JPS5920566Y2 - Factory heating equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a factory heating system having heat source piping for steam and high-temperature condensate.

Traditionally, heating systems for factories that utilize solar heat have been provided in order to save energy, but the supply of heat from solar heat is extremely unstable, so the hot water supplied to the water heater has to be constantly kept at a high temperature. There is a problem that heating cannot be carried out due to low temperature, and when heating only with solar heat, the absolute amount of heating heat inside the factory is insufficient on rainy or cloudy days or at night. There was a problem that a heat storage tank with a large capacity was required, and the overall size was large and expensive, making it impractical.

In addition, in factories, there is generally a heat source such as steam,
It is possible to use this exhaust heat source as an auxiliary heat source, but the supply of heat from this exhaust heat source is extremely unstable.
Therefore, there was a problem in that the absolute amount of heating heat was insufficient, making it impossible to perform heating.

Therefore, in order to solve the above problem, a system has been proposed in which a heating system using solar heat is combined with a refrigeration system such as a water-cooled water chilling unit, but the heat source of the refrigeration system is connected to a solar collector. Since hot water in the water tank is used as a heat source, the evaporator of the refrigeration equipment absorbs heat, and the condenser supplies it to the water heater for heating. Therefore, if the supply of solar heat decreases (including zero), There was a problem that insufficient capacity could be obtained, making it impossible to heat the inside of the factory.

Therefore, the present invention was devised to solve the above problems, and by using solar heat and heat sources such as factory steam as heating heat, and combining it with a refrigeration system,
Solar heat, whose heat supply is unstable, can be utilized to the fullest at all times regardless of the supply amount, making it possible to reliably lower heating costs, and eliminating the need for large-capacity solar heat storage tanks. To provide a heating device for a factory that is compact and inexpensive as a whole and can perform heating reliably without insufficient capacity at all times.

That is, the present invention is a factory heating device having heat source piping such as steam, which includes a solar collector having a water inlet pipe and a water outlet pipe, a water tank for storing hot water heated by the collector, and a refrigeration device. and a water heater, the water tank and the inlet side of the water heater are connected by a hot water outgoing pipe having a water condenser and a pump of the refrigeration system, and a hot water outgoing pipe having a pump and a first on-off valve, The water tank and the outlet side of the water heater are connected by a hot water return pipe, and the water inlet pipe and the water evaporator of the refrigeration system are connected between the pump and the first on-off valve in the hot water outgoing pipe. A first connecting pipe connected to the inlet side is connected, and the water outlet pipe and a second connecting pipe connected to the outlet side of the water evaporator are connected to the water tank, while the heat source is connected to the water tank. A heat source pipe extending from the pipe and having a second on-off valve is connected, and when the water temperature of the water tank is in a high temperature range, the first
The on-off valve is opened and the second on-off valve is closed to perform heating operation using only solar heat, and when the temperature is in the medium temperature range, the first on-off valve and the second on-off valve are closed and heating operation is performed using the refrigeration device using solar heat as an auxiliary heat source. Further, when the temperature is in a low temperature region, the first on-off valve is closed, the second on-off valve is opened, and the refrigeration system is operated to perform a heating operation using the heat source from the heat source piping as an auxiliary heat source. It is something to do.

Hereinafter, embodiments of the device of the present invention will be described based on the drawings.

In the drawing, 1 is a heat source pipe such as steam piped to the factory, and what is shown in the drawing consists of a steam pipe 1a and a drain pipe 1b, and a boiler 2 and a steam load (not shown) are connected to the steam pipe 1a. , the high temperature drain is to be discharged through the drain pipe 1b.

Therefore, the factory heating device having the heat source piping 1 is as follows:
It includes a solar collector 5 having a water inlet pipe 3 and a water outlet pipe 4, a water tank 6 for storing hot water heated by the collector 5, a freezing device 7, and a water heater 8.

The water tank 6 and the inlet side of the water heater 8 are connected by a hot water outgoing pipe 15 having a water condenser 10 of the refrigeration device 7 and a pump P1, and a hot water outgoing pipe 11 having the pump P1 and a first on-off valve V1. The water tank 6 and the outlet side of the water heater 8 are connected by a hot water return pipe 18.

To explain this point in more detail, the water tank 6 consists of a first water tank 6a and a second water tank 6b. An outgoing pipe 15 and a hot water return pipe 18 are connected to each other.

In addition, the pump P1 and the first pump in the hot water outgoing pipe 11
The water inlet pipe 3 and a first connecting pipe 13 connected to the inlet side of the water evaporator 12 in the refrigeration device 7 are connected between the on-off valve V1 and the first connecting pipe 13 has a water volume. A control valve ■6 is provided.

Further, a second connecting pipe 14 is connected to the first water tank 6a of the water tank 6 to the water outlet pipe 4 and the outlet side of the water evaporator 12.
while connecting the second water tank 6b and the water condenser 10.
A pump P2 is installed in the hot water outgoing pipe 15 connecting the two.

Further, a heat source pipe 16 having a second on-off valve 2 is connected from the heat source pipe 1 to the first water tank 6a.

The solar collector 5 has a large number of collector elements each having a water passage arranged in parallel, and the population of each water passage is connected to the water inlet pipe 3.
The outlets are respectively connected to the water outlet pipes 4, and the water supplied to each water passage is made to absorb solar heat and become hot water, which is taken out from the water outlet pipe 4, so that it can be used as a collector element, for example, to control the amount of water supplied to the water passages. is 21/min, and using 100 sheets with a solar heat absorption capacity of 400 Kcal/h, the total amount of water supplied at 2001/min is 40,000.
It uses kcal/h of solar heat to absorb heat.

The refrigeration device 7 uses a so-called water-cooled chiller that includes the water condenser 10, water evaporator 12, compressor 17, etc., and the motors of the compressor 17 and pump P2 are interlocked. Let it happen.

The amount of water supplied to the water condenser 10 and water evaporator 12 is 18017 m1n1.3Q 1 /1l-1
in, and the capacity of the compressor 17 is 15H).

Further, the water heater 8 is used as a heat dissipation mat for heating the feet of workers working in a factory, for example, and is formed so that hot water pipes are buried in the mat.
It is laid on the floor of the factory.

Note that this water heater 8 may be used not only as a heat radiation mat but also for hot water supply.

Further, the first water tank 6a is equipped with a pipe 16a connected to the heat source pipe 16 and a heat exchanger 19, and when the water temperature in the water tank 6a is low, steam is directly blown out from the pipe 16a, and When the temperature is high, the steam is made to flow to the heat exchanger 19.

In addition, the first on-off valve v1 performs both opening and closing operations, and the second on-off valve V2 changes the valve opening between a fully closed state and a fully open state in proportion to the input amount of a signal to be described later. Use one that changes between the two.

In addition, the water volume control valve v4 is of a variable opening degree such that when the suction pressure of the compressor 17 is high, the valve opening degree is small, and when the suction pressure of the compressor 17 is low, the valve opening degree is large. It is used to adjust the

In addition, since the third on-off valve ■3 is provided in the job opening pipe 3,
It performs opening and closing operations.

Therefore, when the water temperature of the first water tank 6 is in the high temperature range,
The first on-off valve V1 is opened and the second on-off valve V2 is closed to perform heating operation using only solar heat, and when the temperature is in the medium temperature range, the first on-off valve V1 and the second on-off valve V2 are closed, and the heat source piping 1 is closed. A heating operation is performed by the refrigeration device 7 using solar heat as an auxiliary heat source without using a heat source, and when the temperature is in a low temperature region, the first on-off valve (1) is closed and the second on-off valve (v2) is opened;
This is as if the refrigeration system 7 were to perform a heating operation using the heat source in the heat source pipe 1 as an auxiliary heat source.

The above-mentioned control is carried out by first to third detectors th 1 , th 2 , th 3 provided in the first water tank 6 a of the water tank 6 for detecting the water temperature X in the water tank 6 a and attached to the solar collector 5 . This is done by a fourth detector th4 that detects the hot water temperature Y.

That is, the hot water temperature X in the first water tank 6 detected by the first detector thl and the fourth detector th4 is compared with the hot water temperature Y flowing out from the solar collector 5, and when X≦Y, the temperature 3.Open the on-off valve V3 to connect the first water tank 6a and the solar collector 5, and when X>Y, close the third on-off valve V3 to connect the first water tank 6a and the solar collector 5. They threaten to cut off contact.

Further, the second detector th2 detects whether the hot water temperature X in the first water tank 6a is in the high temperature region or the medium temperature region, and if it is in the high temperature region, it is caused by only the solar heat. A high temperature signal for heating operation is output, and when the temperature is in the medium temperature range, solar heat is used as an auxiliary heat source without using the heat source of the heat source pipe 1 at the medium temperature in relation to the output signal of the third detector th3 described later. This outputs a medium temperature signal for heating operation.

Since there is a differential, the boundary temperature of the surface area where the second detector th2 causes the output to be switched between the high temperature signal and the medium temperature signal is different when the hot water temperature X rises and when it falls. For example, the temperature is set to 60°C when ascending and 50°C when descending.

Then, by outputting the high temperature signal, the drive of the compressor 17 and the pump P1 is stopped, the pump P1 is driven, the first on-off valve (1) is opened, and the second on-off valve (v2) is fully closed. As a result, the heat source tube 16 is shut off.

In this case, the first
From the water tank 6a, a pump P1, a hot water outgoing pipe 11. A hot water cycle is formed in which the water reaches the water heater 8 via the first on-off valve V1, returns from the water heater 8 to the first water tank 6a via the second water tank 6b, and is heated by solar heat.

Next, when the water temperature decreases, the output of the medium temperature signal will cause
The first on-off valve (1) is closed and the second on-off valve (2) is fully closed to shut off the heat source tube 16, while pumps P1, P2, and the compressor 17 are driven.

In this case, the hot water in the water tank 6a is transferred from the first water tank 6a with the solar collector 5 in communication to the pump P1, the hot water outgoing pipe 11, the first connecting pipe 13, and the water evaporator 1 of the refrigeration device 7.
2. The solar heat is used as an auxiliary heat source by circulating it back to the first water tank 6a via the second connecting pipe 14, and hot water is transferred from the second water tank 6b to the refrigeration system 7 via the hot water outgoing pipe 15 by the pump P1. The hot water is supplied to the water condenser 10, and the hot water is passed through the water heater 8, and from the water heater 8 to the second water tank 6.
This forms a hot water cycle for heating operation that returns to step b.

Next, the third detector th3 detects whether the hot water temperature in the first water tank 6a is in the medium temperature range or the low temperature range, and if it is in the medium temperature range, the second detector th3 th
In relation to the output signal No. 2, a medium temperature signal of the refrigeration operation at medium temperature is output, and when the hot water temperature X is in the low temperature region, heating operation using the heat source of the heat source pipe 1 at low temperature is output. This causes a low temperature signal to be output.

In addition, the boundary temperature between the medium temperature and low temperature surface regions measured by the third detector th3 is set to, for example, 25°C, and the heat source of the heat source pipe 1 is first provided using the high temperature drain in the drain pipe 1b, and only the high temperature drain is used as the heat source of the heat source pipe 1. When there is insufficient steam in the steam pipe 1a, the steam in the steam pipe 1a is used.

Furthermore, when the low temperature signal is output, in a range where the hot water temperature
Temperature X varying between 25°C and 20°C in the range
The second on-off valve V2 outputs a signal corresponding to 20
' In the range lower than C, the second on-off valve (2) is kept fully open.

In this manner, the output of the low temperature signal causes the heat source tube 16 to
The refrigeration device 7 is operated in a state where the water is communicated with the first water tank 6a, and a hot water cycle for heating operation is formed in which the water is circulated from the condenser 12 to the water heater 8.

In addition, 18a is an overflow pipe connecting the second water tank 9 to the first water tank 6, 20 is a return pipe returning from the heat exchanger 19 to the drain pipe 1b, 21 is a water supply pipe, 22 is a hot water supply equipment, 2
3 is an overflow pipe of the first water tank 6a, 24 is a discharge pipe, 5 is a hot water supply valve, VA is an on-off valve, and VB is a check valve.

However, in the above configuration, when the amount of solar heat is large, such as during heating operation or during clear weather during the day, the hot water supplied from the solar collector 5 to the first water tank 6a causes the temperature of the hot water in the first water tank 6a to rise to a high temperature range. When the temperature is maintained at the temperature within , the first on-off valve V1 opens and the pump P1 is driven, so that the hot water in the first water tank 6a returns from the hot water outgoing pipe 1] through the water heater 8 and from the second water tank 6b to the first water tank 6a. Heating is operated using only solar heat,
The heat radiated from the water heater 8 heats the inside of the factory.

In addition, the amount of solar heat supplied to the first water tank 6a decreases,
When the hot water temperature in the first water tank 6a reaches a temperature within the medium temperature range, the second on-off valve V2 is also closed, the heat source pipe 16 remains cut off, and the first on-off valve V1 is closed, and the pump P2 and refrigeration operation 7 are activated.

Then, the water flow control valve v4 opens in response to the level of the low pressure.

In this way, the hot water in the first water tank 6a heated by solar heat supplied from the solar collector 5 is transferred to the water evaporator 12.
The warm water is circulated from the second water tank 6b to the water condenser 10 by the pump P2, and returns to the water tank 6a through the water tank 6a.
A hot water cycle is formed by the refrigeration device 7, which communicates with the water heater 8 and the second water tank 6b, using solar heat as an auxiliary heat source, and the amount of heat absorbed from the water evaporator 12 is transferred to the water condenser 1.
The heat is radiated through the water heater 8 through the water heater 8, and the inside of the factory is reliably heated.

Furthermore, when the amount of solar heat supplied to the first water tank 6 decreases (including the amount of snow at night or on cloudy days) and the temperature of the hot water in the first water tank 6a falls within the low temperature range, the second on-off valve 2 is opened, high-temperature drain water or steam is supplied from the heat source pipe 16 into the first water tank 6a to replenish the insufficient amount of heat, and the replenished heat amount of the hot water in the first water tank 6a is transferred to the water evaporator. The warm water circulated through the water condenser 10 and heat-absorbed by the water condenser 10 is radiated in the water heater 8, and the heating operation by the refrigeration device 7 using the heat source from the heat source piping 1 as an auxiliary heat source ensures heating in the factory. is carried out.

As described above, the present invention, when the amount of solar heat supplied to the solar collector 5 fluctuates and the amount of heating heat is insufficient, the amount of heat source such as steam used in the factory is controlled according to the insufficient amount of heat, By operating the refrigeration equipment, we were able to heat the inside of the factory, so we were able to use the solar heat, which is unstable in supply, to the fullest at all times regardless of the supply amount, and we were also able to utilize the steam exhaust heat from the factory. Combined with the ability to shorten the operating time of the refrigeration device 7, heating costs can be significantly reduced.

Furthermore, there is no need to increase the capacity of the first water tank 6a that stores solar heat, and the refrigeration device 7 can also be made small in capacity, making the whole compact and inexpensive. It can provide heating.

In the above explanation, the second water tank 6b is used, but the hot water outgoing pipe 15 on the inlet side and the hot water return pipe 18 on the outlet side of the water heater 8 are connected to the first water tank 6a without using the second water tank 6b. It may be made to communicate directly with.

As described above, the present invention is a factory heating device having a heat source pipe 1 such as steam, and a solar collector 5 having a water inlet pipe 3 and a water outlet pipe 4, and storing hot water heated by the collector 5. The inlet side of the water tank 6 and the water heater 8 is connected to a hot water outgoing pipe 15 having a water pump 10 of the freezing device 7 and a pump P1. Hot water outgoing pipe 1 having pump P1 and first on-off valve ■1
1, the water tank 6 and the outlet side of the water heater 8 are connected by a hot water return pipe 18, and the water inlet is connected between the pump P1 and the first on-off valve 1 in the hot water outgoing pipe 11. The pipe 3 and the first connecting pipe 13 connected to the inlet side of the water evaporator 12 in the refrigeration device 7 are connected, and the water tank 6
The water outlet pipe 4 and the second connecting pipe 14 connected to the outlet side of the water evaporator 12 are connected to the water tank 6.
When a heat source pipe 16 extending from the heat source pipe 1 and having a second on-off valve 2 is connected and the temperature in the water tank 6 can be maintained in the high temperature range only by solar heat, heating is performed by a heating operation using only solar heat. When the temperature in the water tank 6 falls to the medium temperature range due to insufficient solar heat, heating is performed by operating the refrigeration device 7 that uses solar heat as an auxiliary heat source without using high-temperature drain or steam in the factory, and furthermore, when the solar heat is insufficient. When the temperature inside the water tank 6 drops, the insufficient amount of heat is supplemented by high-temperature drain or steam in the factory, and the refrigeration system 7 is operated using this heat source as an auxiliary heat source to perform heating. No matter how much the energy fluctuates, the solar heat, which does not require heating costs, can always be utilized to the maximum extent, and this, combined with the ability to shorten the operation time of the refrigeration system 7, significantly reduces heating costs.

In addition, there is no need to increase the capacity of the water tank 6 that stores solar heat, and the refrigeration device 7 can also be made small in capacity, making the whole compact and inexpensive. This allows for reliable heating without any shortage of heat.

[Brief explanation of the drawing]

The drawing is a hot water piping system diagram showing an embodiment of the present invention. 1... Heat source piping, 3... Water inlet pipe, 4... Water outlet pipe, 5... Solar collector, 6... Water tank, 7...
Refrigeration equipment, 8...Water heater, 10...Water 4 carefully,
11...Hot water outgoing pipe, 12...Water evaporator, P,,P
,,...pump, vl...first on-off valve, ■2...
Second on-off valve.

Claims (1)

[Scope of utility model registration request] A heating system for a factory having a heat source pipe 1 such as steam, which includes a solar collector 5 having a water inlet pipe 3 and a water outlet pipe 4, a water tank 6 for storing hot water heated by the collector 5, and a refrigeration system. 7 and a water heater 8, the water tank 6 and the water heater 8
The inlet side of the water condenser 10 of the refrigeration system 7 and the pump P
The water tank 6 and the outlet side of the water heater 8 are connected by a hot water return pipe 18, and the water tank 6 and the outlet side of the water heater 8 are connected by a hot water return pipe 18. The water inlet pipe 3 and the refrigeration device 7 are connected between the pump P1 and the first on-off valve V1 in the hot water outgoing pipe 11.
a first connecting pipe 13 connected to the inlet side of the water evaporator 12 in, and a second connecting pipe 14 connected to the water tank 6 to the water outlet pipe 4 and to the outlet side of the water evaporator 12; On the other hand, a heat source pipe 16 extending from the heat source pipe 1 and having a second on-off valve V2 is connected to the water tank 6, and when the water temperature in the water tank 6 is in a high temperature range, the first on-off valve V2 is connected to the water tank 6. 1 is opened and the second on-off valve V2 is closed to perform heating operation using only solar heat. When the temperature is in the medium temperature range, the first on-off valve v1 and the second on-off valve V2 are closed to perform the refrigeration operation using solar heat as an auxiliary heat source. The heating operation by the device 7 is also performed when the temperature is low.
A heating system for a factory, characterized in that the first on-off valve v1 is closed and the second on-off valve V2 is opened to cause the refrigeration system to perform a heating operation using the heat source from the heat source pipe 1 as an auxiliary heat source.