JPS63297949A - Recovering method for surplus energy in air conditioning equipment utilizing heat accumulating tank - Google Patents

Abstract

PURPOSE:To remove the cause of vibration and noise, by a method wherein a mini water turbine is rotationally driven by means of free drop water, and by converting energy of drop water into electric energy by means of a mini generator, surplus energy which water passing through an air conditioner still has is recovered. CONSTITUTION:A heat accumulating tank 1 is built under an underground floor, and water in the heat accumulating tank 1 is cooled by cooling equipment. The cooling equipment comprises an evaporator 2, a condenser 3, a cooling tower 4, and pumps 5 and 6, and pipings necessary thereto are installed. Cold water in the heat accumulating tank 1 is conveyed through a cooling water outbound pipe 8 to air conditioners 9, 9... mounted at building floors with the aid of a pump 7. Water passing through cooling coils 9a and water bypassing 4-way valves 10 are dropped through a cooling water inbound 11 under gravity, and are returned into the heat accumulating tank 1. Mini generators 13 are mounted in a pipe 12 and the cooling water inbound 11, through which water cooled by the evaporator 2, is returned into the heat accumulating tank 1, and energy of free drop water is converted into and recovered as electric energy.

Description

[Detailed Description of the Invention] Technical Field> The present invention recovers excess energy contained in water pumped to various parts of a building in an air conditioning system using a heat storage tank as electrical energy. This invention relates to a method for recovering excess energy in air conditioning equipment using a heat storage tank.

<Prior Art> Conventionally, in air conditioning equipment using a heat storage tank, the heat storage tank is often installed underground. In that case, the cold Φ hot water in the heat storage tank is transported by a pump through the cold and hot water outbound pipes to the air conditioners or fan coil units on each floor of the building, and is heat exchanged in the air conditioners. The cold and hot water that has been air-conditioned in each room is then transported by one gravity drop through the cold and hot main return pipes to the underground heat storage tank.

Water that has passed through air conditioners, etc. has a position head, a pressure head, and a velocity head in various ratios depending on each floor and location of the building, and although this energy is surplus, it is necessary for water circulation. It is unavoidable.

Problems with the above-mentioned prior art> (1) Gravity water is a turbulent flow, and the larger the falling water head, the higher the falling speed and the maximum Reynolds number, which causes the pipe to vibrate more and generates more noise.

For this reason, especially in medium- and high-rise buildings, vibration and noise countermeasures are required for cold and hot main pipe restoration. On the other hand, to prevent vibration, the pipe is fixed with anti-vibration rubber, but to prevent noise, the pipe is insulated with heat insulating material to prevent condensation and a space is provided for the pipe shaft. No active measures have been taken to suppress the increase in flow velocity and eliminate the causes of vibration and noise.

(2) Current medium- and high-rise buildings do not attempt to recover excess energy from the water pumped into each part of the building.

<Object of the invention> The present invention was devised in view of the above-mentioned points, and is a method of recovering excess energy contained in water pumped to various parts of a building in an air conditioning system using a heat storage tank as electrical energy, In addition, this is an active measure to suppress the increase in turbulence velocity when water pumped to various parts of the building falls, and to eliminate the causes of vibration and noise. The purpose is to provide a method for recovering excess energy in air conditioning equipment using a heat storage tank.

Structure of the Present Invention> As shown in FIG. 1, the method for recovering excess energy in an air conditioning system using a heat storage tank according to the present invention is an air conditioning system in which water freely falls through the pipes and returns to the heat storage tank. In this method, a mini-hydroelectric generator is installed in the above-mentioned pipe where the water freely falls, and the energy of the free-falling water is converted and recovered as electrical energy.More details are shown in Figure 2. In this method, a mini-turbine is installed in a chain pipe through which water freely falls, and a mini-generator is directly connected to the rotating shaft of the mini-turbine. By converting it into electrical energy, the excess energy still contained in the water that has passed through air conditioners, etc., is recovered when the water falls, and the water pumped into various parts of the building is also converted into electrical energy. This is an active measure to suppress the increase in turbulent velocity and eliminate the causes of vibration and noise.

<Example> Fig. 1 shows a piping system diagram of an air conditioning system using a heat storage tank. In Fig. 6, there is a heat storage tank l under the floor of the basement.
Water in the heat storage tank 1 is cooled by cooling equipment. The cooling equipment includes an evaporator 2, a condenser 3, a cooling tower 4, and a pump 5.6, and the necessary piping is provided for these. The cold water in the heat storage tank 1 is passed through a cold water outgoing pipe 8 by a pump 7 to an air conditioner installed on each floor of the building.
, transported to a jar. The water passed through the cooling coil 9a and the water bypassed by the four-way valve lO.

The cold water falls through the cold water return pipe 11 due to gravity and returns to the heat storage tank l.

In this embodiment, a pipe 12 that returns the water cooled by the heperator 2 into the heat storage tank 1 and a cold water return pipe 11 are connected to a mini-hydroelectric power generator.
i3 is provided so that the energy of free falling water is converted and recovered as electrical energy.

Figure 2 shows the installed state of the mini hydroelectric generator.

Mini water turbine 13a on '1112 and 11 where water falls freely
are provided respectively, and a mini power generation @13b is directly connected to the rotating shaft of each mini water turbine L3a.

Therefore, the mini-turbine 13a is rotationally driven by the water freely falling within the pipe 12 or 11, and the mini-generator 13b generates electricity by the rotational drive of the mini-turbine 13a. That is, the mini-generator 13b converts the interlocking energy into electrical energy, and the excess energy of the water that has passed through the evaporator 2 and the air conditioner 9 can be recovered. In medium and high-rise buildings, the pipes 11 are long, so the mini water turbines 13a are installed at required intervals with respect to the pipes 11 so as not to increase the vibration of the pipes or the sound of falling water. Therefore, the water falling into the heat storage tank 1 has its kinetic energy absorbed by the mini water turbine 13a and is significantly decelerated, thereby avoiding pipe vibration and the sound of falling water.

<Effects of the Invention> The method of recovering excess energy in an air conditioning system using a heat storage tank according to the present invention as described above can recover excess energy contained in water pumped to various parts of a building in an air conditioning system using a heat storage tank. This will be recovered as electrical energy, and will also serve as an active measure to suppress the increase in turbulence velocity when the water pumped to various parts of the building falls, eliminating the cause of vibration and noise, thus achieving the initial objective.

Table 1 below is a report showing the relationship between the effective head and flow rate, the turbine revolution speed, the turbine shaft output, and the amount of generated electricity when the mini hydroelectric generator is installed on a pipe with an inner diameter of 65 mm. .

Table 1 In this table, the amount of electricity generated per unit is the value that can be recovered as electrical energy from the excess energy contained in the water pumped to each part of the building. You'll know what happened. When installing a mini hydroelectric generator as in the present invention,
The installation cost is extremely small compared to the amount of power generated.

[Brief explanation of drawings]

FIG. 1 shows a piping system diagram of an air conditioner according to an embodiment of the method for recovering excess energy in an air conditioner using a heat storage tank of the present invention. FIG. 2 is an enlarged front view showing the installed state of the mini hydroelectric generator. 1... Heat storage tank, 2e... Evaporator, 3... Condenser, 4... Cooling tower, 5. 61111 pump, 7... Pump, 8... Cold water outgoing pipe, 9.9, φ. Air conditioner, 9a pot...cooling coil, 10--four-way valve. ll meeting...chilled water return pipe, 12...pipe, 13...mini hydroelectric generator, 13ae salary◆mini water wheel. 13b-...Mini generator, Patent applicant: Tokai Engineering Co., Ltd. Patent applicant: D-Nis Red E Co., Ltd. Patent applicant:
Hayashi Engineering Co., Ltd. Patent Attorney Hiroshi Onuma, Jko5”, JkQ-4+1, (Nie.

Claims (1)

[Claims] In an air conditioning system in which water freely falls inside the pipe and returns to the heat storage tank, a mini hydroelectric generator is provided in the pipe where water freely falls, and the energy of the free falling water is converted into electricity. A method for recovering excess energy in air conditioning equipment using a heat storage tank, which is characterized by converting and recovering energy.