Abstract: A heat exchanger for heat exchange between a first fluid and a second fluid is provided with: a body part which is an additive manufactured body and includes a first passage through which the first fluid flows and a second passage through which the second fluid flows; and a covering part attached to the body part. The body part has a first opening portion of the first passage and a second opening portion of the second passage, and the covering part is attached to the body part so as to cover exposure of the first opening portion and the second opening portion.

Abstract: In a header of a heat exchanger core, a header passage includes: at least one radial passage extending along a radial direction, and a plurality of circumferential passages branched from each radial passage and communicating with one or more of the axial passages, respectively. The flow passage area of each radial passage is smaller in a second position than in a first position, where the second position is inward of the first position in the radial direction.

Abstract: A heat exchanger core includes: a first passage row which is formed by a plurality of first passages; a plurality of first dividing walls separating the plurality of first passages from each other; a second passage row which is disposed adjacent to the first passage row and is formed by a plurality of second passages; a plurality of second dividing walls separating the plurality of second passages from each other; and a partition wall located between the first passage row and the second passage row, and separating the plurality of first passages and the plurality of second passages. (a) The partition wall has a greater section modulus in an orthogonal direction than either the first dividing wall or the second partition, or (b) a constituent material of the partition wall has a greater breaking strength than a constituent material of either the first dividing wall or the second dividing wall.

Abstract: There is provided a drain recovery system with which power for driving a feedwater pump can be reduced and the feedwater pump can be driven at low costs. The drain recovery system includes: a buffer tank; an assist tank disposed below the buffer tank; a first drain supply line that connects a load device and the buffer tank; a second drain supply line that connects the buffer tank and the assist tank; a drain supply valve; a communication line that establishes communication between the assist tank and the buffer tank; a communication valve; a steam supply line that supplies steam from a boiler to the assist tank; a steam supply valve; a feedwater line that supplies drain from the assist tank to the boiler; and a feedwater pump.

Abstract: To achieve a downsized drain tank without reducing an effective drain recovery rate. A closed drain recovery system includes: a steam boiler (2); a closed-type drain tank (4); an air-open-type makeup water tank (7); a steam introduction line (10) for introducing a first flush steam within the drain tank (4) to the makeup water tank (7); a surplus drain introduction line (8) for introducing surplus drain to the makeup water tank (7) from the drain tank (4); and condensing units (33) and (39) provided for the makeup water tank (7), and configured to condense one or both of the first flush steam and a second flush steam by bringing the one or both of the first flush steam and the second flush steam into contact with the makeup water within the makeup water tank (7), the second flush steam being generated from the surplus drain.

Abstract: To achieve a downsized drain tank without reducing an effective drain recovery rate. A closed drain recovery system includes: a steam boiler (2); a closed-type drain tank (4); an air-open-type makeup water tank (7); a steam introduction line (10) for introducing a first flush steam within the drain tank (4) to the makeup water tank (7); a surplus drain introduction line (8) for introducing surplus drain to the makeup water tank (7) from the drain tank (4); and condensing units (33) and (39) provided for the makeup water tank (7), and configured to condense one or both of the first flush steam and a second flush steam by bringing the one or both of the first flush steam and the second flush steam into contact with the makeup water within the makeup water tank (7), the second flush steam being generated from the surplus drain.

Abstract: There is provided a drain recovery system with which power for driving a feedwater pump can be reduced and the feedwater pump can be driven at low costs. The drain recovery system includes: a buffer tank; an assist tank disposed below the buffer tank; a first drain supply line that connects a load device and the buffer tank; a second drain supply line that connects the buffer tank and the assist tank; a drain supply valve; a communication line that establishes communication between the assist tank and the buffer tank; a communication valve; a steam supply line that supplies steam from a boiler to the assist tank; a steam supply valve; a feedwater line that supplies drain from the assist tank to the boiler; and a feedwater pump.

Abstract: Even goods of a low price can be handled at a virtual shop and services to the user side are improved. When a payment instruction of certain goods is issued from a user's terminal 1, a paying method presenting unit (21) of a virtual shop (2) presents a paying method using a prepaid type electronic money by the sale on a network (6). When the payment instruction by the prepaid type electronic money is issued from the user's terminal, an electronic money purchasing unit (22) purchases the prepaid type electronic money by using a settlement unit on the network, subtracts a payment money amount of the goods from a money amount of the purchased prepaid type electronic money, and notifies the user's terminal of a balance.

Abstract: A system which improves convenience on the user side and contributes to a cost reduction on the sales shop side is provided. A sales shop 2 manages requested contents to the users by a notice information management unit (22) in correspondence to a URL provided for each user. A requested contents notice unit (23) notifies the user of the requested contents managed by the notice information management unit (22) and the user's URL by Email. When there is an access to the URL in the Email from the user and a paying instruction is issued with respect to the requested contents, a settlement unit (24) makes a settlement on a network (5).

Abstract: An information-processing system includes a phrase category processing unit, a first hypertext document generating unit, a first correlation management unit, a second correlation management unit that manages a correlation between one or a plurality of action categories and the locations of application function units and a selection accepting unit. As a user specifies a phrase in a first hypertext document, the first correlation management unit is engaged to search for an action category corresponding to the phrase category of the phrase. As the user selects an action by using a dialogue component in a second hypertext document provided by the selection accepting unit, the application function unit corresponding to the action category of the action is started up by engaging the second correlation management unit to search for the location of the application function unit.

Abstract: A system which improves convenience on the user side and contributes to a cost reduction on the sales shop side is provided. A sales shop 2 manages requested contents to the users by a notice information management unit (22) in correspondence to a URL provided for each user. A requested contents notice unit (23) notifies the user of the requested contents managed by the notice information management unit (22) and the user's URL by Email. When there is an access to the URL in the Email from the user and a paying instruction is issued with respect to the requested contents, a settlement unit (24) makes a settlement on a network (5).

Abstract: Even goods of a low price can be handled at a virtual shop and services to the user side are improved. When a payment instruction of certain goods is issued from a user's terminal 1, a paying method presenting unit (21) of a virtual shop (2) presents a paying method using a prepaid type electronic money by the sale on a network (6). When the payment instruction by the prepaid type electronic money is issued from the user's terminal, an electronic money purchasing unit (22) purchases the prepaid type electronic money by using a settlement unit on the network, subtracts a payment money amount of the goods from a money amount of the purchased prepaid type electronic money, and notifies the user's terminal of a balance.

Abstract: In a head-mounted display device, image display light emitted from a display device is directed towards the eye of an observer by changing the light path thereof by means of an optical system. The display device, optical system and a drive signal generating device for the display device are worn on the head of the observer by means of a holding member. This optical system is positioned in front of the display device emitting display light in a forward direction from a position separated radially from the visual axis of the observer when looking straight ahead. The drive signal generating device is located in a position separated radially from the visual axis with an interval from the display device and optical system.