JP3291518B1 - Internal combustion engine cogeneration system - Google Patents

Abstract

An object of the present invention is to provide a safe internal combustion engine cogeneration system. SOLUTION: Dry air is produced by a dehumidifying air conditioner 6 having a dehumidifying rotor 7, and the dry and comfortable air is supplied to a room 11, and the air from the room 11 is heated by exhaust heat of a gas turbine 4. The dehumidifying rotor 7 of the dehumidifying air conditioner 6 is desorbed to remove moisture, and the safety valve 17 for stopping the supply of exhaust heat from the gas turbine 4 when the return air outlet 13 from the room 11 is closed by furniture or the like. Was provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, for example, a small moth
And power generation in combination with turbines and generators, further moth
The present invention relates to a cogeneration system for an internal combustion engine that uses waste heat of a turbine .

[0002]

2. Description of the Related Art An internal combustion engine cogeneration system generates electric power by using an internal combustion engine and obtains high thermal efficiency by utilizing waste heat of the internal combustion engine. That is, in the case of an internal combustion engine, particularly a gas turbine, exhaust gas having a high temperature of 200 ° C. or more is discharged. Therefore, hot water is obtained by using the exhaust gas as a heat source of a boiler.

Therefore, the combustion energy of fuel is reduced by 100
%, The electric energy obtained by power generation is about 25% to 35%, but the total energy efficiency is about 70% by using the heat of exhaust gas to supply hot water. It is.

However, when the heat of the exhaust gas is used for supplying hot water, 35% to 4% of the combustion energy of the fuel is required.
5% is converted to heat energy of the supply hot water, and a large amount of hot water is supplied. This large amount of hot water is used for heating and the like in winter, but it is difficult to use it in summer and it is difficult to expect a cogeneration effect in reality.

[0005] To cope with this, an internal combustion engine cogeneration system has been developed in which the heat energy of the exhaust gas of the internal combustion engine is used for a dehumidifying air conditioner. According to this internal combustion engine cogeneration system, the thermal energy of the exhaust gas of the internal combustion engine is used for a long period of time, such as heating in winter, dehumidifying in the rainy season, and cooling in summer, so that the energy of the fuel can be used effectively.

[0006]

As described above, the internal combustion engine cogeneration system utilizing the heat energy of the exhaust gas of the internal combustion engine for the dehumidifying air conditioner has extremely high energy utilization efficiency. Is 200
° C or higher, and there is a problem that an accident may occur if used incorrectly.

The present invention is directed to a safe internal combustion engine cogeneration system in view of the above problems.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is to supply dry air to a room by a dehumidifying rotor and to remove air from the room air by gas.
Was heated in the turbine exhaust heat be one obtained by a driving source of the dehumidifying rotor, gas when the return air path from the chamber is blocked
The supply of exhaust heat from the turbine was stopped.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in claim 1 of the present invention
A dehumidification rotor having a gas turbine and a dehumidification rotor, wherein the dehumidification rotor supplies dry air into the room and heats the air from the room with the exhaust gas of the gas turbine.
The gas turbine exhaust gas is released to the atmosphere when the return air passage from the room is blocked.
This prevents the supply of exhaust heat from the gas turbine , thereby preventing the temperature of the air entering the dehumidifier from becoming abnormally high even if the return air passage from the room is closed for any reason. Has the effect of being able to.

According to a fourth aspect of the present invention, there is provided an internal combustion engine and a heat exchange means, wherein the outside air is passed through the heat exchange means to supply the heated air to the room. by mixing the exhaust gas of the gas and the internal combustion engine so as to provide heat of exhaust gas to the heat exchange means by passing through a heat exchange means, heat supplied from the internal combustion engine when the return air path from the chamber is blocked Is stopped, and even if the return air path from the room is closed for some reason, the temperature of the air entering the heat exchange means can be prevented from being abnormally high.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the internal combustion engine cogeneration system of the present invention will be described below in detail with reference to FIGS.
In FIG. 1, reference numeral 1 denotes a power generation unit, which includes a casing 2 surrounding the entire power generation unit 1, a generator 3, a gas turbine 4, a heat recovery unit R, and the like. Here, the generator 3 is connected to the gas turbine 4 and generates electric power by the rotation of the gas turbine 4. Reference numeral 5 denotes a cooling air fan that sends outside air into the casing 2 and cools equipment inside the casing 2.

Reference numeral 6 denotes a dehumidifying air conditioner, in which a honeycomb-shaped dehumidifying rotor 7 and a honeycomb-shaped sensible heat exchange rotor 8 are provided. Further, an air supply blower 9 and an exhaust blower 10 are provided. That is, outside air is sent to the dehumidifying rotor 7 by the air supply blower 9, and desorbed air is sucked out of the dehumidifying rotor 7 by the exhaust blower 10. A room 11 is supplied with product air.

The room 11 is provided with a product air supply port 12 and a return air outlet 13 which is an outlet for returning air from the room. Reference numeral 14 denotes an exhaust gas pipe for sending exhaust gas from the gas turbine 4 to a desorption zone 15 of the dehumidifying rotor 7. 1
Reference numeral 6 denotes a low-temperature air pipe which removes air after cooling the inside of the casing 2, that is, low-temperature exhaust gas, from the desorption zone 1 of the dehumidifying rotor 7.
5 to send.

Reference numeral 17 denotes a safety valve provided in the exhaust gas pipe 14 from the power generation unit 1. FIG. 2 shows the configuration of the safety valve 17. A flow rate sensor 18 measures the flow rate in the exhaust gas pipe 14, and outputs a signal when the flow rate exceeds a predetermined value. 19 and 20 are electromagnetic dampers.

The electromagnetic damper 19 is provided at an outlet of the safety valve 17 on the desorption zone 15 side of the exhaust gas pipe 14, and the electromagnetic damper 20 is provided at an outlet of the safety valve 17 to the atmosphere. When the flow rate in the exhaust gas pipe 14 exceeds a predetermined value according to the signal of the flow rate sensor 18, the electromagnetic damper 19 is closed and the electromagnetic damper 20 is opened.

The internal combustion engine cogeneration system of the present invention is configured as described above, and its operation will be described below. First, fuel is sent to the gas turbine 4 and the gas turbine 4 is started. As a result, the generator 3 starts power generation. Generator 3
Generates about 28% of the power generated by burning the fuel.

The hot air leaving the turbine T is supplied to the heat exchanger R
The heat exchanges with the air that has exited the compressor C, and the temperature is lowered to about 280 ° C., and the gas exits the power generation unit 1 through the exhaust gas discharge port 6. The exhaust gas that exits from the exhaust gas outlet 6 has about 42% of the energy generated by burning the fuel.

The exhaust gas at 280 ° C. and the air at 60 ° C. which has cooled the inside of the casing 2 are mixed in the desorption zone 15 to become air at about 140 ° C., and pass through the dehumidifying rotor 7 by the blower 10 to desorb. The air at 60 ° C. that has cooled the inside of the casing 2 has about 22% of the energy generated by burning the fuel, and 64% of the energy is used to produce dry air.

The outside air passes through the dehumidification rotor 7 by the blower 9, and the moisture is adsorbed to become dry air, and passes through the sensible heat exchange rotor 8. The dried air exchanges heat with the room air in the room 11 by the sensible heat exchange rotor 8, and the temperature of the dried air is reduced and supplied to the room 11 from the product air supply port 12. The air in the room 11 passes through the return air outlet 13, passes through the sensible heat exchange rotor 8, rises in temperature, and enters the desorption zone 15.

In this way, most of the residual heat generated while generating power in the power generation unit 1 can be used for generating dry air. Therefore, when the cooling device is operated during cooling in summer, the energy consumption can be reduced to about half. In other words, in the summer of Japan, the humidity is high, and the cooling device consumes more than half of the energy to remove the latent heat, but when dry air is supplied to the room by the device of the present invention, the latent heat load is reduced, and significant energy saving is achieved. Can be planned.

Then, it is assumed that the return air outlet 13 is erroneously closed with furniture or the like while using this apparatus. Then, the amount of air passing through the sensible heat exchange rotor 8 and entering the desorption zone 15 decreases. Thereby, the temperature of the desorption zone 15 increases.

On the other hand, the air in the desorption zone 15 is discharged to the atmosphere by the blower 10, and the flow rate of the gas passing through the exhaust pipe 14 is increased by closing the return air outlet 13. Then, the increase in the flow velocity is detected by the flow velocity sensor 18, and the electromagnetic damper 19 is closed and the electromagnetic damper 20 is opened.

As a result, the exhaust gas having a high temperature does not go to the desorption zone 15, but is discharged to the atmosphere, so that an abnormal temperature rise in the desorption zone 15 can be avoided.

Next, a second embodiment of the present invention will be described. FIG. 3 shows a second embodiment of the internal combustion engine cogeneration system of the present invention, in which a power generation unit 1, a casing 2 surrounding the whole, a generator 3, a gas turbine 4, a heat recovery unit R, a cooling air fan 5,
Dehumidifying air conditioner 6, dehumidifying rotor 7, air supply blower 9, exhaust blower 10, room 11, product air supply port 12, return air outlet 13, exhaust gas pipe 14, desorption zone 15, low-temperature air pipe 1
6, safety valve 17, flow rate sensor 18, electromagnetic damper 1
9. The electromagnetic damper 20 is the same as the component of the first embodiment of the present invention described above, and will not be described repeatedly.

Reference numeral 21 denotes an orthogonal sensible heat exchanger for performing sensible heat exchange between the dry air passing through the dehumidifying rotor 7 and the air in the room 11 passing through the return air outlet 13. Further, there is no mixing of the air that performs the sensible heat exchange.
That is, there is no mixing of the air passing through the return air outlet 13 and the air passing through the dehumidifying rotor 7.

Reference numerals 22 and 23 denote switching dampers. The switching damper 22 switches between communicating the low-temperature air pipe 16 to the desorption zone 15 or communicating between the return air outlet 13 and the orthogonal sensible heat exchanger 21. Things. The switching damper 23 has passed the safety valve 17
It switches between communicating the exhaust gas to the desorption zone 15 or communicating between the return air outlet 13 and the orthogonal sensible heat exchanger 21.

[0027] and Figure 3 represents the cooling mode, mixed with room air and desorbing zone 15 that has passed through the both orthogonal sensible heat exchanger 21 the exhaust gas and air passing through the cold air pipe 16 passes through the exhaust gas pipe 14 I do.

In the second embodiment, the outside air passes through the dehumidifying rotor 7 and is dried in the same manner as in the first embodiment. The dried air passes through the orthogonal sensible heat exchanger 21 and is supplied to the room 11 at a reduced temperature. Further, the air in the room 11 passes through the orthogonal sensible heat exchanger 21 and the temperature rises, and the temperature of the air is further increased by being mixed with the exhaust gas and the air of 60 ° C. that has cooled the inside of the casing 2, and is adsorbed on the dehumidification rotor 7 Desorb the moisture.

[0029] If the return air outlet 13 is blocked by the furniture where raises the flow rate in similar exhaust pipe 14 as in Example 1, the electromagnetic damper 19 flow rate sensor 18 to test known to increase the flow velocity Is closed, and the electromagnetic damper 20 is opened. As a result, an abnormal rise in the temperature of the desorption zone 15 can be prevented.

[0030] Figure 4 represents the heating mode, and communicates between the air passing through the exhaust gas and cold air pipe 16 passes through the exhaust gas pipe 14 and the return air outlet 13 both the orthogonal type sensible heat exchanger 21 . Thus, the air passing through the exhaust gas and cold air pipe 16 which has passed through the high exhaust gas pipe 14 of the temperature enters the quadrature sensible heat exchanger 21, the air is carried out and sensible heat exchange that has passed through the dehumidification rotor 7, the temperature To raise.

As a result, the heating air whose temperature has risen is supplied from the product air supply port 12. If it is not desired to dry the air supplied in winter, the operation of the dehumidifying rotor 7 is stopped by stopping the rotation of the dehumidifying rotor 7.

Even in the heating mode, if the return air outlet 13 is blocked by furniture or the like, the exhaust gas
Flow rate rise in 4, it closes the electromagnetic damper 19 flow rate sensor 18 to test known to increase the flow rate, the electromagnetic damper 2
0 opens. This can prevent an abnormal temperature rise of the air entering the orthogonal sensible heat exchanger 21.

[0033]

Since the internal combustion engine cogeneration system of the present invention is configured as described above, if the return air passage is blocked for any reason, exhaust gas from the internal combustion engine stops entering the dehumidifying means. Thus, the temperature inside the dehumidifying means can be prevented from rising abnormally, and safety can be ensured.

As described above, since the safety of the internal combustion engine cogeneration system of the present invention can be ensured, the energy of the exhaust gas of the internal combustion engine can be directly used without being once converted into hot water or the like, and the waste associated with the conversion can be eliminated. Can be. That is, when it is difficult safety when using the heat of exhaust gas of an internal combustion engine, it must be utilized by temporarily heating the water heat of exhaust gas. In this case, only about 70% of the heat of the exhaust gas can be converted into a temperature rise of the water, and only about 70% can be used when the energy of the generated hot water is used to heat the air again. For this reason, the exhaust
Only about half of the thermal energy of the gas can be used.

Further, since the internal combustion engine cogeneration system of the present invention mixes the exhaust gas of the internal combustion engine with the return air from the room and passes it through the dehumidifying rotor, all the energy of the exhaust gas is used for desorption of the dehumidifying rotor. Can be
High energy efficiency.

[Brief description of the drawings]

FIG. 1 is a first embodiment of an internal combustion engine cogeneration system of the present invention.
It is a flowchart which shows.

FIG. 2 is a cross-sectional view showing an example of a safety valve used in an internal combustion engine cogeneration system used in the present invention.

FIG. 3 is a second embodiment of the internal combustion engine cogeneration system of the present invention.
It is a flowchart which shows the cooling mode of.

FIG. 4 is a second embodiment of the internal combustion engine cogeneration system of the present invention.
It is a flowchart which shows the heating mode of.

[Description of Signs] 1 Power generation unit 2 Casing 3 Generator 4 Gas turbine 5 Cooling air fan 6 Dehumidifying air conditioner 7 Dehumidifying rotor 9 Supply air blower 10 Exhaust blower 11 Room 12 Product air supply port 13 Return air outlet 14 Exhaust gas pipe 15 Desorption zone 16 Low temperature air pipe 17 Safety valve 18 Flow rate sensor 19 Electromagnetic damper 20 Electromagnetic damper

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F02G 5/02 F02C 6/18 F24F

Claims (3)

(57) [Claims] 1. A dry air chamber having a gas turbine and a dehumidifying rotor, wherein moisture is adsorbed on the dehumidifying rotor.
Air from the room
Dehumidification rotor is removed by heating with exhaust gas from turbine
Be one obtained by so doing, the gas turbine exhaust air release child when return air path from the chamber is blocked
And thereby stopping the supply of exhaust gas from the gas turbine . 2. The dehumidifying rotor is a honeycomb-shaped dehumidifying rotor.
Der Ru claim 1 engine cogeneration system according. 3. The internal combustion engine cogeneration system according to claim 2, wherein the exhaust gas of the gas turbine and the air from the room are mixed and passed through a dehumidification rotor to desorb the moisture adsorbed by the dehumidification rotor.