Abstract: A fixture assembly for securing at least one side rail to a shroud tile of a gas turbine is disclosed. The fixture assembly may include a first support member, a second support member, a first guide block and a second guide block. The first and second guide blocks may be formed from a material that has the same or a similar coefficient of thermal expansion as the material used to form at least one of the shroud tile and the at least one side rail. In addition, the first and second support members may be formed from a material that has a lower coefficient of thermal expansion than the material used to form the first and second guide blocks.

Abstract: A mid-turbine frame is incorporated into a turbine section of a gas turbine engine intermediate a high pressure turbine and a low pressure turbine. The high pressure and low pressure turbines rotate in opposite directions. The mid-turbine frame carries a plurality of vanes to redirect the flow downstream of the high pressure turbine as it approaches the low pressure turbine. In another feature, a power density is defined as the thrust divided by the volume of a turbine section, and the power density is of about 1.5 lbf per in3.

Abstract: A turbine shroud hanger apparatus for a gas turbine engine includes: an arcuate shroud hanger having at least one cooling hole passing therethrough, the cooling hole having an inlet and an outlet; and a filter carried by the shroud hanger positioned upstream of the inlet of the cooling hole, the filter having a plurality of openings formed therethrough which are sized to permit air flow through the cooling hole while preventing the entry of debris particles larger than a preselected size into the cooling hole.

Abstract: A gas turbine engine typically includes a fan section, a compressor section, a combustor section and a turbine section. A speed reduction device such as an epicyclical gear assembly may be utilized to drive the fan section such that the fan section may rotate at a speed different than the turbine section so as to increase the overall propulsive efficiency of the engine. In such engine architectures, a shaft driven by one of the turbine sections provides an input to the epicyclical gear assembly that drives the fan section at a speed different than the turbine section such that both the turbine section and the fan section can rotate at closer to optimal speeds providing increased performance attributes and performance by desirable combinations of the disclosed features of the various components of the described and disclosed gas turbine engine.

Abstract: A turbine engine system includes a turbine engine shaft, a first rotor, a second rotor and an engine monitoring system. The shaft includes a shaft bore formed by a shaft wall. The shaft bore extends along an axial centerline through the shaft between a first shaft end and a second shaft end. The first rotor is connected to the shaft at the first shaft end, and the second rotor is connected to the shaft at the second shaft end. The engine monitoring system includes a sensor connected to the second rotor, a transmitter arranged at the first shaft end, and a plurality of conduit assemblies. Each conduit assembly includes a conduit that extends axially within the shaft bore and is connected to the shaft wall. A first of the conduit assemblies also includes a wire that extends through a respective conduit and connects the sensor and the transmitter.

Abstract: A gas turbine engine includes a seal assembly that is supported by a member at a joint. The seal assembly includes a seal support having a radial flange secured to the joint. A first bend adjoins the radial flange to a first leg, which is oriented generally in an axial direction. A second bend adjoins the first leg to a second leg, which is conical in shape. A seal is supported by the second leg.

Abstract: A gas turbine engine includes high and low pressure turbines. A mid turbine frame is arranged axially between the high and low pressure turbines. A bearing is operatively supported by a support structure. An inner case is secured to the support structure and includes a first conical member and a bearing support to which the bearing is mounted. The bearing support includes a second conical member that is secured to the first conical member at a joint. The first and second conical members are arranged radially inward of the joint.

Abstract: An annular combustor includes an annular outer shell that includes a first flange that defines an inner diameter IDOS and an annular inner shell that includes a second flange that defines an outer diameter ODIS. An annular hood includes a radially outer hood flange and a radially inner hood flange. A bulkhead includes a radially outer bulkhead flange that defines an outer diameter ODB and a radially inner bulkhead flange that defines an inner diameter IDB. The first flange is secured at a radially outer joint between the radially outer hood flange and the radially outer bulkhead flange. The second flange is secured at a radially inner joint between the radially inner hood flange and the radially inner bulkhead flange. The IDOS and the ODB define a ratio R1 of IDOS/ODB that is 0.998622-1.001129, and the IDB and the ODIS define a ratio R2 of IDB/ODIS that is 0.998812-1.001388.

Abstract: A gas turbine engine includes a very high speed low pressure turbine such that a quantity defined by the exit area of the low pressure turbine multiplied by the square of the low pressure turbine rotational speed compared to the same parameters for the high pressure turbine is at a ratio between about 0.5 and about 1.5.

Abstract: An example method of controlling performance of gearbox of a gas turbine engine includes establishing a gear characteristic of a plurality of double helical gears each disposed about a respective axis in a gearbox. Performance of the plurality of double helical gears is controlled by selecting a circumferential offset distance between a first plurality of gear teeth spaced apart from a second plurality of gear teeth on each of the plurality of double helical gears in response to the established gear characteristic.

Abstract: A gas turbine engine includes a very high speed low pressure turbine such that a quantity defined by the exit area of the low pressure turbine multiplied by the square of the low pressure turbine rotational speed compared to the same parameters for the high pressure turbine is at a ratio between about 0.5 and about 1.5. The high pressure turbine is mounted on the low pressure turbine with an intermediate bearing.

Abstract: A gas turbine engine includes a fan rotatable about an axis, a compressor section, a combustor in fluid communication with the compressor section, and a turbine section in fluid communication with the combustor. The turbine section includes a fan drive turbine and a second turbine. The second turbine is disposed forward of the fan drive turbine. The fan drive turbine includes at least three rotors and at least one rotor having a bore radius (R) and a live rim radius (r), and a ratio of r/R is between about 2.00 and about 2.30. A speed change system is driven by the fan drive turbine for rotating the fan about the axis.

Abstract: A turbine engine includes a compressor section, a combustor section in fluid communication with the compressor section, a high pressure turbine in fluid communication with the combustor, a low pressure turbine in fluid communication with the high pressure turbine, and a mid turbine frame located axially between the high pressure turbine and the low pressure turbine. The mid turbine frame includes an outer frame case, an inner frame case, and a plurality of hollow spokes that distribute loads from the inner frame case to the outer frame case. The spokes are hollow to allow cooling airflow to be supplied through the spokes to the inner frame case.

Abstract: A turbine engine includes a compressor section, a combustor section in fluid communication with the compressor section, a high pressure turbine in fluid communication with the combustor, a low pressure turbine in fluid communication with the high pressure turbine, and a mid turbine frame located axially between the high pressure turbine and the low pressure turbine. The mid turbine frame includes an outer frame case, an inner frame case, and a plurality of hollow spokes that distribute loads from the inner frame case to the outer frame case. The spokes are hollow to allow cooling airflow to be supplied through the spokes to the inner frame case.

Abstract: A magnetocaloric module for a magnetic refrigeration apparatus includes: a bed having an inner surface; a magnetocaloric material filled in the bed; and an insulating layer formed over the inner surface, isolating the magnetocaloric material from the bed. With the use of the insulating layer, thermal conduction between the magnetocaloric material and the bed can be reduced and Galvanic corrosion which may occur to the bed can be prevented. Also, a temperature gradient of the magnetocaloric module may be further extended.

Abstract: Arrangements for heat transfer subsystem interconnection for use in information technology and other heat-producing equipment are disclosed. The arrangements provide for plurality of individual subsystems, each having a thermal interface. These are configured so that two or more of the subsystems can be thermally interconnected by connecting their thermal interfaces. Each subsystem may comprise at least one thermoelectric device capable of acting as a thermoelectric cooler and as a thermoelectric generator. The thermoelectric device can incorporate quantum-process and quantum-well materials for higher heat transfer and thermoelectric generation efficiencies. In some implementations, the thermoelectric device is comprised by the thermal interface. In some implementations, a control system and electronics are used to selectively configure the thermoelectric device in either a thermoelectric cooler operating mode or in a thermoelectric generation operating mode.

Abstract: Temperature control systems and methods can be designed for controlling the interior climate of a vehicle or other the climate of another desired region. The temperature control system for a vehicle can have a thermoelectric system providing heating and/or cooling, including supplemental heating and/or cooling. The thermoelectric system can transfer thermal energy between a working fluid, such as liquid coolant, and comfort air upon application of electric current of a selected polarity. The thermoelectric system can supplement or replace the heat provided from an internal combustion engine or other primary heat source. The thermoelectric system can also supplement or replace cold energy provided from a compressor-based refrigeration system or other primary cold energy source.

Abstract: Temperature control systems and methods can be designed for controlling the interior climate of a vehicle or other the climate of another desired region. The temperature control system for a vehicle can have a thermoelectric system providing heating and/or cooling, including supplemental heating and/or cooling. The thermoelectric system can transfer thermal energy between a working fluid, such as liquid coolant, and comfort air upon application of electric current of a selected polarity. The thermoelectric system can supplement or replace the heat provided from an internal combustion engine or other primary heat source. The thermoelectric system can also supplement or replace cold energy provided from a compressor-based refrigeration system or other primary cold energy source.

Abstract: A system and a method for liquefaction of gases which are utilized in their liquid state as refrigerants in applications that require low temperatures, throughout various pressure ranges, from slightly above atmospheric pressures to pressures near the critical point. The system and method are based on closed-cycle cryocoolers and utilize the thermodynamic properties of the gas to achieve optimal liquefaction rates.

Abstract: A closed cycle cryocooler is thermally connected to an elongated, cup-shaped sample well and cools down the sample well. Gaseous helium at a relatively low pressure is introduced into the sample well so that, as the sample well is cooled by the cryocooler, the gas in the sample well is also cooled. A sample is attached to a sample stick assembly which is then lowered into the sample well where the sample is cooled by the cooled gas to carryout experiments at low temperature. The sample stick assembly is mechanically attached to the spectrometer magnets and a flexible rubber bellows connects the sample stick assembly to the sample well so that vibration generated by the cryocooler is not transferred to the sample.

Abstract: Systems, methods, and devices for integrated detector cooler assemblies (IDCAs) and multi-circuit cryostats are discussed herein. Solutions include using cryostats with multiple cooling circuits. Some cryostat variations may include a rapid cooldown circuit and a temperature maintenance circuit. In some cases, the temperature maintenance circuit may be a closed-loop circuit run by a compressor instead of an open-loop circuit run on a pressurized gas bottle/cartridge. Variations of a cryostat may also include a gas expander portion that replaces the coldfinger of typical IDCAs. Further variations of cooling circuits may include circuits that perform reverse-flow heat exchange to pre-cool incoming refrigerant and also cooling circuits that have heat bridges disposed thereon to assist in such heat exchange.

Abstract: A cryopump includes a housing, an electrical control unit which controls the cryopump, a purge valve provided on a passage between an external purge gas source and the inside of the housing, a rough valve provided on a passage between an external pump and the inside of the housing, a vent valve provided on a passage between the inside and the outside of the housing, and a Pirani gauge which measures a pressure inside the housing. The electrical control unit is connected to each of the purge valve, rough valve, vent valve, and Pirani gauge via a wire. Each of the wires is provided with a connector on the component side and a connector on the electrical control unit side. The connector on the component side is configured to be attachable to and detachable from the connector on the electrical control unit side.

Abstract: A cold trap includes two individually controllable cooling units. The cold trap is provided in an evacuation path for connecting a vacuum chamber to a turbomolecular pump, The first cooling unit includes a first panel unit provided in the evacuation path such that the panel is exposed, and a first refrigerator thermally coupled to the first panel unit so as to cool the first panel unit. The second cooling unit includes a second panel unit provided in the evacuation path such that the panel is exposed, and a second refrigerator thermally coupled to the second panel unit so as to cool the second panel unit. The first panel unit is spaced apart from the second panel unit.

Abstract: The invention relates to a spray crystallization process for making solid particles suitable for structuring an oil containing dispersion, solid particles obtainable by said process and use of said particles for structuring oil containing dispersions.

Abstract: A refrigeration appliance includes a fresh food compartment, a freezer compartment, and an ice maker within the fresh food compartment for freezing water into ice pieces. In one example, a rotatable auger drives the ice pieces out of a removable ice bin via a driving force applied in a first direction. A latch is configured to apply a resisting force to the ice bin along a second direction. In another example, an air mover is disposed within the ice maker for delivering cooled air from an ice maker evaporator to a region adjacent to the ice bin. At least one air channel is formed into an inside surface of the ice maker chamber. In another example, a method of making ice in the refrigeration appliance is provided. The method includes the steps of operating the air mover and a defrost heating of the ice maker evaporator.

Abstract: A refrigerator according to the present invention includes a compressor compressing a coolant, a condenser condensing the coolant compressed in the compressor, an expander through which the coolant condensed in the condenser passes, an evaporator evaporating the coolant expanded in the expander and cooling an inside of the refrigerator, a defroster defrosting the evaporator, a coolant adjusting valve adjusting the coolant flowing from the condenser to the evaporator, and a controller driving the compressor and turning on the defroster after closing the coolant adjusting valve. The refrigerator may minimize power consumed for defrosting and the defrosting time.

Abstract: An adsorption system can be used as part of a climate control system in a vehicle or in any other space requiring heating or cooling.

Abstract: A vehicle air conditioning system includes a compressor, a condenser, an evaporator and a controller. The controller is operatively coupled to the compressor to manage operation of the compressor during a cooling operation that provides temperature reduction of air flowing across heat transferring portions the evaporator. The controller further manages operation of the compressor in a moisture releasing operation in response to termination of the cooling operation. The moisture releasing operation includes, for example, finite operation of the compressor that retards release of moisture from the heat transferring portions of the evaporator.

Abstract: A refrigerant circuit device includes a compressor, a heat exchanger that is capable of exchanging heat between the refrigerant and a heat medium, and other components that are connected by pipes, in which the refrigerant circuit circulates a refrigerant. A heat medium circulating circuit circulates the heat medium in the heat exchanger. At least the compressor is housed in an outdoor unit, at least the heat exchanger is housed in a heat medium relay unit, and an indoor unit is housed in a use side heat exchanger. The outdoor unit, the heat medium relay unit, and the indoor unit are formed separately and can be disposed in separate positions. A housing of the heat medium relay unit has an opening that allows ventilation between the housing space of the heat exchanger related to heat medium and the space outside the housing space.

Abstract: When the temperatures of outdoor heat exchangers 23a and 23b detected by outdoor heat exchanger temperature sensors 57a and 57b become equal to or higher than 5 degrees C. and the sucking superheating degrees of compressors 21a and 21b become equal to or lower than 0 degrees C. while an air conditioning apparatus 1 is performing the reverse defrosting operation, the reverse defrosting operation is stopped and the heating dominant operation is resumed. At this time, the total operating times of the compressors 21a and 21b are reset. The sucking superheating degrees of the compressors 21a and 21b are obtained by subtracting the low pressure saturation temperatures calculated from the sucking pressures of the compressors 21a and 21b, from the temperatures of the refrigerants sucked into the compressors 21a and 21b which temperatures are detected by the sucking temperature sensors 54a and 54b.

Abstract: A refrigerator is provided. The refrigerator includes an evaporator configured to evaporate a coolant and to cool a storage compartment, a compressor configured to compress the coolant evaporated in the evaporator, a condenser configured to condense the coolant compressed in the compressor, a hot line configured to receive condensed coolant, a first capillary tube configured to receive condensed coolant from the hot line, a second capillary tube configured to receive condensed coolant and arranged to allow bypassing of the hot line, a first coolant configured to adjust flow of condensed coolant from the hot line to the first capillary tube and a second coolant adjusting valve configured to control flow of condensed coolant from the condenser to the hot line and the second capillary tube.

Abstract: Disclosed are self-cleaning waste water nitration devices suitable for generating thermal water for use in heat pump systems. Also disclosed are methods for continuously generating filtered thermal water from waste water. Further disclosures pertain to systems for automatically generating heating capacity or cooling capacity from a waste water source. Methods for producing and transporting filtered thermal water from a waste water source to a heat pump are also disclosed in which the filtered thermal water can be used for heating, cooling, or both.

Abstract: An outdoor heat exchanger in cooling operation includes: a first header pipe into which a refrigerant compressed by a compressor flows; a first heat exchanging unit connected with the first header pipe and allowing a refrigerant to exchange heat with the air; a bypass pipe through which the refrigerant exchanging heat in the first heat exchanging unit flows; a first distribution pipe connected with the bypass pipe; a distribution pipe check valve that is disposed in the first distribution pipe and preventing the refrigerant exchanging heat in the first heat exchanging unit from passing through the first distribution pipe; a second header pipe into which the refrigerant passing through the bypass pipe flows; a second heat exchanging unit connected with the second header pipe and allowing a refrigerant to exchange heat with the air; and a second distribution pipe through which the refrigerant exchanging heat in the second heat exchanging unit passes.

Abstract: A contamination control system for ductless air conditioners is disclosed. The contamination control system may be formed from one or more decontamination lamps contained within a tubular housing that is hollow and includes an internal cavity extending from the first end to the second end with at least one longitudinally extending sight window positioned between first and second tubular end regions. The decontamination lamp may be positioned within the internal cavity in the tubular housing. The tubular housing may be held in place with a mounting system including at least one tubular housing receiver in which the tubular housing is secured. The tubular housing is slidably held within the mounting system such that the tubular housing is slidable longitudinally relative to the tubular housing receivers and is rotatable within the tubular housing receivers. The decontamination lamp may be activated with a photo activated sensor.

Abstract: An air temperature adjusting system includes a gas-liquid mixing device (11), a temperature adjusting device (12), a gas-liquid separating device (13) and a gas-liquid circulating device (14) for driving gas-liquid to move among the gas-liquid mixing device (11), the temperature adjusting device (12) and the gas-liquid separating device (13). The gas-liquid mixing device (11) is for absorbing air into liquid to mix the air with the liquid and bringing a mixture of the air and the liquid into the gas-liquid separating device (13) after a temperature of the mixture is adjusted by the temperature adjusting device (12); and the gas-liquid separating device (13) is for separating the air with the liquid, wherein the separated air flows out via the gas-liquid separating device (13).

Abstract: The invention relates to an apparatus for producing flake ice from a liquid, comprising a tub receiving the liquid, a rotatably supported roller which partly dips into the liquid received in the tub, a refrigerating device for cooling the surface of the roller and a scraper for removing ice formed at the surface of the roller from the liquid.

Abstract: A plate heat exchanger includes a plurality of rectangular plates each having, at four corners thereof, inlets and outlets and others for a first fluid and a second fluid. The plates are stacked such that first passages each defined by adjacent two of the plates and through which the first fluid flows and second passages each defined by adjacent two of the plates and through which the second fluid flows are provided alternately. The first passage includes a bypass passage extending from an inlet peripheral portion, which is an area around the inlet, along the outlet for the second fluid up to a long-side-peripheral portion of the plate that is nearer to the second outlet. The bypass passage allows some of the first fluid having flowed therein from the inlet to flow from the long-side-peripheral portion into a heat-exchanging passage.

Abstract: Provided is a refrigerator. The refrigerator includes a cabinet defining a refrigerating compartment and a freezing compartment, a freezing compartment door opening or closing the freezing compartment, and an ice making device disposed on a rear surface of the freezing compartment door. The ice making device includes a case disposed on the freezing compartment door, an ice tray rotatably disposed inside the case, the ice tray making an ice therein, a knob exposed to the outside of the case, the knob being connected to a rotation shaft of the ice tray and rotated by being manipulated from the outside, and an elastic member disposed on the rotation shaft of the ice tray, the elastic member providing an elastic force into the ice tray so that the ice tray is rotated to an original position. Thus, a structure for rotating the ice tray may be simplified.

Abstract: An apparatus for a programmable self sanitizing water dispenser apparatus with a digital controller as well as a programmable method for generating ozone for cleaning the reservoir and the water contained within it. The apparatus includes an anti-spill receiver that houses the controller and that can contain a ozone generator.

Abstract: A compressor control apparatus and method, and a refrigerator including the same, are provided. In a refrigerator having two compressors, starting of two compressors may be staggered to reduce an effect of the suction pressure and discharge pressure between the two compressors, to provide for stable operation of the compressors, and improve reliability and power consumption.

Abstract: Described is a structural unit composed of a heat exchanger and a liquid separator, in particular for separating droplets from evaporated refrigerant, in particular for refrigeration and air conditioning systems, which structural unit is of compact design. According to the invention, in a pressure vessel (1) in which heat transfer plates (2) are arranged in a lower region and in which an upper region as a space for the separation of droplets from evaporated refrigerant is formed above the heat transfer plates (2) as a result of the arrangement of the heat transfer plates (2) in the lower region, the heat transfer plates are arranged substantially parallel to the longitudinal axis of the pressure vessel.

Abstract: A refining system for refining a feed gas (10) includes a first and a second component, the first component having a lower dew point temperature than the second component; the refining system including:—an input section (105) for input of the feed gas including a dehydration unit for dehydrating the feed gas, capable of obtaining a water dew point between ?45 and ?65° C.;—a pre-cooling section (110) coupled to the input section for receiving the dehydrated feed gas;—a fractionation section (115) coupled to the pre-cooling section for receiving the pre-cooled stream;—an expansion cooling and separation section (120) coupled to the fractionation section for receiving the fractionated gas, including a cyclonic separator device (240); the expansion cooling and separation section having an reflux conduit coupled to the fractionation section for reflux (24) of liquid enriched with the second component to the fractionation section.

Abstract: A small scale natural gas liquefaction plant is integrated with an LNG loading facility in which natural gas is liquefied using a multi-stage gas expansion cycle. LNG is then loaded onto an LNG truck or other LNG transport vehicle at the loading facility using a differential pressure control system that uses compressed boil off gas as a motive force to move the LNG from the LNG storage tank to the LNG truck so as to avoid the use of an LNG pump and associated equipment as well as to avoid venting of boil off vapors into the environment.

Abstract: Light naphtha distillation columns with heat pumps and methods of operating them are described. The overhead stream is compressed to increase temperature so that it can be used both to heat the reboiler and to superheat the overhead stream before it enters the heat pump compressor.

Abstract: A process for removing heavy hydrocarbons from a natural gas stream comprises passing the natural gas stream thought a TSA adsorbent unit to adsorb heavy hydrocarbons, regenerating the TSA adsorbent by heating to form a contaminant-containing gas phase, cooling the contaminated gas phase to separate water and heavy hydrocarbon liquids to form a third gas phase and directing the third gas phase to a PSA unit to adsorb heavy hydrocarbons from the third gas phase. The product from the PSA unit can be sent to pipeline or recycled to the TSA unit for further hydrocarbon removal and recovery.

Abstract: The device serves for the cryogenic separation of air. It has the following features: a main heat exchanger and a supercooling countercurrent heat exchanger (2); a distillation column system for nitrogen-oxygen separation (5), which comprises a high-pressure column and a low-pressure column; a mixing column (1); means for introducing charge air via the main heat exchanger into the high-pressure column and into the mixing column; a liquid-oxygen line for introducing liquid oxygen from the low-pressure column into the upper region of the mixing column; an oxygen product line for extracting oxygen gas from the upper region of the mixing column through the main heat exchanger. The mixing column (1) and at least one of the two heat exchangers mentioned (2, 6) are arranged in a common cold box (3).

Abstract: A system and method for air separation using a supplemental refrigeration cycle is provided. A portion of the refrigeration required by the air separation plant to produce a liquid product stream is supplied via a supplemental refrigeration circuit configured to direct a cooled refrigerant produced by the turboexpander through the main heat exchanger of the air separation plant. The refrigeration capacity is controlled by removing or adding a portion of the refrigerant in the supplemental refrigeration circuit to adjust the inlet pressure while maintaining a substantially constant volumetric flow rate and substantially constant pressure ratio across the compressor. Removing the refrigerant from the supplemental refrigeration circuit decreases the refrigeration imparted by the supplemental refrigeration circuit and thus decreases the production of the liquid product stream.

Abstract: Coated crucibles for holding molten material are disclosed. In some embodiments, the crucibles are used to prepare multicrystalline silicon ingots by a directional solidification process. Methods for preparing such crucibles and methods for preparing silicon ingots by use of such crucibles are also disclosed.

Abstract: A process is provided for evaluating oxygen precipitates in a single crystal silicon sample. The process comprises (a) annealing the single crystal silicon sample at a temperature sufficient to selectively grow as-grown oxygen precipitates having a size of about 25 nm or more and selectively dissolve as-grown oxygen precipitates having a size of about 25 nm or less; (b) cooling the single crystal silicon sample at a cooling rate sufficient to inhibit the nucleation of oxygen precipitates having a size of about 25 nm or less; (c) coating a surface of the single crystal silicon sample with a composition containing a metal capable of decorating oxygen precipitates; and (d) annealing the coated single crystal silicon sample at a temperature, for a duration, and in an atmosphere sufficient to decorate the oxygen precipitates in the single crystal silicon sample.

Abstract: An aspect of the invention is directed to a method for manufacturing a glass substrate for an information recording medium including: a polishing step of polishing a surface of a raw glass plate, with use of a polishing solution containing a polishing agent and water; and a chemically reinforcing step of reinforcing the polished surface of the raw glass plate which has undergone the polishing step, with use of a chemically reinforcing treatment solution. The polishing step is a step of using, as the polishing agent, a polishing agent containing CeO2, and of performing polishing in such a manner that the effective amount of CeO2 per unit area of the surface of the raw glass plate to be used in the polishing is in the range of from 0.05 to 0.5 ?g/cm2.