Abstract: A CHP system includes a combustor (heat source), a Rankine cycle apparatus, and a second heat exchanger. The Rankine cycle apparatus includes, as an evaporator, a first heat exchanger that absorbs thermal energy produced in the combustor. The second heat exchanger is located closer to the combustor than is the evaporator, absorbs thermal energy produced in the combustor, and transfers the thermal energy to a heat medium.

Abstract: A cogenerating system includes a Rankine cycle, a high-temperature heat transfer medium circuit, a low-temperature heat transfer medium circuit, a bypass channel, a heat exchanger, and a flow rate adjustment mechanism. The high-temperature heat transfer medium circuit is configured such that an evaporator is supplied with a high-temperature heat transfer medium by a high-temperature heat transfer medium heat exchanger. The low-temperature heat transfer medium circuit is configured such that a condenser is supplied with a low-temperature heat transfer medium by a low-temperature heat transfer medium heat exchanger. The flow rate adjustment mechanism includes at least a flow rate limiter that limits the flow rate of the high-temperature heat transfer medium to be supplied to the evaporator, and adjusts a ratio of the flow rate of the high-temperature heat transfer medium flowing through the bypass channel to the flow rate of the high-temperature heat transfer medium flowing through the evaporator.

Abstract: An evaporator which heats working fluid with high-temperature fluid to evaporate the working fluid includes: a working fluid channel which is arranged in a flow direction of the high temperature fluid and through which the working fluid flows; and a temperature sensor which is provided for the working fluid channel. A part of the working fluid channel is exposed to outside of a housing of the evaporator, and the temperature sensor is provided in the part of the working fluid channel exposed to the outside of the housing of the evaporator in a region other than an inlet of the working fluid channel into which the working fluid flows from the outside of the evaporator and other than an outlet of the working fluid channel through which the working fluid flows out of the evaporator. The output value of the temperature sensor is used to adjust the temperature of the working fluid in the evaporator.

Abstract: A thermal power generation apparatus includes a control circuit that selects a single operation mode from among a plurality of modes including a normal mode and a specific mode on the basis of a voltage in a commercial system. The normal mode is an operation mode in which alternating-current power output from an inverter is adjusted so that a direct-current voltage in a direct-current power line follows a target voltage. The specific mode is an operation mode in which direct-current power absorbed by an electric power absorber and/or the amount of heat per unit time supplied to a heat engine are/is adjusted so that the direct-current voltage follows the target voltage.

Abstract: A Rankine cycle apparatus includes a pump, an evaporator, an expander, and a condenser. The evaporator has a plurality of heat transfer tubes arranged in rows in a flow direction of a high-temperature fluid to be heat-exchanged with a working fluid. The heat transfer tube located in a most upstream row in the flow direction of the high-temperature fluid is defined as a most upstream heat transfer tube. For example, the most upstream heat transfer tube forms an inlet of the evaporator so that the working fluid flows into the evaporator through the inlet and first passes through the most upstream heat transfer tube.

Abstract: A combined heat and power system according the present disclosure includes a Rankine cycle apparatus including an evaporator that heats a working fluid by heat exchange between the working fluid and a heat source medium, an expansion machine that converts expansion power of the working fluid into rotational power, and a condenser that cools the working fluid by heat exchange between the working fluid and a heat medium, and a thermal circuit for using the heat medium heated by the condenser. An expansion volume ratio of the expansion machine is equal to or less than an expansion ratio in a theoretical Rankine cycle determined based on a state of a temperature and a pressure of the working fluid at a discharge port of the expansion machine and a state of a temperature and a pressure of the working fluid at a suction port of the expansion machine.

Abstract: A liquid pump includes: a casing; a feed pipe bringing liquid from outside the casing to inside the casing; a pump mechanism provided in the casing and including a suction hole for sucking in the liquid and a discharge hole for discharging the liquid sucked in via the suction hole; a suction space positioned in the casing on a suction-hole inlet side and making a flow path formed by the feed pipe and the suction hole communicate with each other; and a discharge space positioned on a discharge-hole outlet side in the casing and communicating with the discharge hole. The suction space includes a gas accumulation area that is positioned above a center of an opening at casing-side end of the feed pipe, when viewed vertically and that accumulates gas brought into the casing through the feed pipe together with the liquid to separate the gas from the liquid.

Abstract: A Rankine cycle apparatus includes a pump, an evaporator, an expander, a condenser, and an internal heat exchanger. The internal heat exchanger allows heat exchange to take place between a working fluid discharged from the expander and a working fluid discharged from the pump. A temperature of the working fluid at an inlet of the expander is set so that a temperature of the working fluid at an outlet of the expander be higher than a saturation temperature on a high-pressure side of the cycle.

Abstract: A CHP system includes a combustor (heat source), a Rankine cycle apparatus, and a second heat exchanger. The Rankine cycle apparatus includes, as an evaporator, a first heat exchanger that absorbs thermal energy produced in the combustor. The second heat exchanger is located farther from the combustor than is the evaporator, is in direct contact with the evaporator or in indirect contact with the evaporator via a thermally-conductive member, absorbs thermal energy produced in the combustor, and transfers the thermal energy to a heat medium.

Abstract: A Rankine cycle device in the present disclosure includes an evaporator as a heater, an expander, a cooler, a first temperature sensor, a second temperature sensor, and a control device. The first temperature sensor detects a temperature of the working fluid flowing from an outlet of the heater to an inlet of the expander in the circuit of the working fluid. The second temperature sensor detects a temperature of the working fluid flowing from an outlet of the expander to an inlet of the cooler. The controller controls a number of rotation of the expander based on a difference between a detected temperature of the first temperature sensor and a detected temperature of the second temperature sensor.

Abstract: To improve the reliability of the Rankine cycle device using a sealed-type expansion machine, the Rankine cycle device 100 according to the present disclosure comprises a pump 1, a heater 2, an expansion machine 3, a radiator 5, and a cooling path 8. The expansion machine 3 comprises an expansion mechanism 11 for extracting a power from the working fluid, an electric power generator 12, a sealed container 10 containing the expansion mechanism 11 and the electric power generator 12, a first inlet 34a, a first outlet 35a, a second inlet 30a, and a second outlet 31a. The radiator 5 is connected to the pump 1 with a flow path to cool the working fluid drained from the second outlet 31a. The cooling path 8 which connects the first outlet 35a to the second outlet 30a has a cooler 4 to cool the working fluid drained from the first outlet 35a.

Abstract: A permanent magnet synchronous machine includes a rotor including a core body and an overhang protruding further in an axial direction than a core of a stator. An end surface of the core body includes an N-region disposed on a north pole and an S-region disposed on a south pole. The overhang includes first permanent magnets arranged along an outer edge of the end surface with distances therebetween and a plurality of second permanent magnets disposed on the end surface and adjacent to the first permanent magnets. The first permanent magnets include at least one of a permanent magnet comprising a north pole facing the N-region and a permanent magnet comprising a south pole facing the S-region. The second permanent magnets are provided in the configuration which causes the second permanent magnets to generate a magnetic flux extending from the S-region toward the N-region.

Abstract: An exhaust heat recovery apparatus includes an exhaust heat passage through which a first heat medium holding exhaust heat flows; a second heat medium passage through which the second heat medium, of which temperature is lower than that of the first heat medium, flows; a Rankine cycle which includes a pump, an evaporator, an expander, and a condenser and causes heat exchange at the evaporator between the first heat medium flowing through the exhaust heat passage and a working fluid, so that the working fluid is evaporated, the evaporated working fluid expands at the expander, and power is generated; and an exhaust heat recovery heat exchanger which causes heat exchange between the first heat medium flowing through the exhaust heat passage and the second heat medium flowing through the second heat medium passage, so that the second heat medium is heated and exhaust heat of the first heat medium is recovered.

Abstract: A Rankine cycle apparatus (1A) of the present disclosure includes a main circuit (10), a heat exchange portion (HX), a bypass flow path (20), a flow rate-adjusting mechanism (3), and a pair of temperature sensors (7A). The main circuit (10) is formed by an expander (11), a condenser (13), a pump (14), and an evaporator (15) that are circularly connected in this order. The heat exchange portion (HX) is located in the main circuit (10) at a position between an outlet of the expander (11) and an inlet of the pump (14). The bypass flow path (20) branches from the main circuit (10) at a position between an outlet of the evaporator (15) and an inlet of the expander (11), and joins to the main circuit (10) at a position between the outlet of the expander (11) and an inlet of the heat exchange portion (HX). The flow rate-adjusting mechanism (3) adjusts the flow rate of the working fluid in the bypass flow path (20).

Abstract: A power generation control system includes a converter and a controller. The converter controls a generator of a Rankine cycle system, the Rankine cycle system including an expander, the generator, which is interconnected to the expander, a pump which feeds a working fluid, and an evaporator which evaporates a working fluid. The controller causes the converter to execute, in at least one of a startup operation and a shutdown operation of the Rankine cycle system, first control in at least one of a startup operation and a shutdown operation of the Rankine cycle system such that the expander is prevented from expanding a working fluid if the working fluid at an outlet of the evaporator contains a liquid component while the pump is operating.

Abstract: An air cooling unit is an air cooling unit used in a Rankine cycle system and includes an expander and a condenser. The expander recovers energy from a working fluid by expanding the working fluid. The condenser cools the working fluid using air. The air cooling unit includes a heat-transfer reducer that reduces heat transfer between the expander and an air path.

Abstract: An electricity generation unit 1A includes a combustor 11, a heater 13, and a Rankine cycle circuit 20. The combustor 11 combusts a solid fuel. A combustion gas generated in the combustor 11 passes through a flue 12. The heater 13 contains a heat storage material, and heats the heat storage material by allowing heat exchange to take place between the combustion gas in the flue 12 and the heat storage material. The Rankine cycle circuit 20 has an evaporator 21 that evaporates a working fluid in the Rankine cycle by allowing heat exchange to take place between the heat storage material heated in the heater 13 and the working fluid. With this configuration, stable operation of an electricity generation unit using a combustion gas of a solid fuel is achieved.

Abstract: A heat exchanger is provided which has an easy-to-manufacture structure, is inexpensive, and has high quality and reliability while keeping high heat exchanging performance. The heat exchanger has first substrates (26) having first slits (30) and second slits (40) disposed substantially in parallel, and second substrates (28) having third slits (50) with substantially the same shape as that of first slits (30). The longitudinal length of second substrates (28) is set shorter than that of second slits (40). First substrates (26) and second substrates (28) are stacked so that first slits (30) communicate with third slits (50). First slits (30) and third slits (50) form tube external flow channels (60). Second slits (40) and second substrates (28) form tube internal flow channels (70). The heat exchanging section including only tubes can be formed of substrates having a slit, so that the heat exchanger can be manufactured easily and inexpensively.

Abstract: A heat exchanger is provided which has an easy-to-manufacture structure, is inexpensive, and has high quality and reliability while keeping high heat exchanging performance. The heat exchanger has first substrates (26) having first slits (30) and second slits (40) disposed substantially in parallel, and second substrates (28) having third slits (50) with substantially the same shape as that of first slits (30). The longitudinal length of second substrates (28) is set shorter than that of second slits (40). First substrates (26) and second substrates (28) are stacked so that first slits (30) communicate with third slits (50). First slits (30) and third slits (50) form tube external flow channels (60). Second slits (40) and second substrates (28) form tube internal flow channels (70). The heat exchanging section including only tubes can be formed of substrates having a slit, so that the heat exchanger can be manufactured easily and inexpensively.

Abstract: A heat exchanger is provided which has an easy-to-manufacture structure, is inexpensive, and has high quality and reliability while keeping high heat exchanging performance. The heat exchanger has first substrates (26) having first slits (30) and second slits (40) disposed substantially in parallel, and second substrates (28) having third slits (50) with substantially the same shape as that of first slits (30). The longitudinal length of second substrates (28) is set shorter than that of second slits (40). First substrates (26) and second substrates (28) are stacked so that first slits (30) communicate with third slits (50). First slits (30) and third slits (50) form tube external flow channels (60). Second slits (40) and second substrates (28) form tube internal flow channels (70). The heat exchanging section including only tubes can be formed of substrates having a slit, so that the heat exchanger can be manufactured easily and inexpensively.