Heat pipe cooling of large electric motors

by P. J. Marto

Publisher: Naval Postgraduate School, Publisher: Available from National Technical Information Service in Monterey, Calif, Springfield, Va

Written in English
Published: Downloads: 499
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  • Electric motors

Edition Notes

Other titlesNPS-69-88-012PR.
StatementP.J. Marto, A.S. Wanniarachchi
ContributionsWanniarachchi, Amarawansa, Naval Postgraduate School (U.S.). Dept. of Mechanical Engineering
The Physical Object
Pagination1 v. (various pagings) :
ID Numbers
Open LibraryOL25496864M

Cooling air is blown over the totally enclosed motor surface by an separately excited fan motor. IC 37 Enclosure IP 44 - IP 55 (type G..Z) Double pipe ventilated (TEPV) Cooling air is blown across the motor through a pipe connecting by means of a separate customer provided external blower fan and discharges on the other side’s pipe connecting. The simplest internal combustion engine cooling systems do not involve coolant – they are air-cooled. Rejecting engine heat directly to the surrounding air greatly simplifies its removal from the engine, and eliminating heat exchangers from the heat flow path greatly reduces inefficiencies that can limit system performance. Air-cooled.   For example, if a hp motor has an unbalance factor of 3 percent, the motor should be derated to or 88 percent of capacity, 88 hp. The frequent use of variable frequency drives (VFDs) can result in detrimental effects to electric motors because of the condition of power in manufacturing facilities. what is the correct order of flow in the cooling cycle of an air source heat pump Comp, Reversing valve, outdoor coil, indoor tev, indoor coil, reversing valve what is responsible for shifting the position of the sliding cylinder of the reversing valve.

  Basically, all losses end up as heat, including friction, windage, core and winding. So just use the efficiency of the motor. A hp motor that has an efficiency of 90% requires about hp of input energy (at full load). It will deliver hp to the shaft and dissipate about 11 hp (kW)as heat. It gets a little more complicated at. Hobbywing Ezrun 5V C4 Cooling Fan & 44 x 65mm Motor Heat Sink System RC Motor Fan For 1/8 Car# Blue,Get funshobby decal out of 5 stars 69 1 offer from $ Heat gain from electric motors: HP: kW: Motor Type: Nominal Rpm: Full Load Motor Efficiency: Location Of Motor & Driven Equipment: Motor:in: Motor:out. An earth cooling tube, also known as an earth tube, is a long, underground metal or plastic pipe through which air is drawn. As air travels through the pipe it gives up some of its heat to the soil, and enters the house as cooler air. In the s and early s, earth cooling tubes received a great deal of attention from architects, builders.

Thermal motor model The analysis of the thermal state of the engines allows us to estimate the degree of its power loading. If the analysis shows that the heating of the engine is close to or equal to the normative one, this indicates a good use of the engine power, i.e., the efficiency and cos of such an electric motor are the best.   In normal motoring mode, most electric motors operate through the interaction between an electric motor's magnetic field and winding currents to generate force within the motor. In certain applications, such as in the transportation industry with.   Results from Celsia’s online heat pipe performance calculator show the power-handing capacities for various diameter heat pipes. For heat pipes with the room for a thicker wick (4 to 10 mm), the. Liquid-Cooled Motors Keep Cool – Even at the Highest Performance Levels. Compared with air-cooled motors, liquid-cooled electric motors have many advantages which compensate for the cost of the additional cooling. The Liquid-cooling enables the designer to build motors which are distinguished by very high performance levels.

Heat pipe cooling of large electric motors by P. J. Marto Download PDF EPUB FB2

NPSPR NAVALPOSTGRADUATESCHOOL Monterey,California PROGRESSREPORT HEATPIPECOOLINGOF LARGEELECTRICMOTORS rachchi December   Heat pipe cooling of large electric motors by Marto, P. J.;Wanniarachchi, Amarawansa. Publication date Topics ELECTRIC MOTORS. Publisher some content may be lost due to the binding of the book.

Addeddate Call number a Camera Canon EOS 5D Mark II Contributor_corporatePages: Full text of "Heat pipe cooling of large electric motors" See other formats NPSPR NAVAL POSTGRADUATE SCHOOL Monterey, California PROGRESS REPORT HEAT PIPE COOLING OF LARGE ELECTRIC MOTORS P.J.

Marto A.S. Wanniarachchi December Project Report for the period 1 October - 30 September 19 Prepared for David Taylor. power density, high reliability, and low cost electric motors with superior performance. One of the efficient ways to dissipate the heat generated in the electrical motor is by using extended surfaces (i.e.

heat sinks). These surfaces are extruded from the motor casing and air is forced though them by a cooling : Mohammed Almaghrabi. Totally Enclosed Force (Pipe) Ventilated (TEFV,TEPV, e.g.

IC) Where cooling water is not available, Ecodyne can evaluate the use of Air Cooled Heat Exchangers (ACHE) to reach the required cooling water temperature. For large motors this can often be a more compact and economical solution than Totally Enclosed Air-To-Air Cooled (TEAAC) motors. Depending on the application, cooling systems can be employed with natural convection (totally enclosed non-ventilated), forced convection (air or liquid cooling), or radiation cooling (in the case of electrical machines, operating in vacuum environment), [1].

The thermal analysis of an electric motor is generallyFile Size: 1MB. The heat pipe spreads the heat load over a relatively large areaheat sink, where the heat flux is so low that it can be effectively dissipatedthrough the notebook case to ambient air.

The heat sink can be the existingcomponents of the notebook, from Electro-Magnetic Interference (EMI) shieldingunder the key pad to metal structural components. Cooling is necessary to continuously transfer the heat to a cooling medium, such as the air.

The different methods of cooling rotating machines are classified in the standards IEC and AS For AC induction motors, cooling air is usually circulated internally and externally by one or more fans mounted on the rotor shaft. To allow for. Small electric motors simply have cooling fins on the outside of the motor frame.

Larger machines generate much more heat, and direct cooling of the individual components is required. Direct (primary) cooling is provided by passing air through passages within the.

Electrical motors in air condition systems contributes to the heat loads in air condition systems and will influence on the dimensions of cooling equipment.

Heat loads from electrical motors and fans in different locations can be estimated from the table below. RE: Heat Gain from Electric Motors CHD01 (Mechanical) 17 Jun 03 illiput is correct, I was thinking of the classic definition of motor efficiency used for pumps where motor efficiency is defined as a measure of how effectively the motor turns electrical energy into mechanical energy - so did forget to include energy losses for KVA input.

Owng et al. through the patent numbered US B2, published on February 5,entitled “Electric Motor Having Heat Pipes,” claimed an invention of the electric motor cooling using straight heat pipes. They put the heat pipes around the motor shaft, the condenser of the heat pipes is placed on the by: For many power-dense machines such as electric racing cars, forced convection liquid cooling [16,17], spray cooling [18] and heat pipes coupled to a heat.

An air-cooled VFD cooling system is self-contained. There are no pumps, hoses, piping, filters, deionizers, or heat exchangers. Servicing/support of the client’s HVAC system is more readily available.

When applied for starting duty only, smaller VFDs can often be applied to large motors on a short time rating. Disadvantages. Heat Pipe Shell or Containment Vessel. Heat pipes can be constructed from a variety of different materials.

Aavid has constructed heat pipes from aluminum, copper, titanium, monel, stainless steel, inconel and tungsten. The most common for electronics cooling applications is copper. Example - Heat Loss from an Electric Motor. The heat loss from an electric motor supplied with 10 kW can with the heat loss watts/kW from the table above be calculated as (10 kW) ( watts/kW) = watts = kW.

The rest of the energy (10 kW) - (kW) = kW. is output mechanical energy. One method of cooling these very large machines is a heat exchanger. Large ac and dc motors operating in tough environments have been cooled with heat exchangers for years.

This technology is now available in the subhp range. Without the use of a heat exchanger, a typical TEBC motor provides less than half of the horsepower of the equivalent frame in a DPFV motor. With a heat exchanger. A heat pipe is a heat-transfer device that combines the principles of both thermal conductivity and phase transition to effectively transfer heat between two solid interfaces.

At the hot interface of a heat pipe a liquid in contact with a thermally conductive solid surface turns into a vapor by absorbing heat from that surface. The vapor then travels along the heat pipe to the cold.

Encased electric motor employing gas as heat dissipating means USA (en) * Matsushita Electric Industrial Co., Ltd. Rotating electric motor with reduced cogging torque USA (en) * U.S.

Philips CorporationCited by: Two heat pipes variations were used and attached to the outer surface of the electric motor, 4 and 6 heat pipes arrangements, respectively.

The. Heat Pipes are one of the most efficient ways to move heat, or thermal energy, from one point to another. These two-phase systems are typically used to cool areas or materials, even in outer space.

Heat pipes were first developed for use by Los Alamos National Laboratory to supply heat to and remove waste heat from energy conversion systems.

Electric motors are used in machines and processes all around us. You can find them in factories, automobiles, airplanes, robots and even your favorite DVD vending machine.

Regardless of the application, managing heat dissipation is a common theme. Electric motors are often selected based upon a particular work or load requirement. One consideration of this selection process is managing heat. Capillary driven heat pipes have been investigated for range of thermal control applications in the automotive sector [22,23].A heat pipe can transfer heat at orders of magnitude higher than a similar size of solid metal rod, without the use of moving parts [, ].For electronic devices such as LED headlamps and LCD displays, heat pipes can be invariably used to transfer, spread and Cited by: Pipe-mounted 10 Sump and well 10 Condensate 15 Reciprocating engines 20 Steam turbines 30 Electric motors 18 Motor starters 17 Electric transformers 30 Controls Pneumatic 20 Electric 16 Electronic 15 Valve actuators Hydraulic 15 Pneumatic 20 Self-contained Kim et al.

[44] presented the heat pipe cooling technology for CPU of desktop PC. They had developed a cooler using heat pipe with heat sink to decrease the noise of the fan. Results showed that the usage of heat pipe for desktop PC CPU cooling would increase the dissipated heat without the need for high speed : Mohamed H.A.

Elnaggar, Ezzaldeen Edwan. Electric motor generated the heat from inductance the temperature is important factor to ensure the electric motor can operated smoothly without any problem.

Heat can effected the efficiency of motor,maximum load capacity,duty cycle and winding why heat from motor operation must be controlled by motor cooling. This needs an electric coolant pump that can generate both high flow rates and also high static pressures.

2 phase heat pipes can be used in the system to increase specific heat flux from the relatively small cell tabs and into a lower pressure drop cooling plate or as in the BMW direct expansion of the organic refrigerant. Rotating Heat Pipes can be used to remove heat generated in motors and other rotating machinery, e.g., electric motor/stator heat build-up, gear heat loads, bearing heat generation, etc.

Most shaft are made of steel or stainless steel and have poor thermal conductivity. HVAC Electric Motor Top Selected Products and Reviews Fasco D Inch Refrigeration Fan Motor, 1/20 HP, Volts, RPM, 1 Speed, Amps, OAO Enclosure, CCWSE Rotation, Sleeve Bearing.

frictional heat generated in the bearing (including any externally applied heat) and the amount of heat that can be transported away from the bearing.

Bearing type and size, internal design, load, lubrication and cooling conditions as well as cage design, accuracy and internal clearance all play a part in deter-mining speed Size: KB.

To control ice build-up on a heat pump outdoor coil in the heating cycle, a ____ is attached to a large diaphragm. The heater in the thermostat control circuit in the cooling mode is active when the.

To obtain an accurate reading of a fluid in a large pipe, a technician should____. Use a permanently mounted thermometer in a well. Electric motor performance directly affects the overall performance of an electric vehicle (EV). The electric motor windings heats up when operated under extreme load and hence, reducing the efficiency of the vehicle.

As such, EV propulsion system requires cooling systems, not only to the electric motor but also to the battery banks in order to ensure Cited by: 3.The premise of this book starts on the right note –the challenges of cooling heat flux densities exceeding W/cm 2 (for the record, earlier inthe USAF SBIR program solicited cooling solutions for GaN Power Amp applications exceeding KW/cm 2 heat flux, so this book may soon have a revision!).

The premise of the book also rests on.