JPH04267826A - Air-conditioning system for animal experiment installation - Google Patents

Abstract

PURPOSE:To recover the heat of air discharged from animal chambers without mutually polluting the animal chambers by connecting the water-supplying pipe and the water-returning pipe of a heat exchanger to a water heat source heat pump chiller, the heat exchanger being arranged in an air-discharging duct for discharging the air from the animal chambers. CONSTITUTION:Air-conditioning air is supplied from an air conditioner 63 to respective animal chambers 61 through air-supplying ducts 77, and air in the animal chambers is discharged through airdischarging ducts 85. The air- discharging ducts 85 are collected into an air-discharging duct 91 through high performance dampers 87 and an air-discharging header 89, and a heat exchanger 94 for exchanging heat between the discharged air and water is disposed in the air-discharging duct 91. The water-supplying pipe 95 and the water-returning pipe 96 of the heat exchanger 94 are connected to a water heat source heat pump chiller 98.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system for an animal experiment facility for air conditioning a plurality of animal rooms arranged in parallel in a building constituting the animal experiment facility.

0002

[Prior Art] Conventionally, as an air conditioning system for an animal experiment facility for air-conditioning a plurality of animal rooms arranged in parallel in a building constituting the animal experiment facility, for example,
One disclosed in Publication No. 7 is known. FIG. 4 shows a piping system of an air conditioning system of this kind of animal experiment facility, and in the figure, reference numeral 11 indicates a plurality of animal rooms arranged in parallel in a building constituting the animal experiment facility.

Further, in the figure, reference numeral 13 indicates an air conditioner for cooling or heating outside air.
A preheating coil 19, a humidifier 21, and an air supply fan 23 are arranged. An air supply header 25 is arranged downstream of the air conditioner 13, and one end of an air supply duct 27 that guides the conditioned air from the air conditioner 13 to the animal room 11 is connected to each of the air supply headers 25. There is.

[0004] This air supply duct 27 is equipped with a high-performance damper 2.
9 and a reheating coil 31 are arranged. The other end of the air supply duct 27 passes through a high-performance filter 33.
It opens into each animal room 11. Each animal room 11 has an open end of an exhaust duct 35 for discharging the air inside the animal room 11.

A high-performance damper 37 is arranged in the exhaust duct 35, and the other ends of the exhaust duct 35 are connected to exhaust headers 39, respectively. An exhaust fan 41 is arranged downstream of the exhaust header 39. In such an air conditioning system for an animal experiment facility, the air supply ducts 27 that lead the conditioned air from the air conditioner 13 are opened in each of the animal rooms 11, and the animal rooms 1 and 2 are connected to each animal room 11.
Since the exhaust duct 35 for discharging the air inside 1 was opened,
The air in one animal room 11 does not mix with the air in other animal rooms 11, and contamination between the animal rooms 11 can be effectively prevented.

[0006]

[Problems to be Solved by the Invention] Generally, however, in animal testing facilities, it is necessary to maintain the temperature in the animal room 11 at, for example, about 23° C. and the relative humidity at about 50%. Of the running costs of the experimental facility,
There is a problem in that the cost for cooling or heating the supply air is high.

Therefore, as shown in FIG. 5, it is conceivable to use a rotary total heat exchanger 43 to recover heat from the exhaust gas from the exhaust duct 45, but in this case, the total heat exchanger 43 43, there is a problem that bacteria transfer from the exhaust side to the air supply side and the animal room 11 is mutually contaminated.Furthermore, in order to arrange the total heat exchanger 43, the air supply duct 47 Since it is necessary to gather the exhaust duct 45 and the exhaust duct 45 once, there is a problem in that the architectural fit is restricted.

On the other hand, as shown in FIG.
Heat recovery coils 49, 51 are arranged in the exhaust duct 45, and these heat recovery coils 49, 51 are connected to the water supply pipe 5.
3 and a water return pipe 55 to recover heat from the exhaust air from the exhaust duct 45 using water as a medium. However, in this case, although the above-mentioned problem is solved, there is a problem in that the amount of recovered heat is small, and in particular, the amount of recovered heat in the summer, which greatly affects the determination of the capacity of the air conditioning system, is extremely reduced.

That is, FIG. 7 shows the heat recovery coils 49, 5
This shows the temperature distribution during the summer peak in 1, and the solid line a
is the temperature change of the supply air, solid line b is the temperature change of the exhaust air,
The dotted line shows the temperature change of the water. Further, FIG. 8 shows the temperature distribution in the heat recovery coils 49 and 51 during winter peak hours, where the solid line c represents the temperature change of the supply air, and the solid line d represents the temperature change of the supply air.
The dotted line shows the temperature change of the exhaust gas, and the dotted line shows the temperature change of the water.

[0010] In these figures, the encircled numbers indicate the positions corresponding to the encircled numbers attached to the heat recovery coil. When such temperature distribution is used, for example, the air supply and exhaust amount are 10,000
m3/h, the amount of heat recovered during the summer peak is:
The amount of heat recovered is 12,000 kcal/h, and the amount of heat recovered during the winter peak is 29,000 kcal/h, and the amount of heat recovered during the summer is particularly small.

The present invention solves the above-mentioned problems, and aims to provide an air conditioning system for an animal experiment facility that can obtain a relatively large amount of recovered heat without mutually contaminating the animal rooms. shall be.

0012

[Means for Solving the Problems] The air conditioning system for an animal experiment facility of the present invention provides a
In an air conditioning system for an animal experiment facility, in which an air supply duct for guiding conditioned air from an air conditioner is opened, and an exhaust duct for discharging air from the animal room is opened in each animal room, the exhaust duct is provided with: A heat exchanger for exchanging heat between exhaust gas and water is arranged, and the water supply pipe and water return pipe of this heat exchanger are connected to a water heat source heat pump chiller.

[0013]

[Operation] In the air conditioning system of the animal experiment facility of the present invention, the heat of the exhaust gas is transferred to the water from the water supply pipe in the heat exchanger, and is transported to the water heat source heat pump chiller through the water return pipe. Transferred to other heat carriers in water source heat pump chillers.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 shows an embodiment of an air conditioning system for an animal experiment facility according to the present invention, and in the figure, reference numeral 6
1 shows a plurality of animal rooms arranged in parallel in a building that constitutes an animal experiment facility.

Further, in the figure, reference numeral 63 indicates an air conditioner for cooling or heating the outside air.
A preheating coil 69, a humidifier 71, and an air supply fan 73 are arranged. An air supply header 75 is arranged downstream of the air conditioner 63, and one end of an air supply duct 77 that guides the conditioned air from the air conditioner 63 to the animal room 61 is connected to each of the air supply headers 75. There is.

This air supply duct 77 is equipped with a high-performance damper 7.
9 and a reheating coil 81 are arranged. The other end of the air supply duct 77 passes through a high-performance filter 83.
It opens into each animal room 61. Each animal room 61 has an open end of an exhaust duct 85 for discharging the air inside the animal room 61.

A high-performance damper 87 is arranged in the exhaust duct 85, and the other ends of the exhaust duct 85 are connected to exhaust headers 89, respectively. A collective exhaust duct 91 is arranged downstream of the exhaust header 89, and an exhaust fan 93 is arranged in the exhaust duct 91. Therefore, in this embodiment, a heat exchanger 94 made of a heat recovery coil for exchanging heat between the exhaust gas and water is arranged upstream of the exhaust fan 93 of the exhaust duct 91.

A water supply pipe 95 for supplying water to the heat exchanger 94 is connected to the heat exchanger 94, and a water return pipe 96 for transporting water heat exchanged with the exhaust gas of the exhaust duct 91 is connected to the heat exchanger 94.
is connected. Note that a pump 97 is arranged in the water supply pipe line 95. The water supply pipe line 95 and the water return pipe line 96 are connected to a water heat source heat pump chiller 98.

The water heat source heat pump chiller 98 includes a supply pipe line 99 that supplies cold water or hot water to the water heat source heat pump chiller 98 , and a supply pipe line 99 that supplies cold water or hot water to the water heat source heat pump chiller 98 .
A return pipe 101 is connected thereto for transporting the water heat-exchanged. Note that a pump 103 is arranged in the water supply pipe line 99. In addition, this water heat source heat pump chiller 98
For example, by supplying water at a temperature of 12 to 32° C., the system can be used for cooling or heating, depending on the user's intention.

In the air conditioning system for the animal experiment facility configured as described above, the air supply ducts 77 for guiding the conditioned air from the air conditioner 63 are opened in each of the plurality of animal rooms 61, and Since the exhaust duct 85 for discharging the air in the animal room 61 is opened, the air in one animal room 61 does not mix with the air in other animal rooms 61, thereby preventing contamination between the animal rooms 61. It can be effectively prevented.

[0021] In the air conditioning system for the animal experiment facility configured as described above, a heat exchanger 94 for exchanging heat between the exhaust gas and water is disposed in the exhaust duct 91, and the water supply to the heat exchanger 94 is Since the pipe line 95 and the water return pipe line 96 are connected to the water heat source heat pump chiller 98, the animal room 61
It becomes possible to easily obtain a relatively large amount of recovered heat without mutually contaminating the two.

[0022] In other words, in the air conditioning system for the animal experiment facility configured as described above, the supply air and exhaust air do not mix, unlike when a rotary total heat exchanger is used, so the animal room 61 will not be mutually contaminated. In the air conditioning system for the animal experiment facility configured as described above, a heat exchanger 94 is arranged in the exhaust duct 91,
Since the heat of the exhaust gas recovered by the heat exchanger 94 is conveyed to the water heat source heat pump chiller 98, a relatively large amount of recovered heat can be obtained.

That is, FIG. 2 shows the temperature distribution when the water heat source heat pump chiller 98 is used for cooling and the heat exchanger 94 is used as a destination for releasing waste heat from the water heat source heat pump chiller 98. , the solid line shows the temperature change of the exhaust gas, and the dotted line shows the temperature change of the water. In this case, the water in the water return pipe 96 is supplied to the water heat source heat pump chiller 98.
The exhaust heat is used as cooling water to cool the cooling water.

At this time, the temperature of the water in the water return pipe 96 is
Since the above-mentioned temperature of 32° C. or less is satisfied, it is possible to stably perform the cooling operation of the water heat source heat pump chiller 98. In addition, FIG. 3 shows a water heat source heat pump chiller 9.
8 is used for heating, and the heat exchanger 94 is used as a destination for releasing exhaust heat to the water heat source heat pump chiller 98. The solid line indicates the temperature change of the exhaust gas,
The dotted line shows the temperature change of the water.

In this case, the water in the water return pipe 96 is used as a heat source water for the water source heat pump chiller 98, and the exhaust heat is used as thermal heat to heat the heat source water. At this time, the temperature of the water in the water return pipe 96 satisfies the above-mentioned temperature of 12° C. or higher, so that the heating operation of the water heat source heat pump chiller 98 can be performed stably.

Note that in these figures, the circled numbers indicate the positions corresponding to the circled numbers attached to the heat exchanger 94. That is, the animal room 61 is used 24 hours a day throughout the year, and its exhaust air is
For example, the temperature is always maintained at approximately 23°C and the relative humidity is maintained at approximately 50%, so even if the water source heat pump chiller 98 is used for cooling or heating at will throughout the year, there will be no exhaust gas. It becomes possible to perform heat recovery without any trouble.

When the temperature distribution is as shown in FIGS. 2 and 3, for example, the supply air amount and the exhaust amount are 1000
In the case of 0m3/h, the amount of recovered heat when the water heat source heat pump chiller 98 is used for cooling is 230
00kcal/h, water heat source heat pump chiller 9
The amount of heat recovered when using 8 for heating is 27,000
kcal/h.

That is, compared to the method shown in FIG.
Although the amount of heat recovered for heating is slightly inferior, the amount of heat recovered for cooling can be approximately doubled, making it extremely effective in recovering heat in the summer, when the capacity of the air conditioning system is greatly influenced. becomes possible. Note that there are various purposes for using the water heat source heat pump chiller 98, for example,
The water heat source heat pump chiller 98 is used for cooling in the summer and for heating in the winter, and can be used, for example, to assist in cooling or heating supply air in the air conditioner 63.

[0029] Furthermore, if there is a room in the animal experiment facility that is cooled 24 hours a day, such as a computer room, it is more economical to operate the water heat pump chiller 98 for cooling throughout the year. It becomes possible to use it. Furthermore, the reheating coil 81 requires heat to perform heating throughout the year, and can be used as a heat source for the reheating coil 81 by operating the water heat source heat pump chiller 98 for heating throughout the year.

In the embodiment described above, when the water heat source heat pump chiller 98 is operated for cooling, water is sprayed on the inlet side of the exhaust duct 91 to lower the temperature of the exhaust gas, thereby increasing the amount of recovered heat. It can be increased further.

[0031]

Effects of the Invention As described above, in the air conditioning system for an animal experiment facility of the present invention, a heat exchanger for exchanging heat between the exhaust gas and water is disposed in the exhaust duct, and the water supply pipe of the heat exchanger is and the water return line are connected to the water source heat pump chiller, which has the advantage that it is easily possible to obtain a relatively large amount of recovered heat without mutually contaminating the animal room.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram showing an embodiment of an air conditioning system for an animal experiment facility according to the present invention.

FIG. 2 is an explanatory diagram showing the temperature distribution of the heat exchanger in FIG. 1 in summer;

FIG. 3 is an explanatory diagram showing the temperature distribution of the heat exchanger in FIG. 1 in winter.

FIG. 4 is a piping system diagram showing an example of an air conditioning system for a conventional animal experiment facility.

FIG. 5 is a piping system diagram showing another example of a conventional air conditioning system for an animal experiment facility.

FIG. 6 is a piping system diagram showing another example of a conventional air conditioning system for an animal experiment facility.

7 is an explanatory diagram showing the temperature distribution of the heat recovery coil of FIG. 6 in summer; FIG.

8 is an explanatory diagram showing the temperature distribution of the heat recovery coil of FIG. 6 in winter; FIG.

[Explanation of symbols]

61 Animal room 63 Air conditioner 85,91 Exhaust duct 94 Heat exchanger 95 Water supply pipe 96 Water return pipe 98 Water source heat pump chiller

Claims (1)

[Claims] [Claim 1] In a plurality of animal rooms arranged in parallel in a building,
In an air conditioning system for an animal experiment facility, in which an air supply duct for guiding conditioned air from an air conditioner is opened, and an exhaust duct for discharging air from the animal room is opened in each animal room, the exhaust duct is provided with: Air conditioning for an animal experiment facility, characterized in that a heat exchanger for exchanging heat between exhaust gas and water is arranged, and the water supply pipe and water return pipe of the heat exchanger are connected to a water heat source heat pump chiller. system.