JPH07135010A - Heat removing device for fuel cell power plant - Google Patents

Abstract

PURPOSE:To reduce the volume and space of equipment by utilizing exhaust of a ventilating equipment for cooling air of an air cooler, and integrating the ventilating equipment and a cooling tower to concurrently serves as a fan. CONSTITUTION:The outside air is taken in by a suction fan 8 and partly supplied through a damper 15 into a building 9 receiving a fuel cell power plant 1, and heat generated from the plant 1 is taken to an exhaust fan 10 by air to the with the outside air bypassing the building 9 by the suction fan 8. This exhaust is fed into an exhaust tower 13 through an exhaust silencer 11 and discharged to the atmosphere through a heat transfer element 14 of an air cooler. Here is utilized the exhaust as air cooler cooling air, to perform a heat exchange with exhaust heat water 2 supplied from the plant 1, and the water is returned to the plant 1 as cooling water 4. Thus by utilizing exhaust of a ventilating equipment for cooling air of the air cooler, the ventilating equipment and a cooling tower can be integrated, and the exhaust fan can be used as an equipment concurrently serving in common for the ventilating equipment and the air cooler.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell power plant, and more particularly to a heat removal apparatus for a fuel cell power plant installed indoors or housed in an enclosure.

[0002]

2. Description of the Related Art Generally, a fuel cell power generation plant generates electricity and heat by an electrochemical reaction between hydrogen as a fuel and oxygen in the air. The heat generated from this fuel cell power plant is extracted in the form of steam or hot water, and is often effectively used for air conditioning or hot water supply. However, assuming that there may be cases where there is no heat demand, the plant needs equipment that dissipates the exhaust heat into the atmosphere, rivers, seawater, and the like.

Usually, a method of radiating cooling water in a cooling tower is adopted as equipment that is not restricted by site conditions. In addition to the exhaust heat in the state of steam or hot water, the amount of heat generated from the plant includes heat released from the surfaces of equipment and pipes. With respect to this heat generation, there is no problem because it is released to the atmosphere in the case of a plant installed outdoors, but when it is installed indoors or is housed in an enclosure, ventilation equipment is required to suppress an increase in the ambient temperature of the plant.

Therefore, when the fuel cell power generation equipment is housed indoors or in an enclosure, ventilation equipment is required in addition to the exhaust heat dissipation equipment. FIG. 3 shows a system configuration of a waste heat dissipation facility and a ventilation facility when the fuel cell power plant is installed indoors or accommodated in an enclosure.

In FIG. 3, the waste heat water 2 is introduced from the plant 1 to the cooling tower 3, is radiated by the cooling tower 3, and is circulated and supplied to the plant 1 as cooling water 4. In this case, the temperature of the cooling water 4 is controlled below a certain temperature by adjusting the number of cooling towers 3.

On the other hand, regarding heat generation from equipment and piping,
It is processed by the ventilation equipment described below. That is, the outside air taken in from the intake gallery 5 passes through the intake filter 6 and the intake silencer 7, and is supplied to the building 9 housing the plant 1 by the intake fan 8. The outside air supplied into the building 9 rises in temperature due to the heat generated from the plant 1, passes through the exhaust silencer 11 by the exhaust fan 10, and is discharged from the exhaust gallery 12. In this case, the outlet temperature of the building 9 is controlled below a certain temperature by adjusting the number of intake fans 8 and exhaust fans 10.

[0007]

When the fuel cell power plant is installed indoors or housed in an enclosure in this way, a ventilation tower is required in addition to a cooling tower for exhaust heat dissipation, and the equipment quantity and space are reduced. It will become huge and the number of facilities installed outdoors will also increase.

In particular, the ventilation equipment itself needs to be kept at a relatively low temperature in order to protect the equipment inside the building and maintain the environment of the worker, and the ventilation air volume becomes relatively large compared to the heat generation amount. , The capacity of the equipment and the space will increase. In addition, since the number of facilities installed outdoors is large, it is necessary to take noise countermeasures for each facility, which increases the facility scale and space.

The present invention integrates a cooling tower for exhaust heat dissipation and ventilation equipment to reduce equipment capacity and space, reduce the number of equipment installed outdoors, and further reduce the air cooler in the louver section of the exhaust tower. An object of the present invention is to provide a heat removal apparatus for a fuel cell power plant that can reduce the installation space of an air cooler by installing a heat transfer element.

[0010]

In order to achieve the above object, the present invention is directed to a fuel cell power plant installed in a building or in an enclosure, in which a circulation system is constructed between the plant and the exhaust gas from the plant. A heat dissipation cooler for cooling hot water by heat dissipation, and a ventilation facility for heat dissipation treatment of exhaust gas from the building or enclosure whose temperature has risen due to heat generated from the plant equipment and piping, the exhaust gas passing through the heat dissipation cooler. In addition, the heat transfer element of the air cooler is installed in the louver part of the exhaust tower of the ventilation equipment in the above structure.

[0011]

In the heat removal apparatus of the fuel cell power plant having such a configuration, the exhaust of the ventilation equipment is used as the cooling air of the air cooler so that the ventilation equipment and the cooling tower are integrated. Can be combined. Further, by installing the heat transfer element of the air cooler in the louver portion of the exhaust tower, the heat transfer element of the air cooler also serves as the exhaust tower of the ventilation equipment, so that the installation space of the air cooler can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of the structure of a heat removal apparatus for a fuel cell power plant according to the present invention. The same parts as those in FIG. In FIG. 1, the outside air taken in from the intake gallery 5 is sucked into the intake fan 8 through the intake filter 6 and the intake silencer 7, and a part of the outside air is supplied through the damper 15 into the building 9 housing the fuel cell power generation plant 1. The temperature of the outside air supplied to the building 9 rises due to the heat generated from the plant 1, and the exhaust air is exhausted by the intake fan 8
Further, the building 9 is merged with the outside air bypassed and is sucked by the exhaust fan 10. The exhaust gas sucked by the exhaust fan 10 is sent to the exhaust tower 13 through the exhaust silencer 11, and is exhausted to the atmosphere through the heat transfer element 14 of the air cooler installed in the gallery on the outer periphery of the exhaust tower 13.

The exhaust tower 13 uses the exhaust gas discharged to the atmosphere through the heat transfer element 14 as cooling air for the air cooler, and exchanges heat with the exhaust heat water 2 supplied from the plant 1 to cool the water 4. Is returned to the plant 1.

FIG. 2 is a view showing the appearance of the exhaust tower 13. The exhaust gas whose temperature has risen due to the exhaust heat of the plant rises in the exhaust tower 13 by the exhaust fan 10 and passes through the exhaust silencer 11 to reach the exhaust tower 13. It is designed to be released to the atmosphere through the heat transfer element 14 installed in the gallery on the outer periphery of the.

In the heat removal apparatus of the fuel cell power plant having such a structure, it becomes possible to integrate the ventilation equipment and the cooling tower by utilizing the exhaust air of the ventilation equipment for the cooling air of the air cooler, The exhaust fan can be combined with the ventilation equipment and the air cooler.

Further, the ventilation equipment itself needs to be kept at a relatively low temperature in view of the restriction of the temperature resistance of the equipment in the building and the maintenance of the environment of the worker. Therefore, the exhaust gas temperature of the ventilation is also kept at a relatively low temperature. Therefore, it is possible to use it for the cooling air of the air cooler, and at the same time, to effectively use the ventilation air,
This leads to a reduction in the total heat removal air volume.

Further, by installing the heat transfer element 14 of the air cooler in the louver portion of the exhaust tower 13, the heat transfer element of the air cooler can also serve as the gallery of the exhaust tower.

As described above, according to the above-mentioned embodiment, since the ventilation equipment and the cooling tower are integrated, the exhaust fan can be a common equipment for both the ventilation equipment and the air cooler.
The equipment quantity and space can be reduced. Also,
Since the exhaust gas temperature of ventilation is relatively low, it leads to effective use of ventilation air, reduction of total heat removal air volume, and reduction of equipment capacity and space. Furthermore, by integrating the ventilation equipment and the cooling tower, the number of equipment that is installed outdoors or that requires access to the outdoors is reduced, which is advantageous in terms of site conditions and equipment that requires noise countermeasures. Since the quantity is also reduced, the scale and space of noise control equipment will be reduced. Furthermore, even if there is a slight change in the actual value with respect to the expected value of the amount of heat generated from the piping equipment of the plant, it can be dealt with by adjusting the air volume with a damper. The shortage problem disappears.

On the other hand, by installing the heat transfer element of the air cooler in the louver portion of the exhaust tower, the heat transfer element of the air cooler can also serve as the gallery of the exhaust tower of the ventilation equipment, and the installation space of the air cooler can be reduced.
By the way, the area of the heat transfer element of the air cooler is 11M.
In the case of a W-class fuel cell, it is considerably large, 130 to 180 m ² .

Further, since the heat transfer element of the air cooler also serves as the louver of the exhaust tower of the ventilation equipment, the louver is unnecessary. In the above-mentioned embodiment, as the fuel cell power plant, the exhaust heat quantity taken out in the state of steam and hot water is much larger than the calorific value from the equipment and piping, and the heat exchange temperature of the air in the cooling tower is higher than that in the ventilation equipment. Considering that it is larger, the ventilation side was bypassed because the cooling tower is larger than the ventilation equipment in terms of air volume, but when the air volume is equal, bypass is eliminated, and conversely the ventilation air volume increases. In this case, bypass the air cooler side.

Further, when the heat removal apparatus according to the above-mentioned embodiment and the cooling tower for exhaust heat dissipation are used together and a part of the exhaust heat is removed by the heat removal apparatus, the same operation can be performed. Further, the above embodiment is not limited to the fuel cell power generation plant, and can be used as a heat removal device for any plant that has exhaust heat of cooling water and exhaust heat from equipment and piping, such as a gas turbine.

[0022]

As described above, according to the present invention, the equipment capacity and space can be reduced by integrating the cooling tower for exhaust heat dissipation and the ventilation equipment, and the quantity of equipment installed outdoors can be reduced. Further, it is possible to provide a heat removal apparatus for a fuel cell power plant that can reduce the installation space of the air cooler by installing the heat transfer element of the air cooler in the louver portion of the exhaust tower.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a heat removal apparatus for a fuel cell power plant according to the present invention in FIG.

FIG. 2 is a perspective view schematically showing an exhaust tower in the same embodiment.

FIG. 3 is a system configuration diagram showing a conventional heat removal apparatus for a fuel cell power plant.

[Explanation of symbols]

1 ... Fuel cell power plant, 2 ... Waste heat water, 3 ... Cooling tower,
4 ... Cooling water, 5 ... Intake gallery, 6 ... Intake filter, 7 ...
Intake silencer, 8 ... Intake fan, 9 ... Building, 10 ... Exhaust fan, 11 ... Exhaust silencer, 12 ... Exhaust gallery,
13 ... Exhaust tower, 14 ... Heat transfer element, 15 ... Damper.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshiro Murase 2-30, Kanda Jinbocho, Chiyoda-ku, Tokyo Tokyo Electric Power Co., Inc. Research Laboratory (72) Inventor Masahiro Akiyoshi 1-1-1, Shibaura, Minato-ku, Tokyo No. within Toshiba Head Office

Claims (2)

[Claims] 1. A fuel cell power plant installed in a building or in an enclosure, wherein a circulation system is formed between the plant and a heat dissipation cooler for cooling exhaust heat water from the plant by a heat dissipation effect, and the plant. machine,
A fuel cell, characterized in that the exhaust gas from the building or enclosure whose temperature has risen due to the heat generated from the pipes is integrated with a ventilation facility for radiating the exhaust gas so that the exhaust gas is dissipated through the radiating cooler. Heat removal equipment for power plants. 2. The heat removal apparatus for a fuel cell power plant according to claim 1, wherein a heat transfer element of an air cooler is installed in the louver portion of the exhaust tower of the ventilation equipment. apparatus.