a mechanical speed variator, a clutch, a flywheel and a generator. The assembly composed of the clutch, the flywheel and the generator is placed in an evacuated enclosure so as to reduce energy losses. This system is intended to be installed directly in the buildings where the energy is used, such as for example, in detached houses. The system makes it possible to dispense with a link to the electrical economical in use than the systems of the same type which are already known.

Abstract: A mobile power generation system is provided. The system includes a main trailer having an engine and an electric generator turned by the engine, an air filtration trailer having air filtration equipment for filtering air used as inlet air to the engine, an exhaust trailer having a part of an exhaust silencing system for reducing engine output noise, and an auxiliary trailer having auxiliary equipment for use during operation of the engine.

Abstract: A power system specifically designed to provide reliable electrical power to a telecommunication facility is disclosed. The system includes a number of microturbine generators adapted to provide AC power that is then rectified to DC power by an array of rectifiers. The system is configured so that the microturbine generators are fueled initially by utility-supplied natural gas. In the event the utility-supplied natural gas fails, the system provides propane from a storage tank to fuel the microturbine generators. If both microturbine generator fuel sources fail or their fuel supply becomes exhausted, power is supplied to the rectifiers by a commercial electrical utility. The system also includes a number of hydrogen-powered proton exchange membranes that are operable to supply DC power directly to the facility if both the microturbine generators and the electrical utility fail.

Abstract: A solar driven turbine loop for electricity production and cooling can advantageously be erected in sunny countries. Solar cells (1) with circulating water are heated up to 120°-160° C. (2). Pumped (3) via the superheater (4) f a medium turbine loop to a medium vaporiser (19) and then in return for reheating. A second branch (27) of the hot water is led to accumulators (30-31) for night operations. Superheated medium vapour is forced through a liquid separator (5) to the medium turbine (7) at high pressure and with high energy content. The turbine drives an electric generator (8), possibly also a heating pump compressor (10). If only the electricity generator is driven, an electrically driven heating pump is installed. The medium vapour expands to a lower pressure and the medium energy content in the turbine and condenses in subsequent condenser (13). This with the aid of cool circulating water (38) which was cooled in an air cooled condenser (37).

Abstract: The present invention is an improved power generation facility and method of construction. The improved power generation facility of the present invention provides a low impact implementation suitable for placement in or near a developed, populated area comprising ultimate consumers. The improved power generation facility comprises a foundation; a plurality of legs which form a support structure capable of supporting a plurality of condenser modules with cooling fans of predetermined size; and a housing for containing predetermined power generation equipment, the housing fitting inside the support structure and having a facade which can be made to blend into a surrounding environment's architecture. In a preferred mode, the legs are tricolumn legs that may be removably fastened to each other and to the foundation. Further, the housing may be suspended from the support structure and the plurality of cooling fans situated to minimize noise from the cooling fans.

Abstract: In a generator system having a gas turbine (1) and a generator (2), which is driven by the gas turbine (1), an electricity supply network (5) is supplied from an energy reservoir (6) when the output of the gas turbine (1) is inadequate in the case of a load change. In order to overcome the inertia of the gas turbine (1), energy is additionally supplied from the energy reservoir (6) to the generator (2) which, acting as a motor, accelerates the gas turbine (1) until it at least has the output demanded by the network.

Abstract: A turbine power generator 20 includes a housing 22, a shaft 24, a turbine 26 to drive the shaft, a shaft-driven generator rotor 28, and generator stator 30 within the housing and surrounding the rotor. A main cooling gas blower 32 includes at least one blade 34 driven by the shaft 24 for causing a main flow of cooling gas to cool the rotor 28 and/or stator 30. A supplemental cooling gas blower 36 is connected in parallel with the main cooling gas blower 32 for causing a supplemental flow of cooling gas through the housing 22 in addition to the main flow of cooling gas to cool the rotor 28 and/or stator 30. The supplemental cooling gas blower may include an electric motor 38 and at least one blade 40 driven thereby. A controller 39 may be connected to the electric motor 38 to permit selective operation of the supplemental cooling gas blower 36.