WO2013026588A1 - Mobile water heating device - Google Patents

Mobile water heating device Download PDF

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Publication number
WO2013026588A1
WO2013026588A1 PCT/EP2012/060346 EP2012060346W WO2013026588A1 WO 2013026588 A1 WO2013026588 A1 WO 2013026588A1 EP 2012060346 W EP2012060346 W EP 2012060346W WO 2013026588 A1 WO2013026588 A1 WO 2013026588A1
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WO
WIPO (PCT)
Prior art keywords
fluid
heating device
fluid circuit
water
water heating
Prior art date
Application number
PCT/EP2012/060346
Other languages
French (fr)
Inventor
Almar Markussen
Original Assignee
Heathwork As
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 Heathwork As filed Critical Heathwork As
Publication of WO2013026588A1 publication Critical patent/WO2013026588A1/en

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Classifications

    • 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
    • F24H1/06—Portable or mobile, e.g. collapsible
    • 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
    • F24D15/00—Other domestic- or space-heating 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
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
    • 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
    • F24H1/08—Packaged or self-contained boilers, i.e. water heaters with control devices and pump in a single unit

Definitions

  • the present invention relates to a mobile water heating device.
  • Background From NO 323389 a mobile device is known for thawing frozen ground. This device has a closed fluid circuit in which glycol or another suitable liquid is pumped round from a fluid container via a heating device (diesel/paraffin/gas-driven boiler) and out through hoses laid out on the ground.
  • a heating device diesel/paraffin/gas-driven boiler
  • District heating systems or local heating systems may on occasions have a need for the supply of hot water, for example when the energy source is put out of operation due to failure or maintenance, or during the construction of such systems.
  • Examples of such district heating or local heating systems may include buildings with water- borne floor heating or water-borne air heating.
  • Buildings under construction also have a need for heating, for the comfort of personnel at the building site, for controlled drying of concrete, etc.
  • the object of the present invention is to provide a mobile water heating device which contains all the necessary equipment provided in one unit and which is easy to transport to the operational site concerned.
  • the object of the invention is also to provide a mobile water heating device which is independent of external infrastructure, i.e. the only thing that needs to be done is to supply water to the machine and supply it with fuel.
  • the present invention relates to a mobile water heating device, comprising:
  • the first and second fluid circuits are provided inside the housing
  • the first fluid circuit comprises a first fluid conduit coupled between the heat exchanger, a fluid heating device, a first pump device, a first fluid container, and further to the heat exchanger;
  • the second fluid circuit comprises a second fluid conduit coupled between a circulating water inlet connector, a second pump device, the heat exchanger, and further to a water outlet connector;
  • the second fluid circuit comprises an air venting valve provided in a highest part of the second fluid circuit
  • the second fluid circuit comprises a drain valve in the lowest part of the second fluid circuit
  • the water outlet connector is provided lower than the air venting valve. It should be noted that the sequence of the fluid heating device, the first pump device and the first fluid container in the first fluid circuit may be varied. It should also be noted that the second pump device in the second fluid circuit may be placed on both sides of the heat exchanger.
  • the circulating water inlet connector comprises the drain valve. These are therefore provided as one valve with the functions of both.
  • the second fluid circuit comprises a second fluid container.
  • the second fluid container is mounted between the circulating water inlet connector and the second pump device.
  • the second fluid container may therefore be located at other places in the second fluid circuit.
  • the second fluid container is an expansion tank.
  • the drain valve is mounted in a lowest part of the second fluid container.
  • the water in the second fluid circuit has a pressure higher than the pressure outside the mobile water heating device.
  • the second fluid container comprises an overpressure valve configured so as to release fluid from the second fluid container if the pressure in the second fluid container exceeds an overpressure limit value.
  • the second fluid container comprises a underpressure valve configured to admit air into the second fluid container if the pressure in the second fluid container becomes lower than a underpressure limit value.
  • the fluid in the first fluid circuit has a pressure higher than the pressure outside the mobile water heating device.
  • a third fluid conduit is coupled between the second fluid container and a consumption water inlet connector.
  • the third fluid conduit comprises a magnetic valve.
  • the second fluid container includes a water level meter, where the magnetic valve is configured to be opened or closed respectively depending on the water level measured by the water level meter.
  • Fig. 1 illustrates a first embodiment of the support frame and the housing viewed from the side;
  • Fig. 2 illustrates a first embodiment of the fluid circuits
  • Fig. 3 illustrates a second embodiment of the fluid circuits
  • Fig. 4 illustrates a third embodiment of the fluid circuits
  • Fig. 5 illustrates a second embodiment of the support frame and the housing in perspective.
  • the water heating device 1 comprises a support frame 2 and a housing 3 provided on the support frame 2.
  • the different parts of the water heating device 1 which will be described in detail below are attached to the support frame 2 and/or to the housing 3, thereby making it easy to transport the water heating device 1.
  • the housing 3 is a protective cover made of glass fibre or the like, where the primary purpose is to protect the various parts of the water heating device 1 against precipitation, dust, dirt, vandalism, tampering or against blows, impact etc.
  • a number of hatches 4a, 4b, 4c are provided in the housing 3 . On opening the hatch 4a access is obtained to the coupling interfaces and user interfaces in the water heating device 1.
  • the hatches 4b, 4c are intended to make service, maintenance etc. easier.
  • the mobile water heating device 1 is provided as a trailer with wheels 5 and a trailer coupling for attachment to a vehicle.
  • the mobile water heating device 1 comprises a first fluid circuit 10 on the so-called primary side of the device and a second fluid circuit 20 on the so-called secondary side of the device.
  • the primary side and the secondary side are shown separated by a dotted line.
  • the first and second fluid circuits 10, 20 are provided inside the housing 2.
  • first fluid In the first fluid circuit 10 a first fluid can flow, while in the second fluid circuit 20 a second fluid, such as water, can flow.
  • a heat exchanger 50 is connected between the first fluid circuit 10 and the second fluid circuit 20 for heat exchange between the first fluid and the water.
  • the heat exchanger 50 is considered to be known to a person skilled in the art and will not be described in detail here.
  • the first fluid circuit 10 in fig. 2 is basically considered to be known from the previously mentioned publication NO 323389.
  • the first fluid circuit 10 comprises a first fluid conduit 1 1 connected between the heat exchanger 50, a fluid heating device 12, a first pump device 13, a first fluid container 14, and further to the heat exchanger 50.
  • the first fluid is typically glycol or other suitable liquids.
  • the fluid heating device 12 arranges for heating of the first fluid.
  • the fluid heating device 12 is a boiler driven by a fuel in fluid form, such as diesel, paraffin, petrol, gas or other suitable fluids.
  • a fuel in fluid form such as diesel, paraffin, petrol, gas or other suitable fluids.
  • the device 1 is highly flexible with regard to where it can be used. It is of course also possible for the fluid heating device 12 to be a boiler operated by electric power, but this requires the device 1 to be employed in the vicinity of a source of electricity.
  • the first pump device 13 is considered to be known to a person skilled in the art.
  • the first fluid container 14 is typically an expansion tank and is also considered to be known to a person skilled in the art. These will therefore not be described in detail here.
  • the first fluid container 14 comprises an overpressure valve 15 for releasing air from the fluid container 15 and comprises a underpressure valve 16 for admitting air into the fluid container as the volume of the first fluid is changed due to the temperature changes in the first fluid.
  • heated fluid is circulated from the fluid heating device 12 to the expansion tank 14 and on to the heat exchanger 50, where the first fluid transfers heat to the water in the second fluid circuit 20.
  • the first fluid in the first fluid circuit 10 may have a pressure higher than the pressure outside the mobile water heating device. The result is that the temperature of the first fluid can be increased without gas bubbles or the like forming in the first fluid circuit, which could reduce the output of the heat exchanger 50 and the first pump device 13.
  • the overpressure valve 15 will be configured so as to release fluid from the first fluid container 14 if the pressure in the first fluid container 14 exceeds an overpressure limit value greater than zero, for example 1-6 bar.
  • the underpressure valve 16 will be configured so as to admit air into the first fluid container 14 if the pressure in the first fluid container 14 becomes lower than a underpressure limit value, for example 0-3 bar.
  • a underpressure limit value for example 0-3 bar.
  • the underpressure limit value will be set to 0 bar to avoid vacuum in the first fluid container 14, and hence in the first fluid circuit 10.
  • overpressure valve 15 and the underpressure valve 16 may be two different valves or they may alternatively be provided as one valve having both functions.
  • the second fluid circuit 20 comprises a second fluid conduit 21 connected between a circulating water inlet connector 31 , a second pump device 23, the heat exchanger 50, and further to a water outlet connector 32.
  • the circulating water inlet connector 31 will be coupled to a first end of a water conduit, for example a first end of a district or local heating plant
  • the water outlet connector 32 will be coupled to a second end of a water conduit, for example the district or local heating plant.
  • the actual coupling interface is considered here to be known to a person skilled in the art.
  • the second fluid circuit In order to drain out air while filling the second fluid circuit 20 with water, the second fluid circuit includes an air venting valve 27 provided in a highest part 20b of the second fluid circuit 20. This is provided in such a manner that even if the device 1 is somewhat inclined, for example if the trailer is standing on a downhill slope or uphill slope, the air venting valve 27 will still represent the highest part 20b of the second fluid circuit 20.
  • the second fluid circuit 20 includes a drain valve 28 in the lowest part 20a of the second fluid circuit 20.
  • the drain valve 18 is closed while the air venting valve 27 is open.
  • the second fluid circuit is filled with water via the circulating water inlet connector 31 and/or water outlet connector 32 until water comes out of the air venting valve 27 - this being an indication that the second fluid circuit 20 is filled.
  • the air venting valve 27 is then closed.
  • the circulating water inlet connector 31 is disconnected and the water outlet connector 32 and the drain valve 18 and the air venting valve 27 are opened. The water then runs out of the drain valve 18, the circulating water inlet connector 31 and the water outlet connector 32. To achieve this, the water outlet connector 32 is provided lower than the air venting valve 27.
  • the circulating water inlet connector 31 comprises the drain valve 28, i.e. the circulating water inlet connector 31 is both a connector for connection to a local or district heating plant as well as acting as drain valve 28. This means that in this embodiment the circulating water inlet connector 31 is provided in the lowest part 20a of the second fluid circuit 20.
  • the local or district heating plant to which the device 1 is connected in fig. 2 may include an expansion tank for permitting the fluid in the second fluid circuit 20 to expand due to temperature changes.
  • the second fluid circuit 20 may further include a valve 31 a at the circulating water inlet connector 31 and a valve 32a at the water outlet connector 32 to enable water to be kept in the second fluid circuit 20 when disconnecting from the local or district heating system.
  • a filter F may be provided in the second fluid circuit 20 in order to filter off impurities in the incoming water from the circulating water inlet connector 31.
  • the water in the second fluid circuit 20 may have a pressure higher than the pressure outside the mobile water heating device. This pressure increase may be achieved by means of the volume expansion of the water due to the heating in the heat exchanger and by means of the second pump device 23.
  • the device 1 may be enabled to supply water at a temperature of 100°C out of the water outlet connector 32.
  • first fluid circuit 10 comprises an inlet 17 provided between the first fluid container 14 and the heat exchanger 50.
  • the first fluid circuit 10 further comprises an outlet 18 provided between the heat exchanger 50 and the fluid heating device 12.
  • a valve 19 is also provided in the first fluid circuit 10.
  • the inlet 17 and the outlet 18 are coupled to respective coupling interfaces. In this way the device 1 according to the invention may also be employed for heating and circulation of the first fluid, as the device disclosed in NO 323389 does.
  • the second fluid circuit 20 in fig. 2 comprises, in addition to what is illustrated and described in fig. 2, a second fluid container 24.
  • the second fluid container 24 is mounted between the circulating water inlet connector 31 and the second pump device 23.
  • the second fluid container 24 may be an expansion tank permitting expansion of the water in the second fluid circuit due to heating of the water.
  • the drain valve 28 is mounted in a lowest part of the second fluid container 24.
  • the drain valve 28 is also provided in the lowest part 20a of the second fluid circuit 20, but the circulating water inlet connector 31 , however, is not necessarily provided in the lowest part 20a of the second fluid circuit 20.
  • the drain valve 28 and the circulating water inlet connector 31 may, however, be on the same level, i.e. both are provided in the lowest part 20a. In both these cases the second fluid circuit 20 will be able to be emptied by opening the drain valve 28, the circulating water inlet connector 31 , the water outlet connector 32 and the air venting valve 27.
  • the second fluid container 24 comprises an overpressure valve 25 and a
  • underpressure valve 26 for releasing or admitting air respectively depending on the volume of the water in the second fluid container 24.
  • the water in the second fluid circuit 20 may have a pressure higher than the pressure outside the mobile water heating device.
  • the overpressure valve 25 is configured so as to release fluid from the second fluid container 24 if the pressure in the second fluid container 24 exceeds an overpressure limit value.
  • overpressure limit value may be 1-3 bar, but may also be up to 25 bar.
  • the overpressure limit value may be set by requirements determined by the local or district heating plant to which the water is supplied to.
  • the underpressure valve 26 is configured so as to admit air into the second fluid container 24 if the pressure in the second fluid container 24 becomes lower than a underpressure limit value, for example 0-3 bar.
  • a underpressure limit value for example 0-3 bar.
  • the underpressure limit value will be set to 0 bar to avoid vacuum in the second fluid container 24, and hence in the second fluid circuit 20.
  • a device which can supply heated water to, and circulate water through, a local or district heating plant.
  • fig. 4 A number of elements in fig. 4 are identical to those already described with reference to fig. 2 and fig. 3, and these will therefore not be described in detail here.
  • the first fluid circuit 10 corresponds to that illustrated and described in connection with fig. 2.
  • the first fluid circuit 10 in fig. 4 may well be like the first fluid circuit in fig. 3.
  • a third fluid conduit 41 is connected between the second fluid container 24 and a consumption water inlet connector 33.
  • the consumption water inlet connector 33 may be connected to a water conduit, typically a hose or a pipe.
  • the third fluid conduit 41 comprises a magnetic valve 42.
  • the second fluid container 24 comprises a water level meter.
  • the magnetic valve 42 is configured so as to be opened or closed respectively depending on the water level measured by the water level meter.
  • the device 1 can supply hot water out through the water outlet connector 32 while being supplied with water from a water source, for example a river, a lake, a water tank or the like, for example for supplying water to provisional shower installations during military exercises or operations, major sports arrangements or the like.
  • a water source for example a river, a lake, a water tank or the like
  • the valve 31a will be closed and the circulating water inlet connector 31 will not be in use.
  • a filter F2 may also be provided in the third fluid conduit 41.
  • the filter F2 may be a sand and mud filter, but may also be a more advanced filter, for example a UV filter or the like.
  • the device 1 can be employed for purifying water, both by means of the UV filter and by the heating of the water to a temperature of 80-100°C, thereby enabling the water to be used as drinking water.
  • a mobile water heating device 1 is shown in the form of a container.
  • the support frame 2 of the device is composed of the floor and/or walls in the container, while the housing 3 of the device is composed of the roof and/or walls of the container.
  • a container is illustrated which can easily be lifted on and off lorries, trains or other vehicles and which can also be lifted by means of a helicopter.

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  • 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)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)

Abstract

The present invention relates to a mobile water heating device (1), comprising a support frame (2), a housing (3) provided on the support frame (2), a first fluid circuit (10) wherein a first fluid can flow and a second fluid circuit (20) wherein water can flow. A heat exchanger (50) is connected between the first fluid circuit (10) and the second fluid circuit (20) for heat exchange between the first fluid and the water. The first fluid circuit (10) comprises a first fluid conduit (11) coupled between the heat exchanger (50), a fluid heating device (12), a first pump device (13), a first fluid container (14), and further to the heat exchanger (50). The second fluid circuit (20) comprises a second fluid conduit (21) coupled between a circulating water inlet connector (31), a second pump device (23), the heat exchanger (50) and further to a water outlet connector (32). The second fluid circuit (20) comprises an air venting valve (27) provided in a highest part (20b) of the second fluid circuit (20). The second fluid circuit (20) comprises a drain valve (28) in the lowest part (20a) of the second fluid circuit (20). The water outlet connector (32) is provided lower than the air venting valve (27).

Description

Mobile water heating device
The field of the invention
The present invention relates to a mobile water heating device. Background From NO 323389 a mobile device is known for thawing frozen ground. This device has a closed fluid circuit in which glycol or another suitable liquid is pumped round from a fluid container via a heating device (diesel/paraffin/gas-driven boiler) and out through hoses laid out on the ground.
District heating systems or local heating systems may on occasions have a need for the supply of hot water, for example when the energy source is put out of operation due to failure or maintenance, or during the construction of such systems. Examples of such district heating or local heating systems may include buildings with water- borne floor heating or water-borne air heating.
Buildings under construction also have a need for heating, for the comfort of personnel at the building site, for controlled drying of concrete, etc.
There may be a need for the supply of hot water for consumption in other circumstances, for example for provisional shower installations during military exercises or operations, major sports arrangements or the like. There is also a need to be able to boil water for purifying the water so that it can be used as drinking water.
In such situations it is common practice to transport out large water containers, heating arrangements and water conduits which take up a lot of space and which must be interconnected on site. This is cumbersome, takes a great deal of time and is expensive. Furthermore, a major problem with this kind of equipment is that it is subject to frost damage. If water containers and conduits are not continuously heated, they will be damaged due to the effects of frost. One way of solving this is to empty water from the water container and conduits, this often being accomplished by blowing air through the water conduits in order to remove the water therein. The object of the present invention is to provide a mobile water heating device which contains all the necessary equipment provided in one unit and which is easy to transport to the operational site concerned. It is also an object that the device should be easy to connect to various types of equipment which have to be supplied with hot water and it should be easy to disconnect the device from this equipment and avoid frost damage to the device in a simple manner. The object of the invention is also to provide a mobile water heating device which is independent of external infrastructure, i.e. the only thing that needs to be done is to supply water to the machine and supply it with fuel.
Summary of the invention The present invention relates to a mobile water heating device, comprising:
- a support frame;
- a housing provided on the support frame;
- a first fluid circuit wherein a first fluid can flow;
- a second fluid circuit wherein water can flow;
- a heat exchanger coupled between the first fluid circuit and the second fluid circuit for heat exchange between the first fluid and the water;
where:
- the first and second fluid circuits are provided inside the housing;
- the first fluid circuit comprises a first fluid conduit coupled between the heat exchanger, a fluid heating device, a first pump device, a first fluid container, and further to the heat exchanger;
- the second fluid circuit comprises a second fluid conduit coupled between a circulating water inlet connector, a second pump device, the heat exchanger, and further to a water outlet connector;
- the second fluid circuit comprises an air venting valve provided in a highest part of the second fluid circuit;
- the second fluid circuit comprises a drain valve in the lowest part of the second fluid circuit;
- the water outlet connector is provided lower than the air venting valve. It should be noted that the sequence of the fluid heating device, the first pump device and the first fluid container in the first fluid circuit may be varied. It should also be noted that the second pump device in the second fluid circuit may be placed on both sides of the heat exchanger.
In an aspect of the invention the circulating water inlet connector comprises the drain valve. These are therefore provided as one valve with the functions of both.
In an aspect of the invention the second fluid circuit comprises a second fluid container.
In an aspect of the invention the second fluid container is mounted between the circulating water inlet connector and the second pump device. The second fluid container may therefore be located at other places in the second fluid circuit.
In an aspect of the invention the second fluid container is an expansion tank. In an aspect of the invention the drain valve is mounted in a lowest part of the second fluid container.
In an aspect of the invention the water in the second fluid circuit has a pressure higher than the pressure outside the mobile water heating device. In an aspect of the invention the second fluid container comprises an overpressure valve configured so as to release fluid from the second fluid container if the pressure in the second fluid container exceeds an overpressure limit value.
In an aspect of the invention the second fluid container comprises a underpressure valve configured to admit air into the second fluid container if the pressure in the second fluid container becomes lower than a underpressure limit value.
In an aspect of the invention the fluid in the first fluid circuit has a pressure higher than the pressure outside the mobile water heating device.
In an aspect of the invention a third fluid conduit is coupled between the second fluid container and a consumption water inlet connector. In an aspect of the invention the third fluid conduit comprises a magnetic valve.
In an aspect of the invention the second fluid container includes a water level meter, where the magnetic valve is configured to be opened or closed respectively depending on the water level measured by the water level meter.
Detailed description Embodiments of the present invention will now be described with reference to the attached drawings, in which:
Fig. 1 illustrates a first embodiment of the support frame and the housing viewed from the side;
Fig. 2 illustrates a first embodiment of the fluid circuits; Fig. 3 illustrates a second embodiment of the fluid circuits; Fig. 4 illustrates a third embodiment of the fluid circuits;
Fig. 5 illustrates a second embodiment of the support frame and the housing in perspective.
We now refer to fig. 1. Here a mobile water heating device 1 is illustrated. The water heating device 1 comprises a support frame 2 and a housing 3 provided on the support frame 2. The different parts of the water heating device 1 which will be described in detail below are attached to the support frame 2 and/or to the housing 3, thereby making it easy to transport the water heating device 1. In this embodiment the housing 3 is a protective cover made of glass fibre or the like, where the primary purpose is to protect the various parts of the water heating device 1 against precipitation, dust, dirt, vandalism, tampering or against blows, impact etc. In the housing 3 a number of hatches 4a, 4b, 4c are provided. On opening the hatch 4a access is obtained to the coupling interfaces and user interfaces in the water heating device 1. The hatches 4b, 4c are intended to make service, maintenance etc. easier.
As can be seen in fig. 1 the mobile water heating device 1 is provided as a trailer with wheels 5 and a trailer coupling for attachment to a vehicle.
We now refer to fig. 2. The mobile water heating device 1 comprises a first fluid circuit 10 on the so-called primary side of the device and a second fluid circuit 20 on the so-called secondary side of the device. The primary side and the secondary side are shown separated by a dotted line. The first and second fluid circuits 10, 20 are provided inside the housing 2.
In the first fluid circuit 10 a first fluid can flow, while in the second fluid circuit 20 a second fluid, such as water, can flow.
A heat exchanger 50 is connected between the first fluid circuit 10 and the second fluid circuit 20 for heat exchange between the first fluid and the water. The heat exchanger 50 is considered to be known to a person skilled in the art and will not be described in detail here.
The first fluid circuit 10 in fig. 2 is basically considered to be known from the previously mentioned publication NO 323389. The first fluid circuit 10 comprises a first fluid conduit 1 1 connected between the heat exchanger 50, a fluid heating device 12, a first pump device 13, a first fluid container 14, and further to the heat exchanger 50.
The first fluid is typically glycol or other suitable liquids.
The fluid heating device 12 arranges for heating of the first fluid. The fluid heating device 12 is a boiler driven by a fuel in fluid form, such as diesel, paraffin, petrol, gas or other suitable fluids. The result is that the device 1 is highly flexible with regard to where it can be used. It is of course also possible for the fluid heating device 12 to be a boiler operated by electric power, but this requires the device 1 to be employed in the vicinity of a source of electricity.
The first pump device 13 is considered to be known to a person skilled in the art. The first fluid container 14 is typically an expansion tank and is also considered to be known to a person skilled in the art. These will therefore not be described in detail here. The first fluid container 14 comprises an overpressure valve 15 for releasing air from the fluid container 15 and comprises a underpressure valve 16 for admitting air into the fluid container as the volume of the first fluid is changed due to the temperature changes in the first fluid. By means of the first pump device 13 heated fluid is circulated from the fluid heating device 12 to the expansion tank 14 and on to the heat exchanger 50, where the first fluid transfers heat to the water in the second fluid circuit 20.
In an alternative embodiment of fig. 2 the first fluid in the first fluid circuit 10 may have a pressure higher than the pressure outside the mobile water heating device. The result is that the temperature of the first fluid can be increased without gas bubbles or the like forming in the first fluid circuit, which could reduce the output of the heat exchanger 50 and the first pump device 13.
In such an embodiment the overpressure valve 15 will be configured so as to release fluid from the first fluid container 14 if the pressure in the first fluid container 14 exceeds an overpressure limit value greater than zero, for example 1-6 bar.
In the same way the underpressure valve 16 will be configured so as to admit air into the first fluid container 14 if the pressure in the first fluid container 14 becomes lower than a underpressure limit value, for example 0-3 bar. Typically the underpressure limit value will be set to 0 bar to avoid vacuum in the first fluid container 14, and hence in the first fluid circuit 10.
It should be noted that the overpressure valve 15 and the underpressure valve 16 may be two different valves or they may alternatively be provided as one valve having both functions.
The second fluid circuit 20 comprises a second fluid conduit 21 connected between a circulating water inlet connector 31 , a second pump device 23, the heat exchanger 50, and further to a water outlet connector 32. When the device according to the invention is to be used to heat up water, the circulating water inlet connector 31 will be coupled to a first end of a water conduit, for example a first end of a district or local heating plant, and the water outlet connector 32 will be coupled to a second end of a water conduit, for example the district or local heating plant. The actual coupling interface is considered here to be known to a person skilled in the art.
In order to drain out air while filling the second fluid circuit 20 with water, the second fluid circuit includes an air venting valve 27 provided in a highest part 20b of the second fluid circuit 20. This is provided in such a manner that even if the device 1 is somewhat inclined, for example if the trailer is standing on a downhill slope or uphill slope, the air venting valve 27 will still represent the highest part 20b of the second fluid circuit 20. In order to drain out water while emptying the second fluid circuit 20, in order to avoid frost damage etc. the second fluid circuit 20 includes a drain valve 28 in the lowest part 20a of the second fluid circuit 20. In the same way as above this is also provided in such a manner that even if the device 1 is somewhat inclined, for example if the trailer is standing on a downhill slope or an uphill slope, the drain valve 18 will still represent the lowest part 20a of the second fluid circuit 20.
During filling the drain valve 18 is closed while the air venting valve 27 is open. The second fluid circuit is filled with water via the circulating water inlet connector 31 and/or water outlet connector 32 until water comes out of the air venting valve 27 - this being an indication that the second fluid circuit 20 is filled. The air venting valve 27 is then closed.
During emptying the circulating water inlet connector 31 is disconnected and the water outlet connector 32 and the drain valve 18 and the air venting valve 27 are opened. The water then runs out of the drain valve 18, the circulating water inlet connector 31 and the water outlet connector 32. To achieve this, the water outlet connector 32 is provided lower than the air venting valve 27.
In fig. 2 the circulating water inlet connector 31 comprises the drain valve 28, i.e. the circulating water inlet connector 31 is both a connector for connection to a local or district heating plant as well as acting as drain valve 28. This means that in this embodiment the circulating water inlet connector 31 is provided in the lowest part 20a of the second fluid circuit 20.
It should be noted that the local or district heating plant to which the device 1 is connected in fig. 2 may include an expansion tank for permitting the fluid in the second fluid circuit 20 to expand due to temperature changes.
The second fluid circuit 20 may further include a valve 31 a at the circulating water inlet connector 31 and a valve 32a at the water outlet connector 32 to enable water to be kept in the second fluid circuit 20 when disconnecting from the local or district heating system.
Furthermore, a filter F may be provided in the second fluid circuit 20 in order to filter off impurities in the incoming water from the circulating water inlet connector 31.
It should be noted that the water in the second fluid circuit 20 may have a pressure higher than the pressure outside the mobile water heating device. This pressure increase may be achieved by means of the volume expansion of the water due to the heating in the heat exchanger and by means of the second pump device 23.
Increasing the pressure in the second fluid circuit 20 avoids the formation of gas bubbles in the water, which could reduce the output of the heat exchanger 50 and the second pump device 23. In this way the device 1 may be enabled to supply water at a temperature of 100°C out of the water outlet connector 32.
We now refer to fig. 3. A number of elements in fig. 3 are identical to those already described with reference to fig 2, and these will therefore not be described in detail here.
Here the first fluid circuit 10 comprises an inlet 17 provided between the first fluid container 14 and the heat exchanger 50. The first fluid circuit 10 further comprises an outlet 18 provided between the heat exchanger 50 and the fluid heating device 12. A valve 19 is also provided in the first fluid circuit 10. The inlet 17 and the outlet 18 are coupled to respective coupling interfaces. In this way the device 1 according to the invention may also be employed for heating and circulation of the first fluid, as the device disclosed in NO 323389 does.
The second fluid circuit 20 in fig. 2 comprises, in addition to what is illustrated and described in fig. 2, a second fluid container 24. The second fluid container 24 is mounted between the circulating water inlet connector 31 and the second pump device 23. The second fluid container 24 may be an expansion tank permitting expansion of the water in the second fluid circuit due to heating of the water.
In this embodiment the drain valve 28 is mounted in a lowest part of the second fluid container 24. Here the drain valve 28 is also provided in the lowest part 20a of the second fluid circuit 20, but the circulating water inlet connector 31 , however, is not necessarily provided in the lowest part 20a of the second fluid circuit 20. The drain valve 28 and the circulating water inlet connector 31 may, however, be on the same level, i.e. both are provided in the lowest part 20a. In both these cases the second fluid circuit 20 will be able to be emptied by opening the drain valve 28, the circulating water inlet connector 31 , the water outlet connector 32 and the air venting valve 27.
The second fluid container 24 comprises an overpressure valve 25 and a
underpressure valve 26 for releasing or admitting air respectively depending on the volume of the water in the second fluid container 24. The water in the second fluid circuit 20 may have a pressure higher than the pressure outside the mobile water heating device. Here the overpressure valve 25 is configured so as to release fluid from the second fluid container 24 if the pressure in the second fluid container 24 exceeds an overpressure limit value. The
overpressure limit value may be 1-3 bar, but may also be up to 25 bar. The overpressure limit value may be set by requirements determined by the local or district heating plant to which the water is supplied to. In the same way the underpressure valve 26 is configured so as to admit air into the second fluid container 24 if the pressure in the second fluid container 24 becomes lower than a underpressure limit value, for example 0-3 bar. Typically the underpressure limit value will be set to 0 bar to avoid vacuum in the second fluid container 24, and hence in the second fluid circuit 20.
In accordance with this, a device is achieved which can supply heated water to, and circulate water through, a local or district heating plant.
We now refer to fig. 4. A number of elements in fig. 4 are identical to those already described with reference to fig. 2 and fig. 3, and these will therefore not be described in detail here. In fig. 4 the first fluid circuit 10 corresponds to that illustrated and described in connection with fig. 2. However, the first fluid circuit 10 in fig. 4 may well be like the first fluid circuit in fig. 3.
In fig. 4 a third fluid conduit 41 is connected between the second fluid container 24 and a consumption water inlet connector 33. The consumption water inlet connector 33 may be connected to a water conduit, typically a hose or a pipe. The third fluid conduit 41 comprises a magnetic valve 42. The second fluid container 24 comprises a water level meter. The magnetic valve 42 is configured so as to be opened or closed respectively depending on the water level measured by the water level meter.
In this way the device 1 can supply hot water out through the water outlet connector 32 while being supplied with water from a water source, for example a river, a lake, a water tank or the like, for example for supplying water to provisional shower installations during military exercises or operations, major sports arrangements or the like. In this embodiment the valve 31a will be closed and the circulating water inlet connector 31 will not be in use. In this embodiment a filter F2 may also be provided in the third fluid conduit 41.
The filter F2 may be a sand and mud filter, but may also be a more advanced filter, for example a UV filter or the like. In this way the device 1 can be employed for purifying water, both by means of the UV filter and by the heating of the water to a temperature of 80-100°C, thereby enabling the water to be used as drinking water. We now refer to fig. 5. Here a mobile water heating device 1 is shown in the form of a container. The support frame 2 of the device is composed of the floor and/or walls in the container, while the housing 3 of the device is composed of the roof and/or walls of the container. In fig. 5 a container is illustrated which can easily be lifted on and off lorries, trains or other vehicles and which can also be lifted by means of a helicopter.
It should be emphasized that the above description is only intended as an example, and variations of the invention will be possible within the scope of the patent claims. For example, it is possible to change the sequence of the pump devices, the heat exchanger and the fluid containers in the fluid circuits as the claims are not limited to the sequence shown in the figures.

Claims

A mobile water heating device (1), comprising:
- a support frame (2);
- a housing (3) provided on the support frame (2);
- a first fluid circuit (10) wherein a first fluid can flow;
- a second fluid circuit (20) wherein water can flow;
- a heat exchanger (50) connected between the first fluid circuit (10) and the second fluid circuit (20) for heat exchange between the first fluid and the water;
where:
- the first and second fluid circuits (10,20) are provided inside the housing (3);
- the first fluid circuit (10) comprises a first fluid conduit (1 1) connected between the heat exchanger (50), a fluid heating device (12), a first pump device (13), a first fluid container (14), and further to the heat exchanger (50);
- the second fluid circuit (20) comprises a second fluid conduit (21) connected between a circulating water inlet connector (31), a second pump device (23), the heat exchanger (50) and further to a water outlet connector (32);
- the second fluid circuit (20) comprises an air venting valve (27) provided in a highest part (20b) of the second fluid circuit (20);
- the second fluid circuit (20) comprises a drain valve (28) in the lowest part (20a) of the second fluid circuit (20);
- the water outlet connector (32) is provided lower than the air venting valve (27).
A mobile water heating device according to claim 1 , where the circulating water inlet connector (31) comprises the drain valve (28).
A mobile water heating device according to claim 1 , where the second fluid circuit (20) comprises a second fluid container (24).
A mobile water heating device according to claim 3, where the second fluid container (24) is placed between the circulating water inlet connector (31) and the second pump device (23).
A mobile water heating device according to claim 3 or 4, where the second fluid container (24) is an expansion tank.
A mobile water heating device according to one of the claims 3-5, where the drain valve (28) is mounted in a lowest part of the second fluid container (24). A mobile water heating device according to one of the above claims, where the water in the second fluid circuit (20) has a pressure higher than the pressure outside the mobile water heating device.
A mobile water heating device according to one of the claims 3-7, where the second fluid container (24) comprises an overpressure valve (25) configured so as to release fluid from the second fluid container (24) if the pressure in the second fluid container (24) exceeds an overpressure limit value.
A mobile water heating device according to one of the claims 3-8, where the second fluid container (24) comprises a underpressure valve (26) configured so as to admit air into the second fluid container (24) if the pressure in the second fluid container (24) becomes lower than a underpressure limit value.
A mobile water heating device according to one of the above claims, where the fluid in the first fluid circuit (10) has a pressure higher than the pressure outside the mobile water heating device.
A mobile water heating device according to one of the claims 3-10, where a third fluid conduit (41) is coupled between the second fluid container (24) and a consumption water inlet connector (33).
A mobile water heating device according to claim 1 1 , where the third fluid conduit (41) comprises a magnetic valve (42).
A mobile water heating device according to claim 12, where the second fluid container (24) includes a water level meter, and where the magnetic valve (42) is configured so as to be opened or closed respectively depending on the water level measured by the water level meter.
PCT/EP2012/060346 2011-08-19 2012-06-01 Mobile water heating device WO2013026588A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20111141A NO333494B1 (en) 2011-08-19 2011-08-19 Mobile water heater
NO20111141 2011-08-19

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NO343761B1 (en) * 2018-03-13 2019-06-03 Romy Clima As Mobile heating plant
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EP3086054A1 (en) * 2015-04-22 2016-10-26 mobiheat GmbH Assembly of mobile tempering device and vehicle trailer with variable level
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DE102020000972B4 (en) 2019-05-17 2021-11-04 MobiHeat GmbH Mobile unit consisting of temperature control device and trailer vehicle with adjustable level

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