EP4193106A1 - A system for indoor microclimate control and a method for control thereof - Google Patents
A system for indoor microclimate control and a method for control thereofInfo
- Publication number
- EP4193106A1 EP4193106A1 EP21758805.2A EP21758805A EP4193106A1 EP 4193106 A1 EP4193106 A1 EP 4193106A1 EP 21758805 A EP21758805 A EP 21758805A EP 4193106 A1 EP4193106 A1 EP 4193106A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sewage
- heat exchanger
- exchanger circuit
- cooling
- incoming
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000010865 sewage Substances 0.000 claims abstract description 133
- 238000001816 cooling Methods 0.000 claims abstract description 118
- 239000002351 wastewater Substances 0.000 claims abstract description 100
- 238000010438 heat treatment Methods 0.000 claims abstract description 84
- 238000003860 storage Methods 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims description 21
- 238000013459 approach Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000009825 accumulation Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 238000011084 recovery Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/0206—Heat exchangers immersed in a large body of liquid
- F28D1/0213—Heat exchangers immersed in a large body of liquid for heating or cooling a liquid in a tank
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0472—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being helically or spirally coiled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C2001/005—Installations allowing recovery of heat from waste water for warming up fresh water
-
- 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
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/20—Sewage water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/006—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground receiving heat-exchange fluid from the drinking or sanitary water supply circuit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/30—Relating to industrial water supply, e.g. used for cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
Definitions
- the invention relates to indoor microclimate control systems for providing heating, hot water supply and free cooling using sewage or wastewater potential, and to methods of controlling such indoor microclimate control systems.
- the object of the invention is achieved by creating an indoor microclimate control system comprising a wastewater accumulation tank in synergy with heating and free cooling systems. More precise heat and colling control is provided.
- the system comprises a sewage or wastewater solids separation tank for the separation of thick a sewage or wastewater fractions connected to a wastewater accumulation tank.
- the system comprises a wastewater inlet connected to the sewage or the wastewater particulate separation tank in such a way that the incoming wastewater through the wastewater particulate separation tank can enter the wastewater storage tank.
- a heating heat exchanger circuit and a free-cooling heat exchanger circuit are placed in the wastewater storage tank. The free-cooling heat exchanger circuit is located below the heating heat exchanger circuit.
- the system includes an inlet wastewater control valve connected to the wastewater inlet and configured for inlet wastewater control.
- the first heat exchanger circuit flow valve is connected to the heating exchanger circuit, configured to change the heating surface area of the heating exchanger circuit.
- a second heat exchanger circuit flow valve may be connected to the heat exchanger circuit, configured to additionally change the heating surface area of the heat exchanger circuit.
- the system further includes a free-cooling heat exchanger circuit flow valve connected to the free-cooling heat exchanger circuit and configured to change the cooling surface area of the free-cooling heat exchanger circuit.
- the system also contains several sensors.
- An inlet effluent thermometer located in the effluent inlet or effluent particulate separation tank and configured to determine the incoming effluent temperature.
- a heat exchanger circuit thermometer located near the heating exchanger circuit and configured to determine the temperature in the area of the heating exchanger circuit.
- Free-cooling heat exchanger circuit thermometer located near the free-cooling heat exchanger circuit and configured to determine the temperature in the free-cooling heat exchanger circuit area.
- An inflow meter connected to the inflow and configured to record the inflow volume.
- Heat exchanger circuit heat meter connected to the heating heat exchanger circuit and configured for instantaneous heat demand accounting.
- Free-cooling heat exchanger circuit heat meter connected to the free-cooling heat exchanger circuit and configured for cooling instantaneous demand accounting.
- the system comprises a control unit connected to the above-mentioned thermometers for receiving temperature reading data from the respective system units and to the incoming wastewater meter for receiving incoming wastewater volume reading data and to the above-mentioned meters for receiving instantaneous heat demand data.
- the control unit is also connected to valves for their control based on the data received from said thermometers and meters.
- the indoor microclimate control system further comprises a sewage pump well located between the sewage supply and the sewage inlet for the sewage supply to the sewage inlet.
- the indoor microclimate control system further comprises a thick fraction pressure line having a pump configured to discharge the separated thick fraction to the wastewater collection system at an end located in the wastewater particulate separation tank.
- the system further comprises a pressure cooling tank connected to the wastewater accumulation tank and a wastewater solids separation tank for receiving the thick fraction separated therein, thus ensuring a decrease in the wastewater pressure.
- a pressure cooling tank connected to the wastewater accumulation tank and a wastewater solids separation tank for receiving the thick fraction separated therein, thus ensuring a decrease in the wastewater pressure.
- the method for control includes the following steps: a) receiving the instantaneous cooling demand value (QFREE) in Joules (J) at the control unit from the free-cooling heat exchanger circuit heat meter and/or receiving the instantaneous heat demand value (QHEAT) in Joules (J) at the control unit from the heating heat exchanger circuit; b) opening the incoming sewage control valve if the instantaneous cooling demand value (QFREE) is less than the instantaneous heat demand value (QHEAT) and closing the incoming sewage control valve if the instantaneous cooling demand value (QFREE) is equal to or greater than the instantaneous heat demand value (QHEAT); c) setting the upper temperature threshold (TH 16) and the lowest temperature threshold (TL16) for the temperature values incoming from the free-cooling heat exchanger circuit thermometer, wherein the upper temperature threshold (TH 16) being the highest temperature value in summer above which the system must not raise the sewage temperature in the sewage storage tank, and wherein the lowest temperature
- the lowest and highest wastewater temperatures must be set in the control unit before returning to the city wastewater networks (hereinafter - discharge temperature), this temperature will be indicated by the free-cooling heat exchanger circuit thermometer. These temperatures serve as a criterion for determining the condition of the system and determine the operating temperature corridor of the installation, i.e. the lowest discharge temperature in winter below which the system must not cool the effluent and the highest discharge temperature in summer above which the system must not raise the effluent temperature before discharge. In temperate climates, the optimal temperature distribution corridor is 7 °C - 18 °C to meet the heating needs in winter and the indoor cooling needs in summer. When operating in heating mode, the heat recovery potential will be limited at this temperature, the lower the set temperature, the higher the heat recovery potential and vice versa.
- the upper temperature threshold (TH 16) is the highest temperature in summer above which the system must not raise the effluent temperature in the effluent storage tank
- the lower temperature threshold (TL16) is the lowest temperature in winter below which the system must not reduce the effluent temperature in the effluent storage tank.
- the highest temperature threshold (TH 16) should then be set to 18 °C (29 IK) and the lowest temperature threshold (TL16) to be set to 7°C (280K).
- the control unit Upon receipt of the data, the control unit calculates the total heat balance, knowing the instantaneous heat demand from the heat exchanger circuit heat meter and the free-cooling heat exchanger circuit heat meter. Before reporting the opening of the sewage inlet valve to the control unit, the instantaneous state of the system must be determined by determining the heat potential generated by the free cooling mode detected by the heat meter in the free cooling heat exchanger circuit.
- the data from the measuring devices to the control unit is preferably updated once a minute, each time data is received from the devices. However, the data recovery time can be shortened or extended if necessary.
- the control unit records the state of the system, thus determining the direction of heat flow, for example, a situation where wastewater in the tank approaches the discharge temperature, but after recording the system state, the heat flow from free cooling exceeds does not yet command the sewage inlet valve to open, as heat is expected to increase in the tank and no urban sewage heat potential is required.
- QFREE is the instantaneous heat demand value (QFREE) [J]
- T16 - temperature value [K] accounted by the free-cooling heat exchanger circuit thermometer T14 - temperature value [K] accounted by the incoming sewage thermometer, wherein in the heating mode, if the temperature value (T16) approaches the lowest temperature threshold (TL16), the control unit determines the QHEAT value according to equation (40) and if the determined QHEAT value is not equal to QFREE value, the control unit sends a signal to the incoming sewage control valve to open it, and the incoming sewage control valve is closed after recalculated QHEAT value is equal to QFREE value.
- the same setting of the heating mode may be accomplished by control of amount on the incoming sewage.
- the control unit calculates according to equation (40) and if the QHEAT value is not equal to QFREE, a command is sent to the control unit to open the sewage inlet valve from a network with a higher heat potential until the conditions of equation (40) are met.
- the control unit reads it from the flow and temperature graph values of the heat exchanger circuit, successively sending a command to close the wastewater inlet valve because the system is in balance.
- QFREE QHEAT + ((T16 - T14) * c * M) [J], (50) where QHEAT is instantaneous heat demand value (QHEAT) [J],
- the same setting of the cooling mode may be accomplished by control of amount on the incoming sewage.
- Setting of the cooling mode involves determining the amount of the incoming sewage to be supplied to the sewage storage tank according to the following equation:
- M (QFREE - QHEAT)/(T16 - T14) * c [kg/s], (51) wherein in the cooling mode, if the temperature value (T16) approaches the highest temperature threshold (TH 16) and the instantaneous cooling demand value (QFREE) is bigger than the instantaneous heat demand value (QHEAT), the control unit calculates the amount of the incoming sewage (M) according to equation (51) to compensate an amount of already supplied heat energy and the control unit and opens the incoming sewage control valve and closes the incoming sewage control valve after the calculated amount of the incoming sewage (M) is supplied into the sewage storage tank and a temperature (T16) pre-set in the control unit is reached. .
- the control unit determines the QFREE value according to equation (50) to open the incoming sewage control valve and to close it after fulfilling the conditions of equation (50).
- the upper temperature of the wastewater is set in the system control unit before the wastewater is discharged from the tank, respectively, if the free cooling mode heats the wastewater to the upper temperature.
- the control unit analyzes the data from the circuit thermometers.
- the control unit reads the value on the free cooling heat exchanger circuit thermometer, if it approaches the upper temperature limit, then the control unit is sent to open the sewage valve and supply heat potential until the conditions of equation (50) are met.
- the control unit reads it from the flow and temperature graph values of the free cooling heat exchanger circuit, successively sending a command to close the sewage valve because the system is in balance.
- the object of the invention can be used in the energy supply of a building, wherein it is possible to provide heating, hot water and indoor cooling of the building in the so-called free cooling mode.
- the device is especially efficient for installation in the city's centralized sewage networks, because here the volume and temperature of sewage is constant throughout the year.
- the volume of wastewater is higher in the winter months, but the temperature decreases (8- 10°C), in the summer months the volume of wastewater decreases slightly, but its temperature increases (14-16°C).
- the unit is designed to use urban wastewater only to the extent necessary to ensure the installed heating and cooling parameters. This means that in cases where the heat demand of the building coincides with the demand for indoor cooling, wastewater from the city network is not used at all.
- the control unit regulates the flow control valves based on the instantaneous heat demand and the heat potential in the wastewater storage tank.
- the heat potential in the tank is measured depending on the sewage supply and temperature.
- Sewer heat exchanger circuits are separated by flow valves to reduce hydraulic resistance.
- the first heating heat exchanger circuit is located at the top of the tank and is always open, subsequent circuits are opened as required to increase the capacity of the wastewater heat exchanger depending on the heat pump demand. Identical to the free cooling circuit.
- the circuits are arranged according to the direction of the heat gradient in the tank, the lowest temperature in the lower part, the highest temperature in the upper part. Tanks shall be calculated with a margin to ensure a more even heat exchange as well as to reduce the impact of potential network failure risks on system operation.
- the system control unit takes into account the wastewater outlet temperature, preventing it from falling below the set temperature.
- the system is set to the potential for changes in the wastewater temperature, the difference of which is measured at the inlet of the wastewater solids separation tank and at the outlet to the city networks. This difference can be changed depending on the wastewater temperature and the required wastewater heat potential with the seasons. The lower the difference, the more often the amount of wastewater in the tank needs to be changed. This allows the system to balance and reduce the effects of winter and summer peak loads.
- the control unit controls the flow valve of the free cooling heat exchanger identically. If the set temperature difference is not ensured, the flow valve of the free-cooling heat exchanger circuit is opened, thus increasing the flow and heat dissipation area in the sewage tank.
- the opening / closing of the free-flow heat exchanger circuit flow valve is set when the flow values change, these values can be changed in the system.
- Fig. 1 is the basic scheme of the indoor microclimate control system.
- FIG. 2 is a schematic diagram of an indoor microclimate control system, supplemented by an illustration of the control unit (20) and related elements.
- Fig. 3 is a graph showing the potential of wastewater networks in kWh at the amount of wastewater available at a particular stage depending on the set wastewater cooling limit (t° - IK).
- Fig. 4 is an overall scheme of one embodiment of the indoor microclimate control system.
- FIGs. 1 and 2 illustrates one embodiment of the invention.
- An indoor microclimate control system comprising a wastewater storage tank (1), a wastewater solids separation tank (2) for separating thick wastewater fractions connected to said wastewater storage tank (1).
- the wastewater particulate separation tank (2) is connected to the wastewater inlet (3) in such a way that the incoming wastewater through the wastewater particulate separation tank (2) can enter the wastewater storage tank (1).
- the wastewater inlet (3) includes an inlet wastewater inlet valve (10) configured to control the inlet wastewater.
- an inlet wastewater thermometer (14) configured to determine the inlet wastewater temperature (see Fig. 1).
- Fig. 2 shows an embodiment of the invention when the wastewater thermometer (14) is placed in the wastewater solids separation tank (2).
- a heating heat exchanger circuit (7) with a heating inlet (4) and a free-cooling heat exchanger circuit (9) with a free-cooling inlet (5) are placed in the wastewater storage tank (1).
- the free-cooling heat exchanger circuit (9) is located below the heating heat exchanger circuit (7) closer to the base of the tank (1).
- the heating heat exchanger circuit (7) is connected to a first heating heat exchanger circuit flow valve (11) configured to change the heating surface area of the heating heat exchanger circuit (7).
- the heating heat exchanger circuit (7) is connected to a second heating heat exchanger circuit flow valve (12), which is configured to additionally change the heating surface area of the heating heat exchanger circuit (7).
- the free-cooling heat exchanger circuit (9) is a free-cooling heat exchanger circuit flow valve (13) configured to change the cooling surface area of the free-cooling heat exchanger circuit (9).
- the system contains sensor elements for obtaining the data required for system control.
- the system comprises a heating heat exchanger circuit thermometer (15) located in the vicinity of the heating heat exchanger circuit (7) and configured to determine the temperature in the zone of the heating heat exchanger circuit (7) and a free cooling heat exchanger circuit thermometer (16) located in the free cooling heat exchanger circuit (9). nearby and configured to determine the temperature in the zone of the free cooling heat exchanger circuit (9).
- the system further comprises an incoming wastewater meter (17) connected to the wastewater inlet (3) and configured to account for the volume of incoming wastewater.
- the system also comprises a heat exchanger circuit heat meter (18) connected to the heating heat exchanger circuit (7) and configured for instantaneous heat demand accounting, and a free cooling heat exchanger circuit heat meter (19) connected to the free cooling heat exchanger circuit (9) and configured for cooling, for the accounting of current demand.
- the system includes a control unit (20) configured to control the system.
- the control unit (20) is connected to thermometers (13, 14, 15) for receiving temperature reading data and to an incoming wastewater meter (17) for receiving incoming wastewater volume reading data, and to meters (18; 19) for receiving instantaneous heat demand data, and with valves (5; 10; 11; 12; 13) for controlling them based on data received from thermometers (13, 14, 15) and meters (17; 18; 19). See Figs. 1 and 2.
- the indoor microclimate control system further includes a thick fraction pressure line (32) having a pump (35) configured to discharge the separated thick fraction to the wastewater collection system (33) at an end located in the wastewater particulate separation tank (2).
- the system further comprises a pressure cooling tank (34) connected to the wastewater accumulation tank (1) and a wastewater solids separation tank (2) for receiving the thick fraction separated therein, thus ensuring a reduction of the wastewater pressure.
- Figs. 1 and 2. illustrates the potential of the wastewater network in kWh, where the system is set to 1.5°C (274.5K) difference between the inlet and outlet wastewater temperature. As shown in the example, the heating demand is partially covered by the heat generated by free cooling in the tank. In the specific section of the wastewater supply network, 530 m3/day are available per day, in such a scenario, only 44 m3 of wastewater per day is required to ensure the operation of the system.
- Fig. 4 illustrates an overall system of indoor microclimate control.
- the system comprises a wastewater storage tank (1) as described in embodiments of Figs. 1 and 2.
- the wastewater storage tank is connected to a city sewage network (60).
- the wastewater storage tank (1) is also connected to a building sanitary equipment (61) via the heating heat exchanger circuit (7).
- the building sanitary equipment (61) is further connected to a hot water system of a building (63).
- the wastewater storage tank (1) is also connected to a heat exchanger (65) and to a heat pump (65) via the heating heat exchanger circuit (7).
- the wastewater storage tank (1) is further connected to a building climate control system (62) via the free-cooling heat exchanger circuit (9).
- the building climate control system (62) further includes a flow control valve (67) in order to manage a flow from the building climate control system (62) to the free-cooling heat exchanger circuit (9) and the heat exchanger (66).
- the system further comprises multiple pumps (69) for providing a water flow or other liquid media flow within the system is necessary direction of the flow (72).
- the Fig. 4 also discloses temperature ranges which system provides and controls during its operation.
- the system further comprises an accumulation tank (64) connected to the hot water system of a building (63) and to the heat pump (65).
- the accumulation tank (64) is necessary for keeping constant temperatures within the hot water system of a building (63) and within the heat pump (65) - the temperatures are disclosed in Fig. 4.
- the accumulation tank (64) itself is connect to an inflow from a heating unit (70), to an outflow to a heating unit (71) and to an inflow from a water pipe (68).
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Selective Calling Equipment (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LVP-20-53A LV15618B (en) | 2020-08-05 | 2020-08-05 | A system for indoor microclimate control and a method for control thereof |
PCT/LV2021/050004 WO2022031154A1 (en) | 2020-08-05 | 2021-07-14 | A system for indoor microclimate control and a method for control thereof |
Publications (1)
Publication Number | Publication Date |
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EP4193106A1 true EP4193106A1 (en) | 2023-06-14 |
Family
ID=80118398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21758805.2A Pending EP4193106A1 (en) | 2020-08-05 | 2021-07-14 | A system for indoor microclimate control and a method for control thereof |
Country Status (3)
Country | Link |
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EP (1) | EP4193106A1 (en) |
LV (1) | LV15618B (en) |
WO (1) | WO2022031154A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2438622A1 (en) * | 1974-08-12 | 1976-02-26 | Rolf Stoever | Domestic space heating system - utilises residual heat in domestic hot water run to waste in drains |
DE2742161A1 (en) * | 1977-09-19 | 1979-03-29 | Bero En Beratung Und Organisat | METHOD AND DEVICE FOR THE PRELIMINARY CLARIFICATION AND STORAGE OF DIRTY WASTE WATER FOR THE PURPOSE OF HEAT RECOVERY |
EP2148143B1 (en) * | 2008-07-21 | 2016-01-27 | César González Valiente | Electrical appliance producing hot water |
FR2946133B1 (en) * | 2009-05-26 | 2011-07-15 | Alain Moure | DEVICE FOR RECOVERING HEAT FROM WASTE WATER, THERMAL SYSTEM COMPRISING SUCH A DEVICE AND METHOD. |
DE102010006882A1 (en) * | 2010-01-29 | 2011-08-04 | Selent, Stefan, 12557 | Excess heat accumulator for storing excess heat resulting during operation of e.g. block-type thermal power station, has cavity filled with liquid storage medium, where excess heat is introduced into cavity by heat exchanger |
WO2015007292A1 (en) * | 2013-07-14 | 2015-01-22 | Klausen Mikael | A system for cooling of buildings and for heating using recycled heat energy from a sedimentation tank |
WO2015007293A1 (en) | 2013-07-19 | 2015-01-22 | University Of Copenhagen | Stem-loop silver nanocluster probes for mirna detection |
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2020
- 2020-08-05 LV LVP-20-53A patent/LV15618B/en unknown
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2021
- 2021-07-14 EP EP21758805.2A patent/EP4193106A1/en active Pending
- 2021-07-14 WO PCT/LV2021/050004 patent/WO2022031154A1/en active Application Filing
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LV15618B (en) | 2022-12-20 |
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