JPH0428941A - Air conditioning system for large-sized structure having roof - Google Patents

Abstract

PURPOSE:To enable an efficient air conditioning to be carried out within a structure and reduce a working cost corresponding to a facility expenditure by a method wherein water pumped up from a storing tank for storing water got from a water collecting device for collecting rain water dropped onto a roof part of the structure is fed into an air conditioning part and this water is utilized as a cold heat source. CONSTITUTION:Rain water dropped at a roof part 1 is collected at a water collecting device 2, passes through a water guiding pipe 2a and is accumulated in a sand settling tank 20. Normally, a valve 2b is open and the rain water is accumulated up to its maximum volume of the sand settling tank 20. When the rain water becomes a height of a specified liquid level, the valve is closed and the rain water passes through a drain container 32 and this water is discharged to a sewage 33. The rain water clarified by the sand settling tank 20 and a next stage filtering tank 21 is stored in the first storing tank 3, supplied to a heat exchanger 5 by a circulation pump 22, cooled or heated and then the water is discharged to the second storing tank 4. Over-cooled (over-heated) water discharged to the second storing tank 4 is sent to an air conditioner 24, cold air (hot air) is generated and then this air is blown to an air conditioning area 25.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioning system for a large-scale roofed structure used for stadiums such as baseball stadiums, concerts, and the like.

[Conventional technology]

Large-scale structures with permeable lightweight roofs are being constructed in various locations. These so-called arena-style structures are divided into spectator seats and competition (acting) grounds, and air conditioning is generally performed mainly in the spectator seats.

Air conditioning in such structures has a configuration similar to that in buildings, and generally a forced air cooling (heat dissipation) machine or a cooling tower is installed outdoors.

[Problem to be solved by the invention]

Many of these conventional facilities use groundwater as a cooling and heating source.In urban areas, there are restrictions on the use of groundwater, so the only available water source is to collect rainfall in underground water tanks. is desired.

However, there are difficulties in using rainfall for air conditioning.

This is something that cannot be done in general buildings such as the 1st and 2nd Buildings, as the amount of heat from precipitation is too small compared to the amount of heat required for air conditioning, which would limit equipment costs. Second, if you want to store water when it rains and use it for air conditioning, you will need a huge water tank, which is impractical in terms of cost. .

The present invention has been made in view of the above-mentioned matters, and provides an air conditioning system for a large-scale roofed structure that can efficiently air condition the inside of the structure and reduce operating costs commensurate with equipment costs. The technical challenge is to do so.

[Means to solve the problem]

The present invention aims to solve the above-mentioned technical problems.The present invention has the following configuration: spectator seats are provided around the ground; In a large-scale structure, there is a water collection device that collects rainwater that falls on the roof of the structure, a storage tank that stores water from this water collection device, and water pumped from this storage tank that is introduced into the air conditioning section. The air-conditioning system for a large-scale structure with a roof is configured so that the water is used as a cold heat source, and the air-conditioning section includes a heat exchanger that cools or heats water in the storage tank, and an air-conditioner connected to the storage tank. The water pumped up from the storage tank may be introduced into a heat exchanger to be cooled or heated by heat exchange, and this water may be used for cooling or heating with an air conditioner.

Also, depending on the temperature of the rainwater, the rainwater can be sent directly to the air conditioner. That is, the air conditioning section can be configured with an air conditioner, and the water pumped up from the storage tank can be directly introduced into the air conditioner.

The air conditioning section is equipped with a heat exchanger and an air conditioner connected to the heat exchanger, and the water pumped from the storage tank is introduced into the heat exchanger and heat exchanged, thereby converting the heat medium of the air conditioner. It may be cooled or heated and may be cooled or heated using an air conditioner.

Moreover, a heat pump is suitable as the heat exchanger.

The present invention can be suitably implemented in a large-scale roofed structure in which the internal volume per square meter of roof area is 100 cubic meters or less, and the volume of the area to be air-conditioned is 1710 cubic meters or less of the total volume.

The ground referred to in the present invention can be used for various sports such as track and field, soccer, rugby, and baseball, or it can be used for swimming by installing a pool, and it can also be used for music concerts, fashion shows, etc. by installing stage equipment. A term that can be used for multiple purposes as a month for various events.

[Effect]

Rainwater that falls on the roof of the structure is collected by a water collection device, stored in a storage tank, and from there is sent to a heat exchanger or air conditioner in the air conditioning section using a pump or the like.

In such a large-scale structure with a roof, the period when heating and cooling is required almost coincides with the period when rainwater is available. It is similar because it is used closed.

In large-scale structures with roofs (play), since the purpose is to host events such as sports and concerts, the roof area is large compared to the internal volume of the structure, and the amount of rainwater concentrated is large, and the internal volume is In comparison, the area that requires air conditioning is small.

Therefore, sufficient air conditioning is possible even with 41 storage tanks, the cost can be reduced more than the equipment investment, and even if rainwater is used as a heating and cooling heat source, the heat balance can be easily achieved.

〔Example〕

Embodiments of the present invention will be described based on FIGS. 1 to 5.

Note that System A of this example is the first system that we would like to implement in a structure whose internal volume is 55 cubic meters per square meter of roof area and where the volume of the area to be air-conditioned is 1/14 of the total volume. Example> This is a large-scale structure with a roof that is surrounded by a peripheral wall 10a and whose upper surface is covered with a roof 1, in which spectator seats 3o are provided around the ground 31. A water collection device 2 that collects fallen rainwater, a storage tank (3, 4) that stores water from this water collection device 2, and water pumped up from this storage tank is introduced into an air conditioning unit and used as a cold source. This is an air conditioning system for large-scale structures with roofs. The air conditioning unit includes a heat exchanger 5 that cools or heats the water in the storage tank, and an air conditioner 24 connected to the storage tank (3, 4), and heats the water pumped from the storage tank 3. The water is introduced into the exchanger 115 and cooled or heated by heat exchange, and the water is used for cooling or heating in the air conditioner 24. Furthermore, the water pumped from the storage tank 3 can be directly introduced into the air conditioner 24 without undergoing heat exchange using the heat exchanger 5.

This will be explained in more detail below.

The roof 1 of the structure has a circular dome shape, and spectator seats 30 and a ground 31 are provided inside the structure, and the roof is supported by a peripheral wall 10a. Spectator seats 30
are arranged like a forest around the ground 31.

Note that it is sufficient that the spectator seats 30 are provided at least in part around the ground 31.

A water collection device 2 is provided below the peripheral portion of the roof 1 to collect rainwater that has fallen onto the roof 1 portion. This water collection device 2 is a circular groove shaped along the circumference of the roof 1, and water guide pipes 2a are connected at predetermined intervals to allow rainwater to fall naturally.

The lower end of this water conduit 2a is connected to a sand settling tank 20 via a valve 2b.
A bypass pipe 2C is connected to the upper part of the valve 2b. This valve 2b is provided with a water level regulator, which automatically shuts off the liquid flow when the liquid reaches a predetermined level.

The tip of the bypass pipe 2c is connected to a drainage basin 32. This drainage basin 32 is connected to a sewer 33.

On the other hand, a filter tank 21 is located next to the sand settling tank 20, and the water settled in the sand settling tank 20 is introduced into the filter tank 21 and filtered. A first storage tank 3 is provided next to the filter tank 21, and the filtered rainwater is stored there.

A pumping pipe having a circulation pump 22 is connected to this first storage tank 3, and the pumped rainwater is sent to a heat exchanger 5 for producing hot and cold water. This heat exchanger 5 is provided with a drain pipe 23 from which water cooled or heated by the heat exchanger 5 is drained and stored in the second storage tank 4. The second storage tank 4 and the first storage tank 3 are in communication with each other, and rainwater is sequentially circulated through the first storage tank 3, the heat exchanger 5, and the second storage tank 4 by the circulation pump 22.

Since a general heat pump is used as the heat exchanger 5, a description of its internal structure will be omitted, but here, supercooled water (or superheated water) from heated rainwater is sent to the air conditioner 24. As a result of the heat exchange, cold air (or warm air) is blown out to the air conditioning area 25.

An example of operation will be explained below.

First, rainwater falling on the roof 1 is collected by the water collection device 2, passes through the water pipe 2a, and is stored in the sand settling tank 20. Normally, the valve 2b is open and rainwater is stored up to the maximum capacity of the settling tank 20, but when the liquid level reaches a constant level, it is shut off and the rainwater is discharged to the sewer 33 through the drainage basin 32. The rainwater purified in the sand settling tank 20 and the next filter tank 21 is stored in the first storage tank 3, fed to the heat exchanger 5 by the circulation pump 22, cooled or heated, and then discharged to the second storage tank 4. Ru. The supercooled water (superheated water) discharged into the second storage tank 4 is transferred to the air conditioner 24.
Cold air (warm air) is generated and blown out to the air-conditioned area 25.

Note that the first storage tank 3 is provided with a temperature sensor that detects the temperature of rainwater. If the rainwater has enough heat for air conditioning, the rainwater will not be sent to the heat exchanger 5 but will be sent directly to the air conditioner 24. It is used as a cold source.

The device is available throughout the year. In other words, dehumidifying operation is indispensable during the rainy season and summer due to the high temperatures. At this time, after generating cold air with an air conditioner, it is sufficient to mix it with warm air and blow it as needed, and the amount of heat required is Much of this can be covered by precipitation.

On the other hand, in spring, warm air can be obtained by operating in the opposite direction.

Second Embodiment By the way, if this device is implemented in a structure with an opening/closing roof, further energy savings can be achieved throughout the year. That is, although the indoor temperature rises in the summer, we generally cannot expect much rainfall.

In such cases, structures with retractable roofs can be opened to allow ventilation and eliminate the shortage of air conditioning water. Moreover, this allows the first storage tank 3 and the second storage tank 4 to have small capacities, thereby reducing construction costs.

A specific example of this will be explained with reference to FIGS. 2 and 3.

An opening IC is formed in the center of the roof 1, and a rail is laid from this opening IC to the edge of the roof.

On this rail, movable roofs 1a and 1a made of a structure and a translucent material, and movable roofs 1b and 1b made of a structure and an opaque material are slidably placed. Each of these movable roofs has a semicircular shape, so that sealing and opening can be selected by selectively covering the opening IC as shown in FIG. The operation of the air conditioning system itself is the same as that of the previous embodiment, so a description thereof will be omitted.

<Third Embodiment> In this embodiment, the arrangement position of the movable roof in the second embodiment is changed as shown in FIG. As shown in the figure, the opening IC can be opened and closed by rotating 174 times. In addition, the fulcrum S + L, movable roofs 1a and la are common, and movable roofs 1b and Ib are common.

Fourth Embodiment As shown in FIG. 5, this embodiment differs from the third embodiment in that the movable roofs 1a and 1b have a common fulcrum S.

<Fifth Embodiment> As shown in FIG.
An example in which the water pumped from the storage tank is introduced into the heat exchanger 5 and heat exchanged to cool the heat medium of the air conditioner 24 or to cool or heat the heat medium with the heating fox air conditioner 24. It is.

The other parts are the same as those in the first embodiment, and their explanation will be omitted.

An example of operation will be explained below.

First, rainwater falling on the roof 1 is collected by the water collection device 2, passes through the water pipe 2a, and is stored in the sand settling tank 2o. Normally, the valve 2b is open and rainwater is stored up to the maximum capacity of the settling tank 20, but when the liquid level reaches a constant level, it is shut off and the rainwater is discharged to the sewer 33 through the drainage basin 32. The rainwater purified in the sand settling tank 20 and the next filter tank 21 is stored in the first storage tank 3, and then sent to the pump 22 for heat exchange [5].After being used for heat exchange, it is transferred to the second storage tank 3. It is discharged at 4.

Then, the supercooled water (superheated water) obtained by the heat exchanger 5 cools or heats the heat medium of the air conditioner 24 , and cold air (warm air) is generated by this heat medium and blown into the air conditioning area 25 .

During cooling operation, a large amount of hot water is obtained in the second storage tank 5 through heat exchange, making it possible to supply hot water to showers, swimming pools, etc.

On the other hand, since cold water can be obtained through heat exchange during heating operation, it can be applied to the refrigeration of foods, etc.

〔Effect of the invention〕

According to the present invention, rainwater can be efficiently used as a heating and cooling heat source, the heat balance is balanced, and air conditioning can be efficiently performed in a structure having a large roof area relative to the internal volume. Also,
Sufficient air conditioning can be achieved even if the storage tank is reduced by 1 inch, making it possible to reduce costs by more than the equipment investment.

[Brief explanation of drawings]

1 to 5 show embodiments of the present invention. FIG. 1 is a cross-sectional view of the first embodiment. FIG. 2 is a perspective view of the second embodiment.
The figure is a plane diagram for explaining the operation. Figure 4 is a plane diagram of the third embodiment. Figure 5 is a perspective view of the fourth embodiment. Figure 6 is a sectional view of the fifth embodiment. ... Roof, 2. Water collection device, ... First storage winding 4... Second storage tank, ... Heat exchanger as air conditioning section, Oa... Peripheral wall, 4... Air conditioner as air conditioning section , 0...ground, 31...spectator seats.

Claims (5)

[Claims] (1) In a large-scale structure with a roof, which has spectator seats around the ground, is surrounded by a peripheral wall, and has a roof covering the top surface, the rainwater that falls on the roof of this structure is collected. An air conditioning system for a large-scale roofed structure that includes a water device, a storage tank that stores water from the water collection device, and the water pumped up from the storage tank is introduced into the air conditioning unit and used as a cold source. (2) The air conditioning unit includes a heat exchanger that cools or heats water in the storage tank, and an air conditioner connected to the storage tank,
The large-scale roofed structure according to claim 1, wherein the water pumped from the storage tank is introduced into a heat exchanger and cooled or heated by heat exchange, and this water is used for cooling or heating with an air conditioner. Air conditioning system. (3) The air conditioning system for a large-scale roofed structure according to claim 1, wherein the air conditioning unit is configured to directly introduce water pumped up from a storage tank into the air conditioner. (4) The air conditioning unit includes a heat exchanger and an air conditioner connected to the heat exchanger, and cools the heat medium of the air conditioner by introducing the water pumped from the storage tank into the heat exchanger and exchanging heat. 2. The air conditioning system for a large-scale roofed structure according to claim 1, wherein the air conditioning system is configured to cool or heat the roofed large-scale structure with an air conditioner. (5) The above-mentioned large-scale structure with a roof is a structure with an internal volume of 100 cubic meters or less per square meter of roof area, and in which the volume of the area to be air-conditioned is 1/10 or less of the total volume. The air conditioning system for a large-scale roofed structure according to claim 1.