EP4144938A1 - System und verfahren zur wärmerückgewinnung - Google Patents

System und verfahren zur wärmerückgewinnung Download PDF

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Publication number
EP4144938A1
EP4144938A1 EP20828994.2A EP20828994A EP4144938A1 EP 4144938 A1 EP4144938 A1 EP 4144938A1 EP 20828994 A EP20828994 A EP 20828994A EP 4144938 A1 EP4144938 A1 EP 4144938A1
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EP
European Patent Office
Prior art keywords
fluid
cylinder
source
heat exchanger
higher pressure
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
Application number
EP20828994.2A
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English (en)
French (fr)
Inventor
Santiago LAGO GUTIERREZ
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP4144938A1 publication Critical patent/EP4144938A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/12—Devices or arrangements for circulating water, i.e. devices for removal of polluted water, cleaning baths or for water treatment
    • E04H4/129—Systems for heating the water content of swimming pools

Definitions

  • the present invention relates to a system and a method for heat recovery, with minimum energy consumption, in the storage of liquids which require continuous renewal, as in the case of pools.
  • Water renewal is an operation that is usually performed manually. This means that an operator opens the drain valve of the pool and in about 10 minutes drains the described amount. It is then filled with water from the water system until reaching the desired level in the pool again. In order to obtain heat recovery in that time, an exchanger capable of handling flow volumes of 126 m 3 /h, with an exchange power of about 2,050 KW would be needed.
  • a standard exchanger of this size is particularly expensive and is not in use most of the day. Therefore, this investment is not appealing.
  • the size of the exchanger can be readily reduced by simply increasing the exchange time, that is, reducing the fill and drain speed.
  • the present invention discloses a system for heat recovery between a fluid source having a lower pressure and a fluid source having a higher pressure.
  • the system comprises:
  • the system of the present invention is a simple, compact, low-cost, and reduced energy-consuming system with high volumetric precision, since it can carry out its function without more external energy being provided than what is necessary for supervision functions.
  • the applicant does not know of any solution that is as effective as the one provided by the present invention.
  • the present invention also provides a method for heat recovery between a fluid source having a lower pressure and a fluid source having a higher pressure, by means of the system of the present invention.
  • the method comprises the steps of:
  • the present invention relates to the use of the system for heat recovery according to the present invention in the renewal and treatment of water in pools.
  • the present invention discloses a system for heat recovery between a fluid source having a lower pressure and a fluid source having a higher pressure.
  • the system comprises a pumping equipment (23) and a heat exchanger (11) to which the fluid source having a lower pressure and the fluid source having a higher pressure are connected.
  • the pumping equipment (23) continuously displaces the same proportion of fluid from the source having a higher pressure and fluid from the source having a lower pressure, so it is a system with volumetric precision.
  • volumetric displacement body is defined as a part moving in an alternating manner inside a cylinder body for displacing a fluid or for receiving movement from the same.
  • a piston, or a membrane are volumetric displacement bodies.
  • the pumping equipment (23) comprises a first cylinder (1) with connection ports to the source having a higher pressure and to the heat exchanger (11). It also comprises a second cylinder (2) with connection ports to the source having a lower pressure and to the heat exchanger (11).
  • Both cylinders (1, 2) have a common rod (3) to which two volumetric displacement bodies (4, 5) are fixed, generating 4 chambers (6, 6', 7, 7'): Namely, a first volumetric displacement body (4) generates in the first cylinder (1) two first chambers (6, 6'), and a second volumetric displacement body (5) generates in the second cylinder (2) two second chambers (7, 7').
  • the first chambers (6, 6') of the first cylinder (1) are connected in an alternating manner to the source having a higher pressure or to the heat exchanger (11). While one of the first chambers is connected to the source having a higher pressure, the other one is connected to the heat exchanger and vice versa.
  • the pumping equipment (23) utilizes the difference in pressure between fluids to perform pumping.
  • the working fluid coming from the source having a higher pressure for example water from a supply system (8), enters one of the first chambers (6, 6') of the first cylinder (1) and moves the first volumetric displacement body (4).
  • the movement of the first volumetric displacement body (4) causes an increase in volume of one of the first chambers at the expense of reducing the volume of the other first chamber, which is drained.
  • the movement of the first volumetric displacement body (4) is transmitted by the rod (3) to the second volumetric displacement body (5), and the pumping of the fluid coming from the source having a lower pressure towards the heat exchanger (11) occurs in the second cylinder (2).
  • the fluid having a higher pressure provides the energy necessary for pumping the fluid having a lower pressure.
  • the fluid source having a higher pressure has a lower temperature than the source having a lower pressure.
  • it is the fluid source having a lower pressure that has a lower temperature.
  • the source having a higher pressure is a supply system (8), and the source having a lower pressure is a basin (9) of a pool.
  • the source having a higher pressure can be a pumping system, and the source having a lower pressure can be a tank.
  • the first cylinder (1) has a connection port in each of its first chambers (6, 6').
  • Each connection port acts in an alternating manner as a suction port or as a discharge port, as a result of the control of a distribution valve (10). While one port acts as a suction port, the other port acts as a discharge port; and subsequently, the suction port becomes a discharge port, and the other port becomes a suction port.
  • each of its second chambers (7, 7') has a suction port and a discharge port.
  • the distribution valve (10) controls the direction of the fluid in the first cylinder (1), communicating its chambers in an alternating manner with the heat exchanger (11) or with the respective fluid source.
  • the distribution valve (10) determines at all times to which of the first chambers (6, 6') of the first cylinder (1) the fluid from the source having a higher pressure is diverted and which one is connected to the heat exchanger (11).
  • the distribution valve (10) is a four-way, two-position valve (4/2 valve).
  • connection ports in the first cylinder (1) is the same as in the second cylinder (2).
  • Both cylinders have a connection port in each of their corresponding chambers, acting in an alternating manner as a suction port or as a discharge port, as a result of the control of a distribution valve (10). While one port of a cylinder acts as a suction port, the other port of the same cylinder acts as a discharge port; and subsequently, the suction port becomes a discharge port, and the other port becomes a suction port.
  • the distribution valve (10) is a double body valve.
  • Each of the bodies of the distribution valve (10) controls the direction of the fluids in one of the cylinders, communicating its corresponding chambers in an alternating manner with the heat exchanger (11) or with the respective fluid source.
  • a body of the distribution valve (10) determines at all times to which of the first chambers (6, 6') of the first cylinder (1) the fluid from the source having a higher pressure is diverted and which one is connected to the heat exchanger (11); the other body of the distribution valve (10) determines at all times to which of the second chambers (7, 7') of the second cylinder (2) the fluid from the source having a lower pressure is diverted and which one is connected to the heat exchanger (11).
  • each of the bodies of the distribution valve (10) has a four-way and two-position design (4/2 valve).
  • the distribution valve (10) can be programmed by times or controlled by actuation means, such as by control devices for example.
  • the pumping equipment (23) comprises control devices (12) at the ends-of-travel of the rod (3) which control the distribution valve (10).
  • the control devices (12) can be arranged at the ends-of-travel of the volumetric displacement bodies (4, 5).
  • the control devices (12) act on the distribution valve (10) such that each time a control device (12) detects the corresponding end-of-travel (or shortly before that if it is more appropriate), the distribution valve (10) alternates the first chamber (6, 6') that is drained and the one that is filled from the source having a higher pressure. This involves the movement of the rod (3) and of the volumetric displacement bodies (4, 5) in the opposite direction.
  • the control devices (12) can be electric, hydraulic, or electronic.
  • the fluids discharged from the first cylinder (1) and from the second cylinder (2) are conducted to the heat exchanger (11).
  • the heat energy from the fluid having a higher temperature is utilized to increase the temperature of the other fluid.
  • the heat exchanger (11) is a parallel flow exchanger, but it can be a counter-flow exchanger without departing from the scope of the present invention as a result.
  • the fluid exiting the heat exchanger (11) coming from the source having a higher pressure and from the first cylinder (1) is diverted to the source having a lower pressure.
  • the fluid exiting the heat exchanger (11) coming from the source having a lower pressure and from the second cylinder (2) is diverted to the outlet of the system, for example to dispose of it in a drain or to send it out for external use.
  • the system of the present invention may comprise an inlet valve (24) controlling the fluid inlet into the system and an outlet valve (25) controlling the fluid outlet from the system.
  • the system operates continuously while the inlet valve (24) and outlet valve (25) are open, and stops when at least one of them is closed.
  • the regulation of the system (for example the flow volume for renewal of the water of a pool) can be performed by acting on the pressure of the fluid coming from the source having a higher pressure.
  • it may have a pressure regulator (13) or a choke valve.
  • the pumping equipment (23) continuously displaces the same proportion of fluid from the source having a higher pressure and fluid from the source having a lower pressure, so it is a system having volumetric precision.
  • the first cylinder (1) and the second cylinder (2) have the same dimensions so as to ensure that the displaced volume of fluid from the source having a higher pressure is the same as the displaced volume of fluid from the source having a lower pressure. Since the cylinders have the same dimensions and the displacement of the volumetric displacement bodies (4, 5) also, the volumes of both fluids in each cycle are identical. Accordingly, it is not necessary to monitor the regulation or setting and there is no risk of excessive draining or overflow.
  • the dimensions of the first cylinder (1) can be different from the dimensions of the second cylinder (2) if a different proportion of fluid having a higher pressure and fluid having a lower pressure is desired.
  • a different proportion of fluid having a higher pressure and fluid having a lower pressure may be desired.
  • the cylinders may have different sections.
  • the differences in volume of the volumetric displacement bodies (4, 5), for example based on their thickness, can also be used to modify the proportion.
  • the volumetric displacement bodies (4, 5) are membranes. To ensure precision in the desired proportion, it is necessary for the membranes to be non-stretchable, such as tarp membranes, for example. According to an alternative option, the volumetric displacement bodies (4, 5) are pistons.
  • the system includes non-return devices (15) to ensure the function of each connection port of the cylinders and that the flow of fluids is performed in the desired directions.
  • the system may also comprise other devices, such as one or more filters (17) to prevent fouling of the heat exchanger (11); one or more pressure gauges (16), and one or more temperature sensors (19) for controlling the correct operation and warning of the possible fouling of the heat exchanger (11); one or more hydropneumatic accumulators (14) for preventing transient excess pressures, for example in the instant that the rod (3) reaches the end-of-travel and the pumping changes direction; one or more flow detectors (18) cutting off the passage of fluid if a flow volume is not detected in some point of the system, to check for leaks, and to prevent flooding or damages in the case of burst pipes; etc.
  • the system may also comprise one or more electrically operated cut-off valves (20) receiving information from one or more flow detectors (18) and cutting off the passage of fluid if it is detected that it does not reach the desired destination.
  • a control system 26
  • the control system (26) may be a mechanical, electric, or electronic system, for example a programmable automaton. Namely, as shown in Figures 1 and 3 , the system may comprise:
  • the flow detectors (18) detect that fluid is not reaching the basin (9) of the pool, or that fluid is not exiting the heat exchanger (11) towards the outlet of the system, they send a signal to the control system (26), and the latter actuates the corresponding electrically operated cut-off valves (20), the flow of the supply system (8) and/or the outlet flow of the basin (9) of the pool being stopped.
  • the system of the present invention is optimized for low pressures (less than 10 bar).
  • the pressure of the working fluid coming from the supply system (8) is between 2 and 5 bar
  • the pressure of the water of the basin (9) of a pool is usually about 0.25 bar (atmospheric pressure plus the hydrostatic pressure corresponding to the height existing between the surface level of the pool and the pump room).
  • the present invention also provides a method for heat recovery between a fluid source having a lower pressure and a fluid source having a higher pressure, by means of the system of the present invention.
  • the method comprises the following steps:
  • the method comprises additional steps c') and e'), after steps c) and e), respectively, of diverting the fluid coming from the first cylinder (1) to the source having a lower pressure, and simultaneously diverting the fluid coming from the second cylinder (2) to the outlet of the system.
  • the changes in direction of the displacement of the rod (3) are carried out by the action of the distribution valve (10), which diverts the fluid from the source having a higher pressure in an alternating manner to either of the first chambers (6, 6') of the first cylinder (1).
  • the fluid having a higher pressure provides the mechanical energy necessary for pumping the fluid having a lower pressure
  • the fluid having a higher temperature provides the heat energy for the increase in temperature of the fluid having a lower temperature, which results in considerable energy savings, which is very useful, for example, in the case of the renewal and treatment of pool water.
  • the system of the present invention is therefore a simple, compact, low-cost, and reduced energy-consuming system with high volumetric precision, since it can carry out its function without more external energy being provided than what is necessary for supervision functions.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Sustainable Development (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP20828994.2A 2020-04-28 2020-12-11 System und verfahren zur wärmerückgewinnung Pending EP4144938A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES202030359A ES2784463B2 (es) 2020-04-28 2020-04-28 Sistema y procedimiento de recuperación de calor
PCT/ES2020/070783 WO2021219908A1 (es) 2020-04-28 2020-12-11 Sistema y procedimiento de recuperación de calor

Publications (1)

Publication Number Publication Date
EP4144938A1 true EP4144938A1 (de) 2023-03-08

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ID=72560268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20828994.2A Pending EP4144938A1 (de) 2020-04-28 2020-12-11 System und verfahren zur wärmerückgewinnung

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EP (1) EP4144938A1 (de)
ES (1) ES2784463B2 (de)
WO (1) WO2021219908A1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104676952A (zh) * 2013-11-29 2015-06-03 中煤张家口煤矿机械有限责任公司 利用生产循环水的余热制取洗浴热水的方法
CN204388413U (zh) * 2014-11-14 2015-06-10 平武臣 一种用于水池、蓄水箱远距离回收利用废水余热的系统
CN204373452U (zh) * 2014-12-24 2015-06-03 深圳市大众新源节能科技有限公司 矿井回风余热回收利用装置
CN106705430A (zh) * 2017-03-09 2017-05-24 郑州精诚热力节能服务有限公司 一种洗浴废水余热回收系统

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Publication number Publication date
ES2784463B2 (es) 2021-02-19
WO2021219908A1 (es) 2021-11-04
ES2784463A1 (es) 2020-09-25

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