CN115509269A - Water tank energy storage control method for preparing hot bath water from bath wastewater - Google Patents
Water tank energy storage control method for preparing hot bath water from bath wastewater Download PDFInfo
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- CN115509269A CN115509269A CN202211353819.7A CN202211353819A CN115509269A CN 115509269 A CN115509269 A CN 115509269A CN 202211353819 A CN202211353819 A CN 202211353819A CN 115509269 A CN115509269 A CN 115509269A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 443
- 239000002351 wastewater Substances 0.000 title claims abstract description 187
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004146 energy storage Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 75
- 238000003287 bathing Methods 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 239000008399 tap water Substances 0.000 claims abstract description 28
- 235000020679 tap water Nutrition 0.000 claims abstract description 28
- 230000005611 electricity Effects 0.000 claims abstract description 27
- 239000008236 heating water Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 abstract description 2
- 230000002354 daily effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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Abstract
The invention discloses a water tank energy storage control method for preparing hot bath water from bath wastewater, which comprises the following steps: the waste water tank liquid level sensor, the hot water tank liquid level sensor and the PLC are internally provided with clocks to respectively transmit the corresponding waste water tank liquid level h1, the hot water tank liquid level h2 and the current time T1 to the PLC; and the PLC controls the starting or closing of the valve A, the valve B, the pump A, the bathing wastewater water heating unit, the pump B, the valve C, the pump C, the auxiliary heating device and the alarm according to the obtained wastewater tank liquid level h1, the hot water tank liquid level h2 and the current time T1. According to the process, the tap water is heated after the heat exchange of the bathing hot water generated in the use place to prepare the bathing hot water, the bathing waste water for bathing by people is just used, most of the bathing waste water is at night, and the waiting time from the storage in the waste water tank to the heating in the valley electricity stage is not long, so that the temperature drop can be effectively reduced, the heating efficiency is improved, and the heating cost is reduced.
Description
Technical Field
The invention relates to the technical field of hot water preparation by bath wastewater production, in particular to a water tank energy storage control method for preparing bath hot water by bath wastewater.
Background
The bath waste water has the characteristic of wide range and large amount, is used as a low-grade heat source, contains a large amount of heat energy, and simultaneously has small heat loss during storage due to low temperature, and if polyurethane foaming heat preservation is adopted, the temperature drop of the waste water in a water tank within 24 hours can be controlled within 1 ℃. The applicant previously filed a patent named waste heat utilization method with one-to-one ratio of clear water flow and waste water flow of a heat pump, and discloses a technical scheme for preparing hot water by utilizing bath waste water.
In addition, the power generation of the power plant is relatively constant, and is the peak of the power load of the life of the factory and residents before 22 o' clock in the daytime and at night, and the power price is higher at the moment; and the power consumption load is the low valley in late night to early morning, and the power consumption price is lower at the moment. Therefore, in order to suppress the load fluctuations of the power grid, and also in order to further reduce the use costs by reducing the electricity consumption costs, a demand for energy storage at night arises. Therefore, the applicant provides a control scheme for preparing hot water energy storage by using the bath wastewater by analyzing the characteristics of the bath wastewater to heat the water system.
Disclosure of Invention
The invention aims to: the defects of the prior art are overcome, the water tank energy storage control method for preparing the bathing hot water by the bathing wastewater is provided, the tap water is heated and prepared to obtain the bathing hot water after the heat exchange of the bathing hot water generated in a use place is utilized, most of the bathing wastewater for bathing by people is just evening, the bathing wastewater is stored in the wastewater tank, and the waiting time for heating in a valley electricity stage is not long through the application, so that the temperature drop can be effectively reduced, the heating efficiency is improved, and the heating cost is reduced.
The technical scheme adopted by the invention is as follows:
the energy storage control method for the water tank for preparing hot bath water from bath wastewater comprises the following steps:
1) The waste water tank liquid level sensor, the hot water tank liquid level sensor and the PLC are internally provided with clocks to respectively transmit the corresponding waste water tank liquid level h1, the hot water tank liquid level h2 and the current time T1 to the PLC;
2) If the current time T1 is not in the water supply time period set by the PLC, the pump B on the water outlet pipe of the hot water tank is closed; if the current time T1 is within the water supply time period set by the PLC, and the PLC judges that the liquid level h2 of the hot water tank is less than the starting protection water level h2c of the water supply pump of the hot water tank, the PLC controls an alarm to give an alarm and the pump B is turned off; if the current time T1 is within the water supply time period set by the PLC, and the PLC judges that the liquid level h2 of the hot water tank is greater than the sum of the starting protection water level h2c of the water supply pump of the hot water tank and the return difference of the hot water tank, the PLC controls the pump B to start hot water supply;
3) If the current time T1 is in the valley power time period, and the PLC judges that the liquid level h2 of the hot water tank is less than the valley power hot water heating starting water level h2a of the hot water tank, and the PLC judges that the liquid level h1 of the waste water tank is greater than the sum of the hot water heating starting water level h1a of the waste water tank and the return difference of the waste water tank; or if the current time T1 is not in the valley power time period, and the PLC judges that the liquid level h2 of the hot water tank is less than the emergency heating water starting water level h2b of the hot water tank and the PLC judges that the liquid level h1 of the waste water tank is greater than the sum of the heating water starting water level h1a of the waste water tank and the return difference of the waste water tank;
the PLC controls a valve A on a waste water drain pipe, a valve B on a hot water tank water inlet pipe of a hot water tank, a pump A on a waste water tank water outlet pipe of the waste water tank and a bathing waste water heating unit to be started;
4) If the current time T1 is within the valley power time period, and the PLC judges that the liquid level h2 of the hot water tank is greater than the sum of the valley power hot water heating starting water level h2a of the hot water tank and the return difference of the hot water tank; or if the current time T1 is not in the valley power time period, and the PLC judges that the liquid level h2 of the hot water tank is greater than the sum of the emergency hot water heating starting water level h2b of the hot water tank and the return difference of the hot water tank;
the PLC controls the bath wastewater hot water making unit, the valve A, the valve B, the pump A, the auxiliary heating device communicated with the hot water tank, the valve C arranged on a hot water tank water replenishing pipe communicated with a tap water pipe network and the hot water tank, and the pump C arranged on an auxiliary heating water inlet pipe communicated with the hot water tank and the auxiliary heating device to be closed;
5) If the current time T1 is within the valley power time period, and the PLC judges that the liquid level h2 of the hot water tank is smaller than the valley power hot water heating starting water level h2a of the hot water tank, and the PLC judges that the liquid level h1 of the waste water tank is smaller than the hot water heating starting water level h1a of the waste water tank;
the PLC controls the bathing wastewater water heating unit, the valve A, the valve B and the pump A to be closed, and the PLC controls the valve C, the pump C and the auxiliary heating device to be opened;
6) If the current time T is within the valley electricity time period, and the PLC judges that the liquid level h2 of the hot water tank is less than the valley electricity water heating starting water level h2a of the hot water tank, the PLC judges that the liquid level h1 of the waste water tank is greater than the water heating starting water level h1a of the waste water tank and less than the sum of the water heating starting water level h1a of the waste water tank and the return difference of the waste water tank, and the PLC receives bath waste water and turns off the water heating unit;
the PLC controls the bathing wastewater water heating unit, the valve A, the valve B and the pump A to be closed, and the PLC controls the valve C, the pump C and the auxiliary heating device to be opened.
The invention further improves the scheme that the height difference between the heating water starting water level h1a of the waste water tank and the inner bottom surface of the waste water tank and the height difference between the water supply pump starting protection water level h2c of the hot water tank and the inner bottom surface of the hot water tank are both within the range of 0.2 to 0.5 meter.
According to a further improved scheme of the invention, the height difference between the valley point electricity hot water starting water level h2a of the hot water tank and the inner bottom surface of the hot water tank accounts for 80-90% of the height of the inner cavity of the hot water tank.
In a further improvement of the invention, the emergency hot water starting water level h2b of the hot water tank is higher than the water supply pump starting protection water level h2c of the hot water tank.
According to a further improvement scheme of the invention, the height difference between the emergency heating water starting water level h2b of the hot water tank and the inner bottom surface of the hot water tank accounts for 30-40% of the height of the inner cavity of the hot water tank.
According to a further improvement scheme of the invention, the return difference of the wastewater tank and the return difference of the hot water tank are both in the range of 3 to 8 centimeters.
In a further development of the invention, the water supply time interval is set by a PLC controller.
According to a further improvement scheme, the volume of the waste water tank and the volume of the hot water tank are both larger than or equal to the daily water consumption of a use place.
According to a further improved scheme of the invention, the bathing wastewater hot water making unit comprises a heat exchanger and at least one water source heat pump, wherein a wastewater tank is communicated with one end of a wastewater heat exchange pipe in the heat exchanger through a wastewater tank water outlet pipe, the other end of the wastewater heat exchange pipe is communicated with an evaporator of the water source heat pump through a wastewater heat exchange water outlet pipe and then communicated with a municipal drainage pipe network through a wastewater drainage pipe, a tap water pipe network is communicated with one end of a tap water heat exchange pipe in the heat exchanger through a tap water inlet pipe A, and the other end of the tap water heat exchange pipe is communicated with a condenser of the water source heat pump through a tap water heat exchange water outlet pipe and then communicated with a hot water tank through a hot water tank water inlet pipe.
According to a further improved scheme of the invention, the waste water tank is respectively communicated with each bathing waste water collecting end of a use place through a bathing waste water pipe, and the hot water tank is respectively communicated with each bathing water outlet end of the use place through a hot water tank water outlet pipe.
The invention has the beneficial effects that:
firstly, the water tank energy storage control method for preparing the bathing hot water from the bathing wastewater disclosed by the invention is characterized in that the bathing hot water generated in a use place is utilized for heat exchange, then the tap water is heated to prepare the bathing hot water, and the bathing hot water is just stored in the wastewater tank for a short time until the bathing wastewater for people to bathe is mostly in the evening and is heated in a valley power stage, so that the temperature drop can be effectively reduced, the heating efficiency is improved, and the heating cost is reduced.
Secondly, according to the water tank energy storage control method for preparing the hot bath water from the bath wastewater, the temperature in the hot water tank can be ensured even under the condition of a small amount of bath wastewater by arranging the auxiliary heating device and enabling the working time of the auxiliary heating device to be in the valley power period.
Thirdly, the water tank energy storage control method for preparing the bathing hot water from the bathing wastewater has the advantages that the equipment does not need to be started to prepare water in the off-peak electricity period, the water supply requirement can be met at any time period by configuring the large hot water tank meeting the hot water quantity all day long, the large wastewater tank meeting the wastewater discharge quantity all day long is configured, and the wastewater collection requirement can be met at any time period.
Fourth, the water tank energy storage control method for preparing hot bath water from bath wastewater disclosed by the invention works during the valley power period no matter whether the heat pump main machine or the auxiliary heat equipment is used, so that the fluctuation of a power grid is suppressed, and the energy cost for preparing hot water is reduced.
Fifth, according to the water tank energy storage control method for preparing hot bath water from bath wastewater, if the hot water consumption is too large in the daytime and the emergency situation of insufficient hot water occurs in the off-peak electricity period, the heat pump main machine or the auxiliary heating device can be started in time, and hot water supply is preferentially guaranteed.
Sixth, the water tank energy storage control method for preparing hot bath water from bath wastewater of the invention preferentially uses the bath wastewater to prepare the hot water no matter water is prepared in the valley power period or in the emergency condition in the non-valley power period, and only when the heat energy of the wastewater is insufficient, the auxiliary heating equipment is started, so that the energy conservation of the system is ensured.
Drawings
FIG. 1 is a schematic diagram of the piping of the present invention.
FIG. 2 is an electrical schematic diagram of the control system of the present invention.
FIG. 3 is a logic diagram of the control method of the present invention.
Detailed Description
As can be seen from fig. 1-2, the water tank energy storage system for preparing bathing hot water from bathing wastewater comprises a wastewater tank 1 which is communicated with each bathing wastewater collection end of a use place through a bathing wastewater pipe 6, wherein the bathing wastewater pipe 6 is communicated with the top of the wastewater tank 1, and further comprises a bathing wastewater water heating unit 39, the bathing wastewater water heating unit 39 comprises a heat exchanger 2, a water source heat pump A3 and a water source heat pump B4, the bottom of the side wall of the wastewater tank 1 is communicated with one end of a wastewater heat exchange pipe in the heat exchanger 2 through a wastewater tank water outlet pipe 10 provided with a valve E26 and a pump a32, the other end of the wastewater heat exchange pipe is communicated with one end of an evaporator a18 of the water source heat pump A3 through a wastewater heat exchange water outlet pipe 11, the other end of the evaporator a18 is communicated with one end of an evaporator B20 of the water source heat pump B4 through a wastewater communication pipe 13, and the other end of the evaporator B20 is communicated with a municipal drainage pipe network through a wastewater drainage pipe 8 provided with a valve a 29; the tap water pipe network 7 provided with a valve D25 is communicated with one end of a tap water pipe in the heat exchanger 2 through a tap water heat exchange water inlet pipe 12, the other end of the tap water pipe is communicated with one end of a condenser B21 of the water source heat pump B4 through a tap water heat exchange water outlet pipe 14, the other end of the condenser B21 is communicated with one end of a condenser A19 of the water source heat pump A3 through a tap water communicating pipe 15, and the other end of the condenser A19 is communicated with the top of the hot water tank 5 through a hot water tank water inlet pipe 16 provided with a valve B30; the tap water pipe network 7 is also communicated with the top of the hot water tank 5 through a hot water tank water replenishing pipe 17 provided with a valve C31, and the bottom of the side wall of the hot water tank 5 is respectively communicated with each bathing water outlet end of a use place through a hot water tank water outlet pipe 9 provided with a valve G27 and a pump B33; the bottom of the side wall of the hot water tank 5 is communicated with the bottom of the side wall of the auxiliary heating device 22 through an auxiliary heating water inlet pipe 23 provided with a valve G28 and a pump C34, and the bottom of the side wall of the auxiliary heating device 22 is communicated with the top of the side wall of the hot water tank 5 through an auxiliary heating water outlet pipe 24; and a wastewater tank liquid level sensor 35 is arranged at the lower part of the side wall of one side of the wastewater tank 1, and a hot water tank liquid level sensor 36 is arranged at the lower part of the side wall of one side of the hot water tank 5.
The valve D25, the valve E29, the valve F27 and the valve G28 are all manual stop valves which are kept normally open, and the valve D25, the valve E26, the valve F27 and the valve G28 are closed when being maintained.
The water tank energy storage system for preparing the bathing hot water from the bathing wastewater further comprises a PLC (programmable logic controller) 37, a PLC built-in clock 38 and an alarm 40, wherein the PLC 37 is respectively in signal connection with the auxiliary heating device 22, the valve A29, the valve B30, the valve C31, the pump A32, the pump B33, the pump C34, the wastewater tank liquid level sensor 35, the hot water tank liquid level sensor 36, the bathing wastewater water heating unit 39 and the alarm 40.
The liquid level information is respectively transmitted to the PLC 37 through signals, a clock 38 arranged in the PLC transmits time information to the PLC 37 through signals, and the bathing wastewater water heating unit 39 transmits the working state information of the bathing wastewater water heating unit 39 to the PLC 37 through signals; the PLC 37 controls the starting or closing of the valve A29, the valve B30, the pump A32, the bathing wastewater water heating unit 39, the pump B33, the valve C31, the pump C34, the auxiliary heating device 22 and the alarm 40 through signals respectively.
Referring to fig. 1 to 3, the water tank energy storage control method for preparing hot bath water from bath wastewater comprises the following steps:
1) The waste water tank liquid level sensor 35, the hot water tank liquid level sensor 36 and the PLC controller built-in clock 38 respectively transmit the corresponding waste water tank liquid level h1, the hot water tank liquid level h2 and the current time T1 to the PLC controller 37;
2) If the current time T1 is not in the water supply time period set by the PLC 37, the pump B33 on the hot water tank outlet pipe 9 of the hot water tank 5 is closed; if the current time T1 is within the water supply time period set by the PLC 37 and the PLC 37 judges that the hot water tank liquid level h2 is less than the water supply pump starting protection water level h2c of the hot water tank 5, the PLC 37 controls the alarm 40 to alarm and the pump B33 is closed; if the current time T1 is within the water supply time period set by the PLC 37 and the PLC 37 judges that the liquid level h2 of the hot water tank is greater than the sum of the water supply pump starting protective water level h2c of the hot water tank 5 and the return difference of the hot water tank, the PLC 37 controls the pump B33 to start hot water supply;
3) If the current time T1 is in the valley power time period, and the PLC 37 judges that the liquid level h2 of the hot water tank is less than the valley power heating water starting water level h2a of the hot water tank 5, and the PLC 37 judges that the liquid level h1 of the waste water tank is greater than the sum of the heating water starting water level h1a of the waste water tank 1 and the return difference of the waste water tank; or if the current time T1 is not in the valley power time period, and the PLC 37 judges that the liquid level h2 of the hot water tank is less than the emergency heating water starting water level h2b of the hot water tank 5, and the PLC 37 judges that the liquid level h1 of the waste water tank is greater than the sum of the heating water starting water level h1a of the waste water tank 1 and the return difference of the waste water tank;
the PLC 37 controls a valve A29 on the wastewater drainage pipe 8, a valve B30 on the hot water tank inlet pipe 16 of the hot water tank 5, a pump A32 on the wastewater tank outlet pipe 10 of the wastewater tank 1 and a bathing wastewater water heating unit 39 to be opened;
4) If the current time T1 is within the valley power time period, and the PLC 37 judges that the liquid level h2 of the hot water tank is greater than the sum of the valley power hot water heating starting water level h2a of the hot water tank 5 and the return difference of the hot water tank; or if the current time T1 is not within the valley power period, and the PLC controller 37 determines that the hot water tank liquid level h2 is greater than the sum of the emergency hot water heating start water level h2b of the hot water tank 5 and the return difference of the hot water tank;
the PLC 37 controls the bathing wastewater hot water making unit 39, the valve A29, the valve B30, the pump A32, the auxiliary heating device 22 communicated with the hot water tank 5, the valve C31 arranged on the hot water tank water replenishing pipe 17 communicated with the tap water pipe network 7 and the hot water tank 5, and the pump C34 arranged on the auxiliary heating water inlet pipe 23 communicated with the hot water tank 5 and the auxiliary heating device 22 to be closed;
5) If the current time T1 is within the valley electricity time period, and the PLC 37 judges that the hot water tank liquid level h2 is less than the valley electricity hot water heating starting water level h2a of the hot water tank 5, and the PLC 37 judges that the waste water tank liquid level h1 is less than the hot water heating starting water level h1a of the waste water tank 1;
the PLC controller 37 controls the bathing wastewater water heating unit 39, the valve a29, the valve B30 and the pump a32 to be closed, and the PLC controller 37 controls the valve C31, the pump C34 and the auxiliary heating device 22 to be opened;
6) If the current time T1 is in the valley power time interval, and the PLC 37 judges that the liquid level h2 of the hot water tank is less than the valley power hot water starting water level h2a of the hot water tank 5, the PLC 37 judges that the liquid level h1 of the waste water tank is greater than the hot water starting water level h1a of the waste water tank 1 and less than the sum of the hot water starting water level h1a of the waste water tank 1 and the return difference of the waste water tank, and the PLC 37 receives bath waste water and closes the hot water making unit 39;
the PLC controller 37 controls the bathing waste water heating unit 39, the valve a29, the valve B30 and the pump a32 to be closed, and the PLC controller 37 controls the valve C31, the pump C34 and the auxiliary heating device 22 to be opened.
The height difference between the heating water starting water level h1a of the waste water tank 1 and the inner bottom surface of the waste water tank 1 and the height difference between the water supply pump starting protection water level h2c of the hot water tank 5 and the inner bottom surface of the hot water tank 5 are both 0.3 m.
The height difference between the valley point electricity hot water starting water level h2a of the hot water tank 5 and the inner bottom surface of the hot water tank 5 accounts for 90% of the height of the inner cavity of the hot water tank 5.
The emergency heating water start water level h2b of the hot water tank 5 is higher than the water supply pump start protection water level h2c of the hot water tank 5.
The height difference between the emergency hot water starting water level h2b of the hot water tank 5 and the inner bottom surface of the hot water tank 5 accounts for 30% of the height of the inner cavity of the hot water tank 5.
The return difference of the waste water tank and the return difference of the hot water tank are both 5 cm.
In the process of controlling through the liquid level, if the starting value and the stopping value are the same set value, the adverse situation that the system is frequently started and stopped may occur, so a return difference value is set between the starting value and the stopping value, that is, when the measured value is lower than the set value, the system is started (or stopped), and when the measured value is higher than the set value plus the return difference value, the system is stopped (or started), so that the system can be prevented from being frequently started and stopped.
The water supply period is set by the PLC controller 37.
The volume of the waste water tank 1 and the volume of the hot water tank 5 are both more than or equal to the daily water consumption of a use place.
The bathing wastewater hot water making unit 39 comprises a heat exchanger 2 and at least one water source heat pump, wherein a wastewater tank 1 is communicated with one end of a wastewater heat exchange pipe in the heat exchanger 2 through a wastewater tank outlet pipe 10, the other end of the wastewater heat exchange pipe is communicated with an evaporator of the water source heat pump through a wastewater heat exchange outlet pipe 11 and communicated with a municipal drainage pipe network through a wastewater drainage pipe 8, a tap water pipe network 7 is communicated with one end of a tap water heat exchange pipe in the heat exchanger 2 through a tap water inlet pipe A12, and the other end of the tap water heat exchange pipe is communicated with a condenser of the water source heat pump through a tap water heat exchange outlet pipe 14 and communicated with a hot water tank 5 through a hot water tank inlet pipe 16.
The waste water tank 1 is respectively communicated with each bathing waste water collecting end of a use place through a bathing waste water pipe 6, and the hot water tank 5 is respectively communicated with each bathing water outlet end of the use place through a hot water tank water outlet pipe 9.
The auxiliary heating device 22 may use an air source heat pump, electric heating, or the like to circularly heat the apparatus for producing hot water.
This application is through storing the bathing waste water that will use throughout the day to holding water box in, at the off-peak electricity period at night to bathing waste water is the heat source, and bathing hot water is prepared to heat exchanger and water source heat pump before using, and abundant effective utilization electric wire netting low ebb electric energy can reach and reduce power load peak valley difference, participate in effects such as demand side regulation, promotion electric power system operating efficiency.
According to the design standard of water supply and drainage of buildings (GB 50015), when the capacity of a water tank of a general hot water system is designed, the capacity is based on the difference between the hot water demand and the water making capacity of equipment at the peak time of the system, and the application of a constant-trust waste heat cascade utilization water source heat pump in schools, residences and hotels is taken as an example, the volume of a waste water tank and a hot water tank which are generally configured is about 65 percent of the water consumption in the whole day.
According to the method, the waste water tank and the hot water tank are configured according to 100% of water consumption in the whole day, namely the volume of the hot water tank is = daily water consumption (m) multiplied by 100%, and the volume of the waste water tank is = daily water consumption (m) multiplied by 100%.
Taking a residential building with the daily water consumption of 20 tons (temperature rise of 30 ℃) as an example, the volumes of a waste water tank and a hot water tank are both configured as follows: 20m harvesting × 100% =20 m. Note: water density is measured according to 1 ton/m, and specific heat is measured according to 1000 kcal/ton/C (the same applies below).
Taking a water source heat pump as an example, according to the design standard of water supply and drainage of buildings (GB 50015), the working time length in the design is taken as 8 to 16 hours, but in the system, the heating capacity of the water heater is 10 hours, namely, the heating capacity of the water heater is = daily water consumption (t) multiplied by the average temperature rise (DEG C) multiplied by 1000 (big calorie/ton DEG C) divided by 10 (hour) divided by 860 (big calorie/kilowatt hour).
Taking a residential building with the daily water consumption of 20 tons (temperature rise of 30 ℃) as an example, the heating capacity of the configured water heater is as follows: 20 (ton) × 30 (° c) × 1000 (kcal/ton ℃) ÷ 10 (hours) ÷ 860 (kcal/kwh) =69.8 (kilowatts).
In the prior hot water system, in the daytime, particularly in the peak time of water consumption (generally at nights of 7 to 9 ℃), equipment must be started to prepare and supplement hot water so as to be convenient for people in a use place to use; the method works only in the valley electricity time period in the evening (for example, 22:000 to 8:00 in the next day, the valley electricity time periods in different regions may be different, and manual setting can be performed according to different times of the valley electricity time periods in specific regions).
Taking the waste heat cascade utilization water source heat pump water heater of the applicant as an example, under the conditions that the annual average COP is about 6.0, the annual average used electric heating auxiliary heat is about 3%, the annual average hot water temperature rises to 30 ℃, the energy consumption of each ton of hot water is about 6.8kW.h, the energy cost of each ton of hot water is about 3.59 yuan in terms of Jiangsu electricity price of 0.5283 yuan/kw.h, and if an energy storage scheme is used, the energy cost of the heating water is 6.8kW.h multiplied by 0.3583 yuan/kw.h =2.44 yuan/ton in terms of Jiangsu valley electricity price of 0.3583 yuan/kw.h.
Use 20 tons of daily water consumption to count, hot-water tank and the waste water case that dispose are 13m heavy planting when not considering the energy storage, consider after the energy storage, hot-water tank and the waste water case that increase respectively for 7m thin year, increase the cost and be about 7m thin year 1100 yuan/m and thin year x 2= 15400 yuan, the electric charge that saves every day is about: 20 ton x (3.59 yuan/ton-2.44 yuan/ton) =23 yuan, and the annual return on investment is about: 360 days × 23 yuan/day ÷ 15400 yuan × 100% =54%, that is, about 1.8 years of return investment.
Claims (10)
1. The water tank energy storage control method for preparing the hot bath water from the bath wastewater is characterized by comprising the following steps of:
1) A waste water tank liquid level sensor (35), a hot water tank liquid level sensor (36) and a PLC controller built-in clock (38) respectively transmit the corresponding waste water tank liquid level h1, hot water tank liquid level h2 and current time T1 to a PLC controller (37);
2) If the current time T1 is not in the water supply time period set by the PLC (37), closing a pump B (33) on a hot water tank outlet pipe (9) of the hot water tank (5); if the current time T1 is within the water supply time interval set by the PLC (37) and the PLC (37) judges that the liquid level h2 of the hot water tank is less than the water supply pump starting protection water level h2c of the hot water tank (5), the PLC (37) controls an alarm (40) to give an alarm and a pump B (33) is closed; if the current time T1 is in the water supply time interval set by the PLC (37) and the PLC (37) judges that the liquid level h2 of the hot water tank is greater than the sum of the water supply pump starting protection water level h2c of the hot water tank (5) and the return difference of the hot water tank, the PLC (37) controls the pump B (33) to start hot water supply;
3) If the current time T1 is in the valley electricity time period, and the PLC (37) judges that the liquid level h2 of the hot water tank is less than the valley electricity water heating starting water level h2a of the hot water tank (5), and the PLC (37) judges that the liquid level h1 of the waste water tank is greater than the sum of the water heating starting water level h1a of the waste water tank (1) and the return difference of the waste water tank; or if the current time T1 is not in the valley electricity time period, and the PLC (37) judges that the liquid level h2 of the hot water tank is less than the emergency hot water starting water level h2b of the hot water tank (5), and the PLC (37) judges that the liquid level h1 of the waste water tank is more than the sum of the hot water starting water level h1a of the waste water tank (1) and the return difference of the waste water tank;
the PLC (37) controls a valve A (29) on the waste water drain pipe (8), a valve B (30) on a hot water tank inlet pipe (16) of the hot water tank (5), a pump A (32) on a waste water tank outlet pipe (10) of the waste water tank (1) and a bathing waste water heating unit (39) to be opened;
4) If the current time T1 is within the valley electricity time period, and the PLC (37) judges that the liquid level h2 of the hot water tank is greater than the sum of the valley electricity hot water heating starting water level h2a of the hot water tank (5) and the return difference of the hot water tank; or if the current time T1 is not in the valley power time period, and the PLC (37) judges that the liquid level h2 of the hot water tank is greater than the sum of the emergency hot water heating starting water level h2b of the hot water tank (5) and the return difference of the hot water tank;
the PLC (37) controls the bathing wastewater water heating unit (39), the valve A (29), the valve B (30), the pump A (32), the auxiliary heating device (22) communicated with the hot water tank (5), the valve C (31) arranged on the hot water tank water replenishing pipe (17) communicated with the tap water pipe network (7) and the hot water tank (5), and the pump C (34) arranged on the auxiliary heating water inlet pipe (23) communicated with the hot water tank (5) and the auxiliary heating device (22) to be closed;
5) If the current time T1 is within the valley electricity time period, and the PLC (37) judges that the liquid level h2 of the hot water tank is smaller than the valley electricity water heating starting water level h2a of the hot water tank (5), and the PLC (37) judges that the liquid level h1 of the waste water tank is smaller than the water heating starting water level h1a of the waste water tank (1);
the PLC (37) controls the bathing wastewater water heating unit (39), the valve A (29), the valve B (30) and the pump A (32) to be closed, and the PLC (37) controls the valve C (31), the pump C (34) and the auxiliary heating device (22) to be opened;
6) If the current time T1 is in the valley electricity time period, and the PLC (37) judges that the liquid level h2 of the hot water tank is smaller than the valley electricity water heating starting water level h2a of the hot water tank (5), the PLC (37) judges that the liquid level h1 of the waste water tank is larger than the water heating starting water level h1a of the waste water tank (1) and smaller than the sum of the water heating starting water level h1a of the waste water tank (1) and the return difference of the waste water tank, and the PLC (37) receives bath waste water and water heating unit (39) and closes;
the PLC (37) controls the bathing wastewater water heating unit (39), the valve A (29), the valve B (30) and the pump A (32) to be closed, and the PLC (37) controls the valve C (31), the pump C (34) and the auxiliary heating device (22) to be opened.
2. The method for controlling the energy storage in the water tank for preparing hot bath water from bath wastewater according to claim 1, wherein the method comprises the following steps: the height difference between the hot water making starting water level h1a of the waste water tank (1) and the inner bottom surface of the waste water tank (1) and the height difference between the water supply pump starting protection water level h2c of the hot water tank (5) and the inner bottom surface of the hot water tank (5) are both within the range of 0.2-0.5 m.
3. The method for controlling the energy storage in the water tank for preparing hot bath water from bath wastewater according to claim 1, wherein the method comprises the following steps: the height difference between the valley point electricity hot water heating starting water level h2a of the hot water tank (5) and the inner bottom surface of the hot water tank (5) accounts for 80-90% of the height of the inner cavity of the hot water tank (5).
4. The method for controlling the energy storage of the water tank for preparing hot bath water from the bath wastewater as claimed in claim 1, wherein the method comprises the following steps: the emergency hot water making starting water level h2b of the hot water tank (5) is higher than the water supply pump starting protection water level h2c of the hot water tank (5).
5. The method for controlling the energy storage of the water tank for preparing hot bath water from the bath wastewater as claimed in claim 4, wherein the method comprises the following steps: the height difference between the emergency hot water making starting water level h2b of the hot water tank (5) and the inner bottom surface of the hot water tank (5) accounts for 30-40% of the height of the inner cavity of the hot water tank (5).
6. The method for controlling the energy storage in the water tank for preparing hot bath water from bath wastewater according to claim 1, wherein the method comprises the following steps: and the return difference of the waste water tank and the return difference of the hot water tank are both in the range of 3 to 8 centimeters.
7. The method for controlling the energy storage of the water tank for preparing hot bath water from the bath wastewater as claimed in claim 1, wherein the method comprises the following steps: the water supply period is set by a PLC (37).
8. The method for controlling the energy storage in the water tank for preparing hot bath water from bath wastewater according to claim 1, wherein the method comprises the following steps: the volume of the waste water tank (1) and the volume of the hot water tank (5) are both more than or equal to the daily water consumption of a use place.
9. The method for controlling the energy storage of the water tank for preparing hot bath water from the bath wastewater as claimed in claim 1, wherein the method comprises the following steps: the bathing wastewater hot water making unit (39) comprises a heat exchanger (2) and at least one water source heat pump, wherein a wastewater tank (1) is communicated with one end of a wastewater heat exchange pipe in the heat exchanger (2) through a wastewater tank outlet pipe (10), the other end of the wastewater heat exchange pipe is communicated with an evaporator of the water source heat pump through a wastewater heat exchange outlet pipe (11) and communicated with a municipal drainage pipe network through a wastewater drainage pipe (8), a tap water pipe network (7) is communicated with one end of a tap water heat exchange pipe in the heat exchanger (2) through a tap water inlet pipe A (12), and the other end of the tap water heat exchange pipe is communicated with a condenser of the water source heat pump through a tap water heat exchange outlet pipe (14) and communicated with a hot water tank (5) through a hot water tank inlet pipe (16).
10. The method for controlling the energy storage in the water tank for preparing hot bath water from bath wastewater according to claim 1, wherein the method comprises the following steps: the waste water tank (1) is respectively communicated with each bathing waste water collecting end of a use place through a bathing waste water pipe (6), and the hot water tank (5) is respectively communicated with each bathing water outlet end of the use place through a hot water tank water outlet pipe (9).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073474A1 (en) * | 2004-01-29 | 2005-08-11 | Energiatehnika OU | Waste water piping with heat exchanger for bathing installations |
| CN105157099A (en) * | 2015-09-02 | 2015-12-16 | 张林平 | Hot water supply system |
| CN105509315A (en) * | 2016-01-13 | 2016-04-20 | 大连中盈能源管理有限公司 | Water source heat pump and plate heat exchanger combined heat recovery system and control method thereof |
| CN110925864A (en) * | 2019-12-04 | 2020-03-27 | 江苏恒信诺金科技股份有限公司 | System for efficiently utilizing building collected and dispersed bathing waste water to prepare hot water |
| CN217383088U (en) * | 2021-12-30 | 2022-09-06 | 四川协成电力工程设计有限公司 | Sewage recovery energy storage heating system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005073474A1 (en) * | 2004-01-29 | 2005-08-11 | Energiatehnika OU | Waste water piping with heat exchanger for bathing installations |
| CN105157099A (en) * | 2015-09-02 | 2015-12-16 | 张林平 | Hot water supply system |
| CN105509315A (en) * | 2016-01-13 | 2016-04-20 | 大连中盈能源管理有限公司 | Water source heat pump and plate heat exchanger combined heat recovery system and control method thereof |
| CN110925864A (en) * | 2019-12-04 | 2020-03-27 | 江苏恒信诺金科技股份有限公司 | System for efficiently utilizing building collected and dispersed bathing waste water to prepare hot water |
| CN217383088U (en) * | 2021-12-30 | 2022-09-06 | 四川协成电力工程设计有限公司 | Sewage recovery energy storage heating system |
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