JP2010091199A - Energy recovery method using hot spring water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy recovery method from hot spring water enabling effective use of resources. <P>SOLUTION: The energy recovery method using hot spring water includes: a step of supplying hot spring water and cold water to a heat exchanger for recovering energy; a step of detecting a first temperature of the cold water supplied to the heat exchanger; a step of detecting a second temperature of cold water discharged from the heat exchanger; a step of detecting a flow rate of the cold water discharged from the heat exchanger; and a step of calculating heat quantity moved from the hot spring water to the cold water based on the first and second temperatures and flow rate of the cold water. Preferably, the energy recovery method using hot spring water includes a step of further warming the cold water warmed by heat exchange to an intended temperature and using the cold water for a required application. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an energy recovery method using hot spring water.

  Japan is a country with a lot of volcanoes, which is said to be a volcanic country, and there are many hot springs all over the country, and hot spring water is coming out.

  However, although some of the hot spring water that is springing out is used for hot springs, it is often left in the springing state, and there has been a problem that effective utilization of resources has not been achieved.

  The present invention has been devised in view of such circumstances, and an object of the present invention is to provide a method for recovering energy from hot spring water that enables effective use of resources.

  An energy recovery method using hot spring water according to claim 1 of the present invention includes a step of supplying hot spring water and cold water to a heat exchanger performing energy recovery, and a step of detecting a first temperature of cold water supplied to the heat exchanger. Detecting a second temperature of the cold water discharged from the heat exchanger, detecting a flow rate of the cold water discharged from the heat exchanger, the first temperature, the second temperature, and the flow rate of the cold water. And a step of calculating the amount of heat transferred from the hot spring water to the cold water.

  The energy recovery method using hot spring water according to claim 2 of the present application is the method of claim 1, wherein the step of calculating the amount of heat is based on data relating to the first temperature, the second temperature, and the flow rate. The amount of heat transferred from the control unit to the management center by wired communication or wireless communication and transferred from the hot spring water to the cold water at the management center is calculated.

  The energy recovery method using hot spring water according to claim 3 of the present application is the method according to claim 1 or 2, wherein the cold water heated by heat exchange is further heated to a desired temperature to obtain a required use. It is characterized by including the step utilized in.

  According to the method of the present invention, it has become possible to easily utilize the energy of hot spring water that has not been effectively utilized in the past by a relatively simple method. Further, in the method of the present invention, since the calculation of the heat quantity is performed at a time in the management center, it is not necessary to go to the hot spring water source, and the labor can be reduced. Furthermore, by using the thermal energy acquired by heat exchange, for example, hot water having a desired temperature can be obtained with less thermal energy than warm water, and cost reduction can be realized. Alternatively, by effectively selling the thermal energy acquired by heat exchange, for example, it is possible to effectively use resources that have been left unattended.

  Next, an energy recovery method using hot spring water according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a flowchart showing a procedure of an energy recovery method according to a preferred embodiment of the present invention, and FIG. 2 is a block diagram schematically showing a measuring system in the energy recovery method of FIG.

  First, cold water and hot spring water are supplied to the heat exchanger 10 that performs energy recovery. In FIG. 2, reference numerals 12 and 14 denote a cold water inlet and a hot spring water inlet, respectively. In addition, the temperature of the cold water supplied to the heat exchanger 10 is detected by the sensor 16.

  In the heat exchanger 10, thermal energy is supplied from the hot spring water to the cold water (that is, the cold water is heated, and the temperature of the hot spring water is lowered by the amount of the heated thermal energy). Cold water and hot spring water subjected to heat exchange are discharged from the heat exchanger 10 through the cold water outlet 18 and the hot spring water outlet 20, respectively. The temperature of the cold water discharged from the heat exchanger 10 is detected by the sensor 22.

  Next, the flow rate of the cold water discharged from the heat exchanger 10 is detected by the flow meter 24.

On the other hand, the cold water temperature data T ₁ before the heat exchange detected by the sensor 16 and the cold water temperature data T ₂ after the heat exchange detected by the sensor 22 are sent to the control unit 26. Further, the flow rate data F of the cold water detected by the flow meter 24 is sent to the control unit 26.

  As the control unit 26, a general type personal computer or a microcomputer may be used. Or you may use the thing like the portable communication terminal with which the control unit 26 and the communication unit 28 were integrated.

The data sent to the control unit 26 is wirelessly transmitted to the communication unit 30 (30a is a wireless antenna) of the management center via the communication unit 28 (28a is a wireless antenna), and is sent to the calculation unit 32 of the management center. From the data T ₁ , T ₂ , and F, the heat quantity Q of heat energy transferred from hot spring water to cold water
Q = (T ₂ −T ₁ ) × F
Calculate based on

  The calculation unit 32 may be a general type personal computer. The communication unit 30 and the calculation unit 32 may be integrated.

  Next, the cold water heated by heat exchange is further heated to a desired temperature and used for a required application.

  Next, the implementation of the energy recovery method of the present invention will be described based on a specific example with reference to FIG. Assume that the temperature of the hot spring water to be used is 80 ° C and 60 ° C, and the temperature of the cold water is 10 ° C. 80 ° C hot spring water a is 150 liters / minute, 60 ° C hot spring water b is 250 liters / minute (thus equivalent to supplying 67.5 ° C hot spring water 400 liters / minute), Supply cold water of 10 ° C to a titanium plate heat exchanger. It is assumed that the hot spring water has reached 50 ° C due to this heat exchange. The hot spring water that has reached 50 ° C. is stored in a hot spring water tank and is appropriately supplied to the bathtub.

The amount of heat transferred to cold water by heat exchange is
(67.5-50) × 400 liters × 60 minutes = 420,000 kcal / hour. In other words, an amount of heat of 420,000 kcal / hour is recovered from the hot spring water a / hot spring water b. Since A heavy oil calorific value is 8,000 kcal / hour, when the recovered calorie is converted into heavy oil consumption,
420,000 kcal / hour ÷ 8,000 kcal / hour (A heavy oil calorie)
= 52.5 liters, and assuming that heat exchange work is averaged for 10 hours a day,
The amount of heat corresponding to 52.5 liters / hour × 10 = 525 liters / day of heavy oil will be recovered.

  On the other hand, the hot water heated in this way is stored in a hot water supply tank, further heated to a desired temperature by a boiler, and provided for a required use as hot water. By using hot water heated using hot spring water, less heat energy is required than when cold water is heated, and cost reduction can be realized.

  In addition to the use as hot water for hot water supply, the heated water or water that has been converted into other energy may be used for other purposes, or sold in a model such as a scale sale. .

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, in the above embodiment, data is wirelessly transmitted from the hot spring water source to the management center. However, the data may be transmitted by wire using a telephone line or the like.

It is the flowchart which showed the procedure of the energy recovery method which concerns on preferable embodiment of this invention. It is the block diagram which showed typically the measurement system in the energy recovery method of FIG. It is the block diagram which showed the specific example of the energy recovery method of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Heat exchanger 12 Cold water inlet 14 Hot spring water inlet 16 Temperature sensor 18 Cold water outlet 20 Hot spring water outlet 22 Temperature sensor 24 Flowmeter 26 Control unit 28, 30 Wireless communication unit 32 Calculation unit

Claims (3)

An energy recovery method using hot spring water,
Supplying hot spring water and cold water to a heat exchanger for energy recovery;
Detecting a first temperature of cold water supplied to the heat exchanger;
Detecting a second temperature of cold water discharged from the heat exchanger;
Detecting the flow rate of cold water discharged from the heat exchanger;
Calculating the amount of heat transferred from the hot spring water to the cold water based on the first temperature, the second temperature and the flow rate of the cold water;
A method comprising the steps of: In the step of calculating the amount of heat, data relating to the first temperature, the second temperature, and the flow rate are sent to a control unit, and sent from the control unit to a management center by wired communication or wireless communication. 2. A method according to claim 1, wherein the amount of heat transferred from water to cold water is calculated. The method according to claim 1, further comprising the step of further heating the cold water heated by heat exchange to a desired temperature and using the cold water for a required application.

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