• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The heat exchanger 1 has a housing 3 provided with a stall air inlet opening 5 and a stall air outlet opening 7 for exhausting stall air to the outside environment 6. A stall air duct 8 extends between the stall air inlet opening and the stall air outlet opening. A number of air ducts 11 extend through the stable air duct, through which the outside air flows into the livestock shed. Ventilation means 13 and 15 ensure the intake of fresh outside air and the sucking of stall air from the cowshed to the environment 6. In the stall air channel 8 there are spraying means 17 and misting means 19. The spraying means 17 serve to cool the air ducts 11 in the summer to control the temperature in the livestock shed and further to clean the outside air ducts from contamination by the stall air flowing past. The atomizing means 19 are for cleaning the stable air flowing through the stable air duct to the environment 6.
    公开号:NL2019965A
    申请号:NL2019965
    申请日:2017-11-23
    公开日:2018-11-02
    发明作者:Victor Wagenberg Antonius
    申请人:Van De Ven Beheer B V；
    IPC主号:
    专利说明:

    DESCRIPTION:
    FIELD OF THE INVENTION
    The invention relates to a heat exchanger for use in a cattle shed, comprising:
    a housing provided with:
    a stall air inlet opening for admitting stall air, a stall air outlet opening for venting outside of the cowshed environment, a stall air channel extending in the housing between the stall air inlet opening and the stall air outlet opening, and a number of openings in one or more walls of the housing, a plurality of air vents extending into the stall air duct and having open ends connected to the openings, one of which air vents forming an outside air inlet opening and opening into the environment outside the cattle shed and the other end forming an outside air outlet opening and opening into the cattle shed, first ventilation means for sucking in or blowing outside air through the air ducts in the cattle shed, and second ventilation means for sucking in or blowing out stall air through the stall air channel to the environment outside the cattle shed.
    State of the art
    Such a heat exchanger is generally known. When such a heat exchanger is used in a livestock shed, fresh outside air flows into the livestock shed via the air ducts and is thereby heated by relatively warm stall air which flows out along the air ducts. Due to stricter environmental requirements with regard to the quality of the outside air, the outgoing air must be cleaned before it can be discharged into the environment. Known air washing devices in which liquid (water) is sprayed into the air stream are relatively expensive.
    Summary of the invention
    An object of the invention is to provide an affordable (i.e. relatively inexpensive) option for cleaning ambient air flowing in the environment. To this end, the heat exchanger according to the invention is characterized in that it further comprises spraying means for spraying and / or atomizing liquid on and between the air ducts. Liquid, preferably water, can in this case be sprayed and / or sprayed into the air flow present between the air ducts and sprayed onto the air ducts in order to clean the outflowing stall air and to be able to meet the environmental requirements. The liquid injected into the air stream catches impurities from the air and the liquid sprayed onto the air ducts catches impurities from the air flowing past it. By integrating air washing agents (spraying and / or spraying agents) into the heat exchanger, a relatively inexpensive possibility for cleaning ambient air flowing into the environment is obtained.
    A disadvantage of such heat exchangers is that the air ducts on the outside become polluted as a result of the polluted stable air, as a result of which the heat transfer decreases. Therefore, the spraying means of the heat exchanger according to the invention preferably have first spraying means with a relatively high spraying capacity that are present in the housing above the air ducts, for spraying liquid onto and against the air ducts for cleaning and / or cooling the air ducts. air ducts. In addition to the air-cleaning effect of the sprayed liquid, these first spraying means therefore also have a cleaning function for the air ducts and a cooling effect for the outside air flowing in through the air ducts. The outside air is hereby cooled indirectly by evaporation of water present on the air ducts, whereby heat is extracted from the outside air flowing in through the air ducts, causing it to cool. The extracted outside air can therefore be cooled by indirect adiabatic cooling (so without releasing moisture into the air). Because of this cooling, there is less ventilation during the warm periods and the maximum ventilation requirement of the animals decreases.
    An embodiment of the heat exchanger according to the invention is characterized in that the spraying means further comprise second spraying means with a smaller capacity than the first spraying means, which second spraying means are present in the housing, for spraying and / or atomizing liquid in the stall air duct for the benefit of of cleaning the stall air going to the environment outside the cattle shed and / or cooling the air ducts. Liquid sprayed into small drops has a better cleaning effect on the contaminated stable air than relatively large drops sprayed into the air stream by spraying means. The degree and position of atomization also determines the degree of humidity of the air ducts and the pollution present on the air ducts. By making the air ducts more moist, the covering / sticking effect will increase, so that dust is better caught on the air ducts and thus the cleaning effect of the stall air will increase. The spraying means preferably have both said first and second spraying means, wherein the first spraying means are activated for cleaning the air ducts and / or cooling the incoming air in the stable air and wherein the second spraying means are activated for purifying the outgoing flowing air stable air.
    The first spraying means preferably have a first liquid pump and the second spraying means preferably have a second liquid pump for supplying liquid. If only the air-cleaning effect is required, only the second liquid pump needs to work so that energy can be saved. The second liquid pump for cleaning and / or cooling preferably has a smaller pump capacity than the first liquid pump which, in addition to cleaning the air, also cleans the air ducts on the outside, in order to realize even greater energy savings.
    The first spraying means preferably have a number of spraying heads, as well as control means for activating one or more of the spraying heads, and the second spraying means preferably have a number of spraying heads, as well as further control means for activating one or more of the spraying heads. nebuliser heads.
    A further embodiment of the heat exchanger according to the invention is characterized in that the first spraying means comprise a number of separate spraying circuits, each of which can be controlled separately. As a result, different parts of the air ducts can be successively cleaned or cooled. Because not all spraying means have to work simultaneously, the liquid pipes can be made thinner and a less powerful liquid pump can suffice.
    The spraying circuits are preferably spaced apart, viewed in the longitudinal direction of the air ducts, so that optionally relatively warm outside air is cooled immediately upon entry into the heat exchanger or less warm outside air at the end of the heat exchanger flowing in the cattle shed and thus the cooling effect can be influenced.
    Each spray circuit preferably has a liquid line to which a number of spray heads are connected, which liquid line is connected to the first liquid pump via a valve. By controlling the valves, the spray heads do not have to be individually adjustable.
    A still further embodiment of the heat exchanger according to the invention is characterized in that the heat exchanger comprises a collecting tray which is present under the air ducts for collecting spray liquid and / or atomizing liquid, which collecting tray is provided with a bottom sloping towards the stall air inlet opening. . The slope of the bottom is preferably sufficiently steep and smooth to prevent contaminants in the collected spray liquid from being able to deposit on the bottom. On the stable air inlet side of the heat exchanger there is preferably a liquid reservoir to which the descending end part of the receptacle is connected. By placing the fluid reservoir on the stall air inlet side instead of on the outside air inlet side, it is prevented that the fluid can freeze in the winter with all the detrimental consequences.
    The invention also relates to a method for breeding cattle in a cattle shed, wherein use is made of a heat exchanger according to the invention. With regard to the method, the invention is characterized in that during a first phase of the breeding process the heat exchanger is operated exclusively as a heat exchanger in which no liquid is sprayed because in this phase warm fresh air is desired in young animals and the stall air is relatively little contaminated by the young animals and during a subsequent second phase of the breeding process the heat exchanger is also operated as an air washer whereby liquid is atomized in the stall air duct because in this phase the stall air is relatively heavily polluted by the larger animals.
    The ventilation means and spraying means are preferably controlled by a computer system on the basis of the current and desired temperature in the cowshed and on the basis of current and desired purity of the outgoing stall air to the environment outside the cowshed.
    An embodiment of the method according to the invention is characterized in that all air going in and out of the cowshed is sucked / blown through the heat exchanger. In known cowsheds, the heat exchangers are only used for a part of the installed ventilation capacity. By adding cleaning and cooling it becomes interesting to have all ventilation air by means of bring the described units into the stable and remove them from the stable. By ventilating the entire shed with the heat exchanger according to the invention, the temperature difference in the shed will decrease considerably during the year. This means that animals are housed in a much more constant climate and are thereby positively influenced by their performance. The table below shows this on the basis of measurements.
    Known heat exchanger Heat recovery device according to the invention Tbuiten RV outside Tinate Inside RV inside Ventilation(wall) Tl Inside • R-V inside Ventilation(m3 / hour) -10 97.5% -10 16.7 81% 1.2 13.1 21.8 35% 2.6 -5 92.5% -5 18.9 80% 1.2 13.6 21.9 38% 2.8 0 80% 0 21.0 77% 1.2 14.2 22.1 41% 3.0 5 75% 5 21.2 68% 1.6 14.8 22.2 44% 3.3 10 70% 10 21.6 63% 2.3 15.7 22.4 49% 3.7 15 67.5% 15 22.2 61% 3.6 17.0 22.8 56% 4.3 20 67.5% 20 23.7 63% 6.4 18.9 23.5 66% 5.4 25 52.5% 25 26.7 51% 12.0 19.3 23.7 67% 5.7 30 42.5% 30 31.1 42% 12.6 19.9 24.0 70% 6.2 35 32.5% 35 35.7 33% 12.6 20.5 24.5 70% 6.3
    Brief description of the drawings
    The invention will be explained in more detail below with reference to an exemplary embodiment of the heat exchanger according to the invention shown in the drawings. Hereby shows:
    Figure 1 shows an embodiment of the heat exchanger in longitudinal section; and
    Figure 2 shows the heat exchanger in top view with the top open.
    Detailed description of the drawings
    Figures 1 and 2 show an embodiment of the heat exchanger according to the invention in longitudinal section and in top view with the top open. The heat exchanger 1 has a housing 3 which is provided with a stall air inlet opening 5 for admitting stall air and a stall air outlet opening 7 for exhausting stall air to the environment 6 outside the cattle shed. A stall air duct 8 extends into the housing between the stall air inlet opening and the stall air outlet opening.
    The housing is furthermore provided with a number of openings in two opposite walls of the housing. The openings 10 in connection with the environment 6 in one of these walls form inlet openings for the admission of outside air and openings in the other wall which are in connection with the inner space of the cattle shed form outlet opening for exhausting the outside air in the cattle shed. There are a number of air ducts 11 open at the ends in the housing and extending into the air duct. These tubes are connected with the open ends to the openings 9 and 10 and form air ducts through which the fresh outside air flows into the cattle shed.
    Depending on the energy exchange and / or degree of cleaning of the used stall air, the tube length of the unit described above is variable. In this way an optimum tube length can be determined for every climate condition and type of livestock in which energy exchange, air washing, energy consumption (longer tubes will create more pressure drop and therefore absorb energy) are the parameters that influence this tube length. An additional function of the tubes is to catch the water droplets that are sprayed into the air by spraying / misting. As a result, no drip traps are needed to prevent the water droplets from ending up in the exhaust fans of the heat exchanger.
    The heat exchanger furthermore has first ventilation means 13 for sucking in fresh outside air via the air ducts in the cattle shed and second ventilation means 15 for sucking stable air through the stable air duct from the stable to the environment 6. Further, in the stable air duct 8 are located in the housing 3 spraying means 17 and spraying means 19 for spraying or spraying liquid on the tubes and in the stable air duct. The spraying means 17 are in the housing 3 above the air ducts 11 and serve to cool the air ducts 11 in the summer to regulate the temperature in the cattle shed and furthermore to clean the ducts on the outside from contamination by the stall air flowing past it. The atomizing means 19 are for cleaning the stable air flowing through the stable air duct to the environment 6.
    The spraying means 17 have a liquid pump 21 for supplying spray liquid, a number of spray heads 23 connected thereto. The atomizing means 19 have a further liquid pump 27 for supplying atomizing liquid and a number of atomizing heads 29. This further liquid pump 27 has a smaller pump capacity than the liquid pump 21. Control means for actuating one or more of the spray heads. For controlling the valves and
    The ventilation means and spraying means and misting means are controlled by a computer system 41 which is provided with control means which cools the incoming outside air on the basis of the current and desired temperature in the cattle shed by suitable control of the liquid pump. The computer system 41 is further provided with further control means which controls the further liquid pump 27 on the basis of current and desired purity of the outgoing stall air to the environment outside the cattle shed.
    The spraying means 17 have a number of separate spraying circuits 20 which, viewed in the longitudinal direction of the air ducts, are spaced apart one behind the other and can be controlled separately. Each spray circuit 20 has a liquid line 31 to which a number of the spray heads 23 are connected and is connected via a valve 33 to a main line 32 to which the liquid pump 21 is connected. The control means not only control the liquid pump 21 but also the valves 33 in order to be able to better control the temperature of the incoming outside air and to be able to effectively clean the zones that are controlled by an excessive flush.
    Below the air ducts 11 there is a collecting tray 35, see figure 2, for collecting sprayed dust and sprayed dust. The receiving bin is provided with a bottom 37 which runs down to the air inlet opening 5 and which connects to a liquid reservoir 39 for temporarily storing collected spray liquid. This liquid reservoir is also present on the air inlet side of the heat exchanger.
    Air washers in poultry farming are very expensive due to the high ventilation capacity per animal and, apart from the cleaning effect, do not provide any climate or energy benefit in the livestock shed. The particulate matter emissions and effects on public health are forcing the sector to develop affordable developments for far-reaching emissions reduction. An important payback component of the heat exchanger according to the invention is the improvement of the result in the cattle shed. Water is sprayed into the outgoing stall air in the heat exchanger. This water provides the cooling because it cools down to the wet bulb temperature of the outgoing air. Simultaneously, odor, particulate matter and ammonia dissolve in this water. These substances are filtered out of the water in an external water treatment plant (known technology).
    This air washing technology is activated in the second half of the round (in broilers), or in the first weeks (in young chicks, high temperature, low ventilation and low emissions) the heat exchanger simply works as a heat exchanger, only after 2 to 3 weeks also the air wash function. The decision whether or not to turn on the air wash function is made by computer system based on energy balance across the house and measured indoor climate parameters. Air washing (particulate matter, ammonia, odor, etc.) can be controlled based on the air quality of the exhausted air from the stable. The air wash function can also be used in the first period as a cleaning function for the air ducts.
    The first atomizing means are preferably installed near the stall air inlet opening of the heat exchanger, so that adiabatic cooling takes place immediately upon entry. Preferably, depending on the effectiveness of the cooling, various atomizing means are placed above the tubes which are placed at different distances X 1 and X 2 (see Figure 1) from the first atomizing means. The maximum efficiency is achieved in order to optimally choose the number of nebulizers and distances X and is dependent on, among other things, air speeds and applied temperatures.
    The liquid can optionally be acidified to better capture ammonia or another form of liquid treatment can take place to influence which substances do or do not dissolve in the liquid. Furthermore, the liquid that is sprayed during cleaning / cooling can be reused, whereby the liquid is used up and therefore does not have to be discharged.
    Although in the foregoing the invention has been elucidated with reference to the drawings, it must be stated that the invention is by no means limited to the embodiment shown in the drawings. The invention also extends to all embodiments deviating from the embodiment shown in the drawings within the scope defined by the claims.
    权利要求:
    Claims (15)
    [1]
    CONCLUSIONS:
    A heat exchanger (1) for use in a cattle shed, comprising:
    a housing (3) provided with:
    a stall air inlet opening (5) for admitting stall air, a stall air outlet opening (7) for exhausting stall air to the environment (6) outside the cowshed, a stall air duct (8) extending in the housing between the stall air inlet opening and the stall air outlet opening, and a number of openings (9, 10) in one or more walls of the housing, a number of air ducts (11) which extend into the stall air duct and are provided with open ends connected to the openings, of which air ducts one end of an outside air inlet opening forms and debouches into the environment outside the livestock shed and the other end forms an outdoor air outlet opening and debouches into the livestock shed, first ventilation means (13) for sucking in or blowing outside air through the air ducts in the livestock shed, and second ventilation means (15) for the sucking in or blowing stable air through the stable air channel to the environment outside the livestock stable, characterized in that the heat exchanger (1) also comprises spraying means (17, 19) for spraying and / or spraying liquid on and between the air ducts (11).
    [2]
    A heat exchanger according to claim 1, characterized in that the spraying means (17, 19) comprise first spraying means (17) which are present in the housing (3) above the air ducts (11), for spraying liquid on and against the air ducts for cleaning and / or cooling the air ducts.
    [3]
    A heat exchanger according to claim 2, characterized in that the first spraying means (17) comprise a first liquid pump (21) for supplying liquid.
    [4]
    A heat exchanger according to claim 2 or 3, characterized in that the first spraying means (17) comprise a number of spraying heads (23), as well as control means for activating one or more of the spraying heads.
    [5]
    A heat exchanger according to any one of the preceding claims, characterized in that the spraying means (17) comprise second spraying means (19) with a lower capacity than the first spraying means present in the housing (3) for spraying and / or spraying. of fluid in the stall air duct (8) for the purpose of cleaning the stall air going to the environment (6) outside the cattle shed and / or cooling the air ducts.
    [6]
    A heat exchanger according to claim 5, characterized in that the second spraying means (T9) comprise a second liquid pump (27) for supplying liquid
    [7]
    A heat exchanger according to claim 5 or 6, characterized in that the second spraying means (19) comprise a number of atomizing heads (29) and further control means for activating one or more of the atomizing heads.
    [8]
    A heat exchanger according to claims 3 and 6, characterized in that the second liquid pump (27) for atomizing liquid has a lower pump capacity than the first liquid pump (21) for spraying the air ducts clean.
    [9]
    A heat exchanger according to any one of the preceding claims, characterized in that the first spraying means (17) comprise a number of separate spraying circuits (20), each of which can be controlled separately.
    [10]
    A heat exchanger according to claim 9, characterized in that, viewed in the longitudinal direction of the air ducts, the spraying circuits (20) are spaced apart one behind the other.
    [11]
    A heat exchanger according to claim 9 or 10 and 3, characterized in that each spraying circuit (20) comprises a liquid line (31) to which a number of spray heads (23) are connected, which liquid line is connected to the first via a valve (33) fluid pump.
    [12]
    A heat exchanger according to any one of the preceding claims, characterized in that the heat exchanger comprises a collecting tray (35) which is present under the air ducts (11) for collecting liquid, which collecting tray is provided with a downward opening to the stall air inlet opening (5) bottom (37).
    [13]
    A heat exchanger according to claim 12, characterized in that the heat exchanger comprises a liquid reservoir (39) for storing collected liquid, which liquid reservoir is present on the stable air inlet side of the heat exchanger, wherein the collecting tray (35) with its descending end on the fluid reservoir is connected.
    [14]
    A method for breeding cattle in a cattle shed, wherein use is made of a heat exchanger according to any one of the preceding claims, characterized in that during a first phase of the breeding process the heat exchanger is operated exclusively as a heat exchanger in which no liquid is sprayed because in this phase warm fresh air is desired with young animals and the stall air is relatively little polluted by the young animals and during a subsequent second phase of the breeding process the heat exchanger is also operated as an air washer whereby liquid is atomized in the stall air duct because in this phase the stable air is polluted relatively strongly by the animals that have become bigger.
    [15]
    Method according to claim 14, characterized in that all air entering and leaving the livestock house is sucked / blown through the heat exchanger.
    O
    1/2 σ cn
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL2018784|2017-04-26|EP18168636.1A| EP3395166A3|2017-04-26|2018-04-20|Air treatment unit, as well as a method for breeding animals in a cattle shed|
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