WO2024061391A1 - A method of regulating the temperature of domestic hot water and circulating heating system for its implementation - Google Patents

A method of regulating the temperature of domestic hot water and circulating heating system for its implementation Download PDF

Info

Publication number
WO2024061391A1
WO2024061391A1 PCT/CZ2023/000037 CZ2023000037W WO2024061391A1 WO 2024061391 A1 WO2024061391 A1 WO 2024061391A1 CZ 2023000037 W CZ2023000037 W CZ 2023000037W WO 2024061391 A1 WO2024061391 A1 WO 2024061391A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
temperature
heating
utility water
circulation
Prior art date
Application number
PCT/CZ2023/000037
Other languages
French (fr)
Inventor
Pavel Koudelka
Original Assignee
Pavel Koudelka
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pavel Koudelka filed Critical Pavel Koudelka
Publication of WO2024061391A1 publication Critical patent/WO2024061391A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0078—Recirculation systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F24H15/34—Control of the speed of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/25—Arrangement or mounting of control or safety devices of remote control devices or control-panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors

Definitions

  • a method of regulating the temperature of domestic hot water and a circulating heating system for its implementation is a method of regulating the temperature of domestic hot water and a circulating heating system for its implementation.
  • the invention relates to a method of regulating the temperature of water, specifically to a method of regulating the temperature of domestic hot water circulating in the heating circulation system of the central domestic hot water heating system to at least one consumption point, and the heating system for its implementation.
  • DHW Central heating of domestic hot water
  • buildings and industrial solutions which reduce the costs of the heating system. This is then one for an entire building (system), Centrally prepared hot water is distributed to individual consumption points (users).
  • this solution brings an increase in heating costs, because the DHW line is burdened with losses, which represent a 60% increase in the heating costs of the whole of the DHW.
  • heating circulation systems are known for bringing of domestic hot water to individual consumption points, where the temperature of the water in the domestic hot water storage tank Is set precisely, with the water from the storage tank flawing through the circulation system towards the individual consumption points. Therefore, in order for the water to reliably have the required temperature at the individual consumption points, the water in these systems must keep circulating through the heating circulation system, In the course of circulation, the water gradually loses its temperature and must therefore be constantly reheated in the tank. This is very demanding on energy consumption.
  • Timed cycling of hot water circulation through the heating circulation system is used to reduce energy consumption. But this reduces comfort and Is not precise, because the temperature of the water is unstable in the circulation system, while it can be lower than the minimum required temperature at the consumption point. Since the temperature of the domestic hot water at the outlet of the storage tank is higher than the temperature required at the individual consumption point during the timed circulation, costs increase. Since the consumption of hot water from the circulation system is also not taken into account, there is also an increase in the costs of circulation in the building.
  • a device for heating of domestic hot water Is known from patent document CZ 1991-605.
  • This device for heating of domestic hot water makes up an additional part to the heating boiler, which is equipped with a boiler thermostat.
  • a vertically arranged exchanger tank is connected to the heating boiler as well, which is internally equipped with a spirally arranged heat-carrying medium, connected in front of the heat-carrying medium outlet from the heating boiler and opening into its lower part.
  • the heat exchanger tank is equipped with a utility water inlet in the lower part and a utility water outlet in the upper part.
  • a device for heating hot water in buildings with central water distribution consisting of a first part made up of a storage tank with a supply of waste water from the building and the second part made up of a heat pump, a storage tank, and a control unit box, while an evaporator of the heat pump is arranged in the waste water storage tank and the heat pump is connected to the hot water insert arranged in the storage tank equipped with an electric heating insert, a cold water distribution pipe and a hot water supply pipe.
  • a method of regulating the temperature of utility water circulating in the heating circulation of the central domestic hot water system to at least one consumption point where the heating circulation system further contains a means for the circulation of utility water and a tank of utility water with a means for heating of domestic hot water, according to the invention, characterised by that at the last consumption point, or in its immediate vicinity, in the direction of flow of utility water through the heating circulation system, the utility water temperature is continuously measured by a utility water temperature gauge, connected to a control unit, with the rate of circulation of domestic hot water through the circulation system being regulated by the control unit, connected to the means for circulating of domestic hot water, so that the control unit controls the performance of the means for circulating of domestic hot water in such a way that the temperature of domestic hot water beyond the last consumption point has a constant temperature.
  • the advantage is that it is possible to minimise losses on the reheating of domestic hot water, as known in the systems currently in use. Practically the same results are obtained when the temperature is measured in the immediate vicinity of the last consumption point, preferably as close as possible beyond it, in the direction of the flow of utility water through the heating circulation system.
  • This solution enables implementation with minimal costs and with minimal interventions in the heating system, therefore it can also be used for additional implementation in existing systems.
  • the circulation speed will increase when the temperature of the utility water drops, and conversely, when the temperature rises, the circulation speed of the domestic hot water will decrease.
  • the advantage is that due to the precise maintenance of the set temperature, losses are minimised, while the set temperature of the utility water at the consumption point is maintained. It is also to advantage that the losses in the return pipe are the lowest possible, regardless of the temperature of the water in the tank, and thus the losses in the supply pipe are also the lowest possible, because when the temperature in the tank increases, the temperature in the return pipe does not increase.
  • the constant temperature of the utility water beyond the last consumption point is at least 40°C. This temperature is the lowest subjectively perceived as warm.
  • a heating circulation system of domestic hot water to at least one consumption point which further contains a means for circulating utility water and a tank of utility water with a means for heating utility water, for carrying out the above-mentioned method water temperature regulation, characterised by that, according to the invention, a domestic hot water temperature gauge is arranged at the last consumption point, or in its immediate vicinity, in the direction of the flow of utility water through the heating circulation system, which is connected to the control unit, which is connected to the means for domestic hot water circulation.
  • a domestic hot water temperature gauge is arranged at the last consumption point, or in its immediate vicinity, in the direction of the flow of utility water through the heating circulation system, which is connected to the control unit, which is connected to the means for domestic hot water circulation.
  • control unit is connected to the utility water temperature gauge in the utility water tank.
  • the advantage is that it is possible to predict the consumption of heat at a time when there is no consumption, but the water in the pipes must be prepared for random consumption. It is then possible to determine whether the heat supply will last until the time when there is cheaper energy.
  • control unit is connected to a means for heating utility water. It is thus passible to simply monitor the amount of energy supplied to the system and subsequently determine the amount of energy required to be supplied to the system.
  • the main advantage of the invention is that, thanks to the control of the speed of the circulation according to the temperature at the last consumption paint, there will be significant savings in the energy consumed, as well as a reduction in the costs of the circulation of domestic htt water. At the same time, the cost of circulating utility water in the heating system will be reduced by up to 50%.
  • the heating circulation system according to the invention can also adapt circulation to the need for a timed reserve so that the delivered amount of energy is exactly what is needed and is not higher due to the time differentiation of energy prices.
  • fig. 1 schematically shows the connection of a heating system that has four consumption points
  • fig. 2 schematically shows the connection of a heating system that has one consumption point.
  • the heating circulation system 6 of the central heating system of circulating utility water contains four consumption points 2, which are arranged on the circulation system 6 beyond the storage tank 4 of domestic hot water, which is a boiler, which contains a means 5 for the heating of utility water.
  • a means 8 for circulating utility water is arranged on the circulating system 6, between the last consumption point 2.4 and the tank 4 of domestic hot water.
  • the tank 4 of domestic hot water contains an intake 10 of cold water.
  • a gauge 1 of the temperature of the domestic hot water is arranged, which is connected to a control unit 7, which is connected to the means 8 for the circulation of domestic hot water.
  • the control unit 7 is connected to the utility water temperature gauge 9 in the utility water tank 4.
  • the control unit 7 is further connected to the means 5 for heating utility water.
  • the utility water temperature is continuously measured by the utility water temperature gauge 1 with the rate of circulation of utility water through the circulation system 6 being regulated so that the temperature of utility water beyond the last consumption point 2n has a constant temperature of 40°C.
  • the circulation speed of the domestic hot water through the circulation system 6 changes when the service water temperature drops or rises at the last consumption point 2.4 by more than 5% compared to the set constant temperature, while the circulation speed increases when the utility water temperature drops and, conversely, when the temperature rises, the speed the circulation of the domestic hot water will decrease.
  • the heating circulation system 6 works practically in such a way that the circulation runs continuously and the temperature of the utility water at the last consumption point 2.4 is continuously measured, while if the temperature exceeds a temperature of 40°C by 5%, the circulation slows down or stops. If the water temperature drops by 5% below 40°C, the circulation will speed up.
  • the heating circulation system 6 of the central heating system of circulating utility water contains one consumption point 2, which is arranged on the circulation system 6 beyond the tank 4 of domestic hot water, which is a boiler, which contains a means 5 for heating utility water.
  • a means 8 for the circulation of utility water is arranged on the circulating system 6, between the only and therefore also the last consumption point 2 and the storage tank 4 of domestic hot water .
  • the tank 4 of domestic hot water contains an intake 10 of cold water.
  • a gauge 1 of the temperature of the domestic hot water is arranged, which is connected to the control unit 7, which is connected to the means 8 for the circulation of domestic hot water.
  • the control unit 7 is connected to the utility water temperature gauge 9 in the utility water tank 4.
  • the control unit 7 is further connected to the means 5 for heating utility water.
  • the circulation speed of the domestic hot water through the circulation system 6 changes when the utility water temperature drops or rises at the last consumption point 2 by more than 5% compared to the set constant temperature, while the circulation speed increases when ths utility water temperature drops and, conversely, when the temperature rises, the circulation speed the circulation of the domestic hot water will decrease.
  • the method of regulating water temperature and the heating system can be used to regulate the temperature of utility water, in family as well as residential and industrial buildings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

A method of regulating the temperature of the utility water circulating in the heating circulation system (6) of the central domestic hot water heating system to at least one consumption point (2), where the heating circulation system (6) further includes a means (8) for utility water circulation and a storage tank (4) of utility water with a means (5) for heating utility water, according to which the temperature of the utility water is measured at the last consumption point (2n), in the direction of flow of utility water through the heating circulation system (6), continuously, with a gauge (1) of utility water temperature is measured with the rate of circulation of utility water through the circulation system (6) being regulated in such a way that the temperature of utility water beyond the last consumption point (2) has a constant temperature. The heating circulation system (6) of the central utility water heating system circulating to at least one consumption point (2), which further comprises a means (8) for the circulation of utility water and a storage tank (4) of utility water with a means (5) for heating the utility water, where at the last consumption point (2n), in the direction of flow of utility water through the heating circulation system (6), is arranged a gauge (1) of the temperature of utility water, which is connected to the control unit (7), which is connected to the means (8) for the circulation of domestic hot water.

Description

A method of regulating the temperature of domestic hot water and a circulating heating system for its implementation.
Technical Field
The invention relates to a method of regulating the temperature of water, specifically to a method of regulating the temperature of domestic hot water circulating in the heating circulation system of the central domestic hot water heating system to at least one consumption point, and the heating system for its implementation.
State of the Art
Central heating of domestic hot water (hereinafter DHW) is used in buildings and industrial solutions, which reduce the costs of the heating system. This is then one for an entire building (system), Centrally prepared hot water is distributed to individual consumption points (users). However, this solution brings an increase in heating costs, because the DHW line is burdened with losses, which represent a 60% increase in the heating costs of the whole of the DHW.
Currently, heating circulation systems are known for bringing of domestic hot water to individual consumption points, where the temperature of the water in the domestic hot water storage tank Is set precisely, with the water from the storage tank flawing through the circulation system towards the individual consumption points. Therefore, in order for the water to reliably have the required temperature at the individual consumption points, the water in these systems must keep circulating through the heating circulation system, In the course of circulation, the water gradually loses its temperature and must therefore be constantly reheated in the tank. This is very demanding on energy consumption.
Timed cycling of hot water circulation through the heating circulation system is used to reduce energy consumption. But this reduces comfort and Is not precise, because the temperature of the water is unstable in the circulation system, while it can be lower than the minimum required temperature at the consumption point. Since the temperature of the domestic hot water at the outlet of the storage tank is higher than the temperature required at the individual consumption point during the timed circulation, costs increase. Since the consumption of hot water from the circulation system is also not taken into account, there is also an increase in the costs of circulation in the building.
A device for heating of domestic hot water Is known from patent document CZ 1991-605. This device for heating of domestic hot water makes up an additional part to the heating boiler, which is equipped with a boiler thermostat. A vertically arranged exchanger tank is connected to the heating boiler as well, which is internally equipped with a spirally arranged heat-carrying medium, connected in front of the heat-carrying medium outlet from the heating boiler and opening into its lower part. The heat exchanger tank is equipped with a utility water inlet in the lower part and a utility water outlet in the upper part.
From another patent document CZ 2010-672, a device for heating hot water in buildings with central water distribution is known, consisting of a first part made up of a storage tank with a supply of waste water from the building and the second part made up of a heat pump, a storage tank, and a control unit box, while an evaporator of the heat pump is arranged in the waste water storage tank and the heat pump is connected to the hot water insert arranged in the storage tank equipped with an electric heating insert, a cold water distribution pipe and a hot water supply pipe.
From the patent document JP20082411130, a design solution is known that solves the minimisation of the diversion of utility water before water of the required temperature starts flowing from the pipes. This design solution allows setting a requirement for a different utility water temperature at each consumption point, which means that if the water heating is central, the water temperature in the system must be approximately such as to meet the demand of the consumption point with the highest temperature. Hot and cold water is mixed at the output point. The disadvantage of this solution is that utility water must flow in the system, the temperature of which is higher than the required temperature of most consumption points. This, of course, means higher heat losses and therefore also higher energy consumption for domestic hot water.
From the above-mentioned state of the art, it is clear that the current state of the art has quite a number of disadvantages, with the biggest disadvantage of the known methods of water temperature regulation being that they are very energy- intensive, and due to the way they function, have large energy losses. The goal of the invention is to create an effective way of regulating water temperature, which will be cheap to manufacture, while enabling significant energy savings.
Principle of the Invention
The stated shortcomings are largely eliminated and the goals of the invention are fulfilled by a method of regulating the temperature of utility water circulating in the heating circulation of the central domestic hot water system to at least one consumption point, where the heating circulation system further contains a means for the circulation of utility water and a tank of utility water with a means for heating of domestic hot water, according to the invention, characterised by that at the last consumption point, or in its immediate vicinity, in the direction of flow of utility water through the heating circulation system, the utility water temperature is continuously measured by a utility water temperature gauge, connected to a control unit, with the rate of circulation of domestic hot water through the circulation system being regulated by the control unit, connected to the means for circulating of domestic hot water, so that the control unit controls the performance of the means for circulating of domestic hot water in such a way that the temperature of domestic hot water beyond the last consumption point has a constant temperature. The advantage is that it is possible to minimise losses on the reheating of domestic hot water, as known in the systems currently in use. Practically the same results are obtained when the temperature is measured in the immediate vicinity of the last consumption point, preferably as close as possible beyond it, in the direction of the flow of utility water through the heating circulation system. This solution enables implementation with minimal costs and with minimal interventions in the heating system, therefore it can also be used for additional implementation in existing systems. it is to advantage if the speed of circulation of heating utility water through the circulation system is changed by a control unit, by regulating the performance of the means for circulation of utility water, when the utility water temperature at the last consumption point drops or rises by more than 5% compared to the set constant temperature. The circulation speed will increase when the temperature of the utility water drops, and conversely, when the temperature rises, the circulation speed of the domestic hot water will decrease. The advantage is that due to the precise maintenance of the set temperature, losses are minimised, while the set temperature of the utility water at the consumption point is maintained. It is also to advantage that the losses in the return pipe are the lowest possible, regardless of the temperature of the water in the tank, and thus the losses in the supply pipe are also the lowest possible, because when the temperature in the tank increases, the temperature in the return pipe does not increase.
Furthermore, it is to advantage if the constant temperature of the utility water beyond the last consumption point is at least 40°C. This temperature is the lowest subjectively perceived as warm.
Furthermore, the stated shortcomings are largely eliminated and the goals of the invention are fulfilled by a heating circulation system of domestic hot water to at least one consumption point which further contains a means for circulating utility water and a tank of utility water with a means for heating utility water, for carrying out the above-mentioned method water temperature regulation, characterised by that, according to the invention, a domestic hot water temperature gauge is arranged at the last consumption point, or in its immediate vicinity, in the direction of the flow of utility water through the heating circulation system, which is connected to the control unit, which is connected to the means for domestic hot water circulation. The advantage of this arrangement is maintaining a constant temperature in the return pipe.
It is to advantage if the control unit is connected to the utility water temperature gauge in the utility water tank. The advantage is that it is possible to predict the consumption of heat at a time when there is no consumption, but the water in the pipes must be prepared for random consumption. It is then possible to determine whether the heat supply will last until the time when there is cheaper energy.
Furthermore, it is io advantage if the control unit is connected to a means for heating utility water. It is thus passible to simply monitor the amount of energy supplied to the system and subsequently determine the amount of energy required to be supplied to the system.
The main advantage of the invention is that, thanks to the control of the speed of the circulation according to the temperature at the last consumption paint, there will be significant savings in the energy consumed, as well as a reduction in the costs of the circulation of domestic htt water. At the same time, the cost of circulating utility water in the heating system will be reduced by up to 50%. The heating circulation system according to the invention can also adapt circulation to the need for a timed reserve so that the delivered amount of energy is exactly what is needed and is not higher due to the time differentiation of energy prices.
Overview of the Figures
The invention will be explained in closer detail with the help of drawings, in which fig. 1 schematically shows the connection of a heating system that has four consumption points, and fig. 2 schematically shows the connection of a heating system that has one consumption point.
Examples of the Performance of the Invention
Example 1
The heating circulation system 6 of the central heating system of circulating utility water (fig. 1) contains four consumption points 2, which are arranged on the circulation system 6 beyond the storage tank 4 of domestic hot water, which is a boiler, which contains a means 5 for the heating of utility water. On the circulating system 6, between the last consumption point 2.4 and the tank 4 of domestic hot water, a means 8 for circulating utility water is arranged. The tank 4 of domestic hot water contains an intake 10 of cold water.
At the last consumption point 2,4 in the direction of flow of utility water through the heating circulation system 6, a gauge 1. of the temperature of the domestic hot water is arranged, which is connected to a control unit 7, which is connected to the means 8 for the circulation of domestic hot water.
The control unit 7 is connected to the utility water temperature gauge 9 in the utility water tank 4.
The control unit 7 is further connected to the means 5 for heating utility water.
According to the method of regulating the temperature of the utility water circulating in the above-mentioned heating circulation system 6 of the central domestic hot water system, at the last consumption point 2,4, in the direction of the service water flow through the heating circulation system 6, the utility water temperature is continuously measured by the utility water temperature gauge 1 with the rate of circulation of utility water through the circulation system 6 being regulated so that the temperature of utility water beyond the last consumption point 2n has a constant temperature of 40°C.
The circulation speed of the domestic hot water through the circulation system 6 changes when the service water temperature drops or rises at the last consumption point 2.4 by more than 5% compared to the set constant temperature, while the circulation speed increases when the utility water temperature drops and, conversely, when the temperature rises, the speed the circulation of the domestic hot water will decrease.
The heating circulation system 6 works practically in such a way that the circulation runs continuously and the temperature of the utility water at the last consumption point 2.4 is continuously measured, while if the temperature exceeds a temperature of 40°C by 5%, the circulation slows down or stops. If the water temperature drops by 5% below 40°C, the circulation will speed up.
The above-mentioned design solution of the heating circulation system 6 and the method of regulating the temperature of the utility water circulating in this heating circulation system 6 reduces the energy requirement for circulation operation as follows:
Savings calculation for DN20 pipes:
Standard 55°C U = 0.18W/m2K
40°C U = 0.174W/m2K
30°C U = 0.172W/m2K
Savings calculation for DN40 pipes:
Standard 55°C U = 0.27W/m2K
40°C U = 0.262W/m2K
30°C U = 0.258W/m2K
Loss in DN20 pipes
Q = U . I. (tpotr - tint)
Q55 = 0.18.1 .(55-20) = 6.3W/m
Q40 = 0.174.1.(40-20) = 3.48W/m
Q30 = 0.18.1 .(30-20) = 1.72W/m Loss in a DN40 pipes
Q = U . I. (tpotr - tint)
Q55 = 0.27.1.(55-20) = 9,45W/m
Q40 = 0.262.1.(40-20) = 5.24W/m
Q30 = 0.258.1.(30-20) = 2.58W/m
If the temperature in the pipes is 55°C in 1/3 of the length, 40°C in the other 1/3 and
30°C in the other 1/3, the total savings will be:
Q55 = 0.27.1 .(55-20) = 9.45W7m 9.45-9.45 = 0w/m
Q40 = 0.262.1.(40-20) = 5.24W/m 9.45-5.24 = 4,21 w/m
Q30 = 0,258.1.(30-20) = 2.58W/m 9.45-2.58 = 6.87w/m
This results in a savings of 11 ,08w/m, which is 40% less.
For a house that needs 1000l per day: annual costs for domestic hot water heating according to the standard: 15,975 kWh annual costs for domestic hot water heating with circulation according to the standard:25,560 kWh annual cost of domestic hot water heating with circulation using the invention:
21,726kWh
This saving is achieved only by changing the regulation, that is at almost no cost. For the given house, at an energy price of CZK 8 per 1 kWh, the invention represents a savings of CZK 30,600/year.
Example 2
The heating circulation system 6 of the central heating system of circulating utility water (fig. 2) contains one consumption point 2, which is arranged on the circulation system 6 beyond the tank 4 of domestic hot water, which is a boiler, which contains a means 5 for heating utility water. On the circulating system 6, between the only and therefore also the last consumption point 2 and the storage tank 4 of domestic hot water a means 8 for the circulation of utility water is arranged. The tank 4 of domestic hot water contains an intake 10 of cold water. At this last consumption point 2 in the direction of the flow of utility water through the heating circulation system 6, a gauge 1 of the temperature of the domestic hot water is arranged, which is connected to the control unit 7, which is connected to the means 8 for the circulation of domestic hot water.
The control unit 7 is connected to the utility water temperature gauge 9 in the utility water tank 4.
The control unit 7 is further connected to the means 5 for heating utility water.
According to the method of regulating the temperature of the utility water circulating in the above-mentioned heating circulation system 6 of the central domestic hot water system, at the last consumption point 2, in the direction of the utility water flow through the heating circulation system 6, the utility water temperature Is continuously measured by the utility water temperature gauge 1 with the rate of circulation of utility water through the circulation system 6 being regulated so that the temperature of utility water beyond the last consumption point 2 has a constant temperature of 45°C.
The circulation speed of the domestic hot water through the circulation system 6 changes when the utility water temperature drops or rises at the last consumption point 2 by more than 5% compared to the set constant temperature, while the circulation speed increases when ths utility water temperature drops and, conversely, when the temperature rises, the circulation speed the circulation of the domestic hot water will decrease.
Industrial Application
The method of regulating water temperature and the heating system, according to the invention, can be used to regulate the temperature of utility water, in family as well as residential and industrial buildings. List of Reference Marks
1 utility water temperature gauge
2,1,2,2,.., consumption point
2n last consumption point
4 utility water tank
5 means for heating utility water
6 heating circulation system
7 control unit
8 means for the circulating of utility water
9 utility water temperature gauge in the utility water tank
10 cold water intake

Claims

Patent Claims
1. A method of regulating the temperature of the utility water circulating in a heating circulation system (6) of the central domestic hot water system to at least one consumption point (2), where the heating circulation system (6) further includes a means (8) for utility water circulation and a tank (4) of utility water with a means (5) for heating the utility water, characterised by that at the last consumption point (2n), in the direction of flow of utility water through the heating circulation system (6), is continuously measured by a utility water temperature gauge (1) connected to the control unit (7) the utility water temperature and, with this the utility water circulation speed through the circulation system (6) is the control unit (7), connected to the means (8) for the utility water circulation, regulated in such a way that by the control unit (7) the performance of the means (8) for the circulation of utility water is regulated in such a way that the temperature of the utility water beyond the last consumption point (2n) has a constant temperature.
2. The method of water temperature regulation, according to claim 1, characterised by that the rate of circulation of domestic hot water through the circulation system (6) is changed by the control unit (7). by regulating the performance of the means (8) for utility water circulation, when the temperature of the utility water at the last consumption point (2n) drops or rises by more than 5% compared to the set constant temperature.
3. The method of water temperature regulation, according to either one of claims 1 and 2, characterised by that the constant temperature is at least 40°C.
4. The heating circulation system (6) of the central domestic hot water heating system circulating to at least one consumption point (2), which further contains a means (8) for the circulation of utility water and a tank (4) of utility water with a means (5) for heating the utility water, for implementation of the method of water temperature regulation according to any one of claims 1 to 3, characterised by that at the last consumption point (2n), in the direction of flow of utility water through the heating circulation system (6) , a gauge (1) of the temperature of the domestic hot water is arranged, which is connected to the control unit (7), which is connected to the means (8) for the circulation of the domestic hot water.
5. The heating circulation system, according to claim 4, characterised by that the control unit (7) is connected to the utility water temperature gauge (9) in the tank (4) of utility water.
6. The heating circulation system, according to either one of claims 4 or 5, characterised by that the control unit (7) is connected to the means (5) for heating utility water.
PCT/CZ2023/000037 2022-09-20 2023-09-07 A method of regulating the temperature of domestic hot water and circulating heating system for its implementation WO2024061391A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2022-400A CZ2022400A3 (en) 2022-09-20 2022-09-20 A method of water temperature control and a heating system to perform it
CZPV2022-400 2022-09-20

Publications (1)

Publication Number Publication Date
WO2024061391A1 true WO2024061391A1 (en) 2024-03-28

Family

ID=88290767

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2023/000037 WO2024061391A1 (en) 2022-09-20 2023-09-07 A method of regulating the temperature of domestic hot water and circulating heating system for its implementation

Country Status (2)

Country Link
CZ (1) CZ2022400A3 (en)
WO (1) WO2024061391A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3522344C2 (en) * 1985-06-22 1990-04-26 Fa. Rud. Otto Meyer, 2000 Hamburg, De
DE19718469A1 (en) * 1997-04-30 1998-11-12 Josef Krimbacher Control for domestic water circulation
JP2008241130A (en) * 2007-03-27 2008-10-09 Rui-Zong Huang Hot water supply system
US20100089339A1 (en) * 2008-10-09 2010-04-15 Krause Timothy D System and method for controlling a pump in a recirculating hot water system
EP2775221B1 (en) * 2013-03-08 2018-09-05 Pompes Salmson Regulation of the flow and temperature of a sanitary hot water circulator
US20220205682A1 (en) * 2020-12-30 2022-06-30 Dong Yong Hot Water System Inc. Smart circulation control instantaneous-heating storage heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3522344C2 (en) * 1985-06-22 1990-04-26 Fa. Rud. Otto Meyer, 2000 Hamburg, De
DE19718469A1 (en) * 1997-04-30 1998-11-12 Josef Krimbacher Control for domestic water circulation
JP2008241130A (en) * 2007-03-27 2008-10-09 Rui-Zong Huang Hot water supply system
US20100089339A1 (en) * 2008-10-09 2010-04-15 Krause Timothy D System and method for controlling a pump in a recirculating hot water system
EP2775221B1 (en) * 2013-03-08 2018-09-05 Pompes Salmson Regulation of the flow and temperature of a sanitary hot water circulator
US20220205682A1 (en) * 2020-12-30 2022-06-30 Dong Yong Hot Water System Inc. Smart circulation control instantaneous-heating storage heat exchanger

Also Published As

Publication number Publication date
CZ2022400A3 (en) 2024-03-27

Similar Documents

Publication Publication Date Title
US4750472A (en) Control means and process for domestic hot water re-circulating system
US4241588A (en) Energy conserving water heating system
US4537348A (en) System for efficient service water heating
US20070108307A1 (en) Temperature conditioning radiant wall system for buildings
CN105066220A (en) Solar energy and gas heating hot water furnace complementary heating system
US20070205292A1 (en) Heated fluid distribution apparatus for combined domestic hot water supply and space heating system
US5655710A (en) Method for controlling operated-units count of fluid heating units
EP1875138A2 (en) Hot water installations
CN101761108A (en) Non-negative pressure cold and hot water mixed supply system for domestic use
CN206669841U (en) Self-priming balances heating system
CN203163079U (en) Double-plate-exchanging indoor heat exchanger
US20070205293A1 (en) Heated fluid distribution apparatus for combined domestic hot water supply and space heating system in closed loop
WO2024061391A1 (en) A method of regulating the temperature of domestic hot water and circulating heating system for its implementation
CN101886834B (en) Constant-temperature constant-moisture air-conditioning system of constant energy type
US3105137A (en) Heating and/or cooling system
JP2005098628A (en) Heat source water supply system
US9835385B2 (en) Three-conductor and four-conductor system for saving energy in connection with district heat
CN100578107C (en) Directly-heated system
WO2016042312A1 (en) A domestic water and space heating system
EP3312519B1 (en) Heating and hot-water supply device applied to district and central heating and control method therefor
Gudmundsson et al. Building solutions for low temperature heat supply
GB2225097A (en) Water heating apparatus
CN206973667U (en) A kind of heat cycles pipeline for heating system
SU1090979A1 (en) Closed water district heat supply system
JPH081344B2 (en) Multi hot water supply system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23785711

Country of ref document: EP

Kind code of ref document: A1