Air conditioning system for a building, method for controlling this system, program and computer memory for its implementation

Abstract

The present invention relates in particular to an air conditioning system for a building (B), which comprises an enclosure (1), which includes: - a fresh air inlet (EAN), and a return air inlet (EAR), which form a first group; - an air outlet (SAB) directed towards the interior (INT) of said building (B), which forms a second group, characterized in that it further comprises: - a set of temperature sensors (C) and a humidity sensor; - between said first group and said second group, a water-fed air cooling device (3) and a reversible water / air heat exchanger (4) configured to operate in cooling or heating mode; - means configured to control either the operation of one or the other of the water-fed air cooling devices (3) and heat exchanger (4), or to deactivate them. Figure 1

Description

Title of the invention: Air conditioning system for a building, method for controlling this system, computer program and memory for its implementation. SCOPE OF THE INVENTION

[0001] The present invention relates principally to an air conditioning (i.e., heating and cooling) system for a building and to a method for controlling this system. It also relates to a computer program and memory for implementing this method. STATE OF THE ART

[0002] High energy efficiency thermodynamic heat pump technology has existed for a long time. It is efficient and well-established.

[0003] Furthermore, air cooling by water evaporation (adiabatic) is also a known and widely used principle.

[0004] The air to be treated passes through a water-saturated medium, designed to maximize the surface area and contact time between the air and the water. Upon contact, the air, which is less saturated with water than the layer of air surrounding the water film of the medium, will create an evaporation phenomenon requiring energy. The air will release this energy in the form of heat: thus, cooling occurs.

[0005] Such technology can be implemented through integration by:

[0006] - Direct: the air passing through the medium is blown directly into a building. This This configuration has the advantage of maximizing the use of the adiabatic principle (meaning that all of the generated cold is used) but, on the other hand, air loaded with humidity is injected into the building.

[0007] In addition, we must deal with technical complexities to integrate in order to guarantee the absence of air contamination (risk of legionella in particular) and the absence of water entrainment in the building.

[0008] - Indirect: the air passing through the medium is taken from the building (that is to say that it (originating from the building), cools down and passes through an intermediate heat exchanger which transfers the cooling energy to the treated air. This technology provides less cooling efficiency, but offers significant advantages, namely that it eliminates the problems mentioned above related to contamination and water entrainment.

[0009] Documents CN 108224628 and WO 2018 / 179014 describe installations as well as "indirect adiabatic" techniques.

[0010] These technologies are widely recognized and industrialized.

[0011] Air treatment / cooling / heating is one of the primary energy consumption items. It represents approximately 30% of a building's total energy consumption.

[0012] The regulations to which buildings are subject impose consumption reductions of 50% in the coming years, so all solutions for optimizing current techniques, as well as new technologies, must be studied.

[0013] The effectiveness of the adiabatic system described above is linked to the characteristics of the incoming air. Indeed, the more humid the air, the less effective and efficient the cooling capacity. It is therefore impossible to guarantee cooling throughout the entire summer period.

[0014] Moreover, depending on the purpose of the building (type of products stored there, industrial processes implemented there, refrigerated windows, etc.), an excessive increase in ambient humidity, i.e. in the building, can be detrimental.

[0015] The direct adiabatic solution, integrated alone, can be efficient, but is limited to certain applications and certain external conditions.

[0016] The invention that is the subject of French patent application no. 2202607 filed by the present applicant addresses the problems mentioned above. However, by definition, the performance of the thermodynamic function that uses an air-to-air heat exchanger is dependent on external temperature and humidity conditions.

[0017] If the adiabatic provides a solution for cooling in summer, the excellent performance of the heat pump in winter can be further improved by freeing itself from outside air conditions (cold in winter for heating and scorching in summer for air conditioning).

[0018] The present invention aims to provide a solution to this problem of reducing energy consumption through the combination of thermodynamic technology and direct adiabatic processes, a combination which makes it possible to offer the environmental benefits linked to the principle of adiabatic processes with the guarantee of maintaining ambient comfort, regardless of external weather conditions.

[0019] The objective here is to maximize the use of direct adiabatic (high efficiency) by delaying, or even completely avoiding, the switch to air conditioning mode (thermodynamic technology) by activating a compressor. PRESENTATION OF THE INVENTION

[0020] This objective is achieved according to the invention by means of a building air conditioning system, which includes an enclosure, which comprises:

[0021] - on the one hand, a fresh air inlet from outside said building, as well as a air intake from said building, which together form a first group;

[0022] - on the other hand, an air outlet towards the interior of said building, which forms a second group,

[0023] characterized by the fact that it also comprises:

[0024] - a set of temperature sensors and a humidity sensor comprising at a minimum one temperature sensor and one humidity sensor for the outside of said building and one temperature and humidity sensor for the inside of said building;

[0025] - between said first group and said second group and in the direction of traffic the air between said first fresh air inlet from outside said building and said air outlet towards the inside of said building, a water trickle air cooling device and a reversible water / air thermodynamic exchanger configured to operate in cooling or heating temperature;

[0026] - means adapted to, depending on the measurements carried out by said sensors, control either the operation of one or the other of the water-fed air cooling devices and thermodynamic exchanger, or their shutdown.

[0027] Thus, this solution of releasing calories onto water rather than onto air makes it possible to overcome the limitations of outside air conditions.

[0028] The yields in winter and summer are then stable and maximized, especially during extreme temperatures where the system needs the most power.

[0029] A system combining adiabatic and thermodynamic processes with discharge onto water therefore makes it possible to obtain unparalleled performance and, consequently, an unbeatable solution for reducing energy consumption.

[0030] According to other advantageous and non-limiting features of this installation, taken alone or according to a technically compatible combination of at least two of them:

[0031] - said two entries forming said first group are provided with registers configured to be either open or closed, and thus permit air circulation, or respectively prevent air circulation through said inlets;

[0032] - said enclosure contains an air filter which is positioned between said first inlet fresh air from outside said building and said water-fed air cooling device.

[0033] It is also achieved through a method of controlling the installation, characterized in that it comprises the following steps:

[0034] - determine a setpoint temperature Tsetpoint inside said building not to do not exceed;

[0035] - continuously or intermittently measure the temperature and humidity at the interior of the building;

[0036] - as soon as said temperature measured inside said building is equal to a temperature activation temperature Tactivation, this activation temperature being lower than the setpoint temperature Tsetpoint, control the start-up and operation of the said water-flow air cooling device;

[0037] - as soon as said temperature measured inside said building is equal to or above above said setpoint temperature Tconsigne, control the shutdown of said water-flow air cooling device, as well as the start-up and operation of said thermodynamic exchanger in air cooling mode.

[0038] According to other advantageous and non-limiting features of this process, taken alone or according to a technically compatible combination of at least two of them:

[0039] - it includes a step for measuring the humidity of the indoor air and, in assuming that this humidity exceeds a reference threshold, we limit ourselves to controlling the start-up and operation of said thermodynamic exchanger, that is to say without starting up said water-flow air cooling device;

[0040] - as soon as the temperature outside or inside the building exceeds minus a predefined threshold on a given day J1, we allocate to that day J1 the status "heatwave" and, at least on the following day J2, we control the start-up and anticipation of the operation of said water-flow air cooling device as soon as the temperature inside the building exceeds a predetermined temperature called heatwave temperature Theatwave, which is lower than said activation temperature Tactivation;

[0041] -when the temperature measured inside the building is lower than said setpoint temperature Tconsigne, the opening of the registers of said fresh air inlet from outside and of said air intake from said enclosure is controlled simultaneously and the operation of said thermodynamic exchanger is activated in heating mode;

[0042] - during the operation of said trickle air cooling device water, we measure the temperature and humidity of the outside air and of the air present in the vicinity of said intake of air from said building and we bring into said enclosure either fresh air from outside, or air taken from the building, according to said temperature and humidity measurements.

[0043] Thanks to this installation and this process, it is possible to minimize the overall energy consumption of the installation via a virtuous source (water) while ga- ensuring compliance with temperature guidelines.

[0044] The invention also relates to a computer program comprising code instructions for implementing the method according to one of the above characteristics, when executed on a computer such as a programmable logic controller or a computer.

[0045] It also relates to a computer memory in which a computer program is stored, said program comprising code instructions which enable a machine to implement the steps of the process according to one of the preceding characteristics, when this program is executed by said machine. DESCRIPTION OF THE FIGURES

[0046] Other features and advantages of the invention will become apparent from the description which will now be given, with reference to the attached drawings, which represent, by way of example but not limitation, one possible embodiment.

[0047] On these drawings:

[0048] [Fig.1] is a very schematic view of an installation in which the process according to the invention is likely to be implemented, and more particularly intended to illustrate a first mode of operation of the installation;

[0049] [Fig.2] is a view analogous to [Fig.1], intended to illustrate another mode of operation. operation of the installation;

[0050] [Fig.3] is a view analogous to [Fig.1], intended to illustrate yet another mode of operation of the installation;

[0051] [Fig.4] is a view analogous to [Fig.1], intended to illustrate a fourth mode of operation of the installation. DETAILED DESCRIPTION OF THE INVENTION

[0052] A first aspect of the invention relates to an air conditioning installation I of a building B, as defined in the attached claim 1.

[0053] With reference to [Fig.1], it can be seen that this installation I comprises an enclosure 1 which is in the form of a unitary block.

[0054] Advantageously, the enclosure 1 is a single-unit structure that can be delivered ready to operate. It is preferably made of an all-aluminum structure (chassis and body), which gives it particularly effective corrosion resistance.

[0055] Such an enclosure is preferably installed on the (preferably flat) roof of building B, which is designated T in [Fig. 1]. In a different embodiment, the enclosure may be in a technical room or next to building B.

[0056] The references INT respectively designate the interior of building B to be heated or cooled, and EXT the exterior of the building, which is the source of fresh air.

[0057] The inlet of enclosure 1 located on the left of [Fig.1] has been referenced as EAN, which constitutes a fresh air inlet, i.e. from the outside EXT.

[0058] The base of enclosure 1 is also provided with another EAR inlet, which communicates with building B through an opening made in the roof T. It is described as a return air inlet in the sense that the air which passes through it is air coming from building B (i.e. "returned" from the building).

[0059] The air that passes through these inlets is identified by arrows Fl and F2. Together they form a first group.

[0060] Enclosure 1 also includes an outlet for the air which has been accepted inside it in the direction of the interior INT of building B. It is referenced SAB in [Fig.1].

[0061] The air that passes through this outlet is identified by arrow F3. It constitutes a second group.

[0062] According to the invention, the enclosure 1 is provided with a set of temperature and humidity sensors which includes at a minimum a temperature sensor C and a humidity sensor which prevail outside said building and a temperature sensor and a humidity sensor which prevail inside said building.

[0063] Advantageously, the installation includes other temperature and humidity sensors (not shown in [Fig.1]), and in particular, in building B, just at the level of the EAR inlet and the SAB outlet, as well as in the vicinity of places where people pass through, that is to say preferably at human height.

[0064] These are, for example, sensors marketed by the company CARREE and MICHELE INSTRUMENTS.

[0065] Each of the additional elements that equip the enclosure of [Fig.1] are described below, starting from the fresh air inlet EAN, i.e. from left to right of [Fig.1],

[0066] Right at the EAN and EAR inputs are R registers which, as is well known, are selective opening means with variable sections. They include, for example, several movable flaps whose opening and closing can be controlled selectively and quantifiably.

[0067] Just downstream of these inlets and considering the direction F4 of air circulation between the fresh air inlet EAN coming from outside said building and the air outlet SAB towards the inside of said building is a fresh air filtering device 2.

[0068] This is a device of a known type which has the function of capturing and stopping undesirable particles contained in the air, of different sizes.

[0069] Between the first group of inlets and the aforementioned second group of outlets, and always in the direction F4 of air circulation between the fresh air inlet EAN coming from outside said building and the air outlet SAB towards the interior of said building building, enclosure 1 is equipped with a water-fed air cooling device 3 and a reversible water / air thermodynamic exchanger 4 configured to operate in temperature cooling or heating.

[0070] The aforementioned cooling device 3 more specifically consists of a high-efficiency direct adiabatic re-cooler, which is formed of perforated heat exchange panels made of rot-proof inorganic material.

[0071] It is watered by trickling water, from top to bottom.

[0072] The operating principle of this cooler is that air passes horizontally through the cooler and is humidified by contact with wet surfaces. The air is cooled solely by evaporation, which requires no external power supply.

[0073] At the top of this adiabatic cooler is a water distributor (not shown) which provides a uniform supply throughout the device.

[0074] The excess water is used to rinse the support forming the cooler to remove any debris and mineral matter that may be deposited on the medium after the humidification cycle.

[0075] The water that has passed through this device without evaporating on contact with the air is collected in a container (also not shown), for example made of stainless steel, placed at its base and is recycled to the top of the device, with additional water added if necessary.

[0076] The water level in the recovery tank remains constant, by measuring the level with connected probes and by optimizing the supply of water (which allows the water in the tank to be diluted and is loaded with mineral salts).

[0077] The specific design of this device ensures the complete absence of droplet and aerosol generation when air humidification is activated. In all the accompanying figures, this device 3, when in operation (see [Fig. 1]), is shown with water droplets. Conversely, when not in operation (see the other figures), it is shown as a simple rectangle.

[0078] At the outlet of device 3 is provided a reversible water / air thermodynamic exchanger 4 configured to operate in cooling or heating temperature.

[0079] The expression "reversible water / air thermodynamic exchanger" refers, of course, to a machine in which water circulates in a BE loop. Its circuit consists of a compressor, an expansion valve and two heat exchangers, namely an evaporator and a condenser.

[0080] To facilitate consultation of [Fig.1], only interchanges 40 and 41 have been represented here.

[0081] Since it is a reversible device, each of the heat exchangers can function as a condenser or an evaporator.

[0082] This is why they bear the double reference 40 / 41 and 41 / 40 in [Fig.1]. Their operating mode is determined by the regulation of the machine which acts on a reversing valve of the thermodynamic cycle.

[0083] More specifically, one of the exchangers 40 / 41 is positioned just downstream of device 3 and upstream of outlet SAB, while the other 41 / 40 is arranged downstream on the water loop BE.

[0084] Between the first exchanger 40 / 41 and the outlet SAB is arranged an air extraction system 5 with a fan which has the function of allowing the admission of air inside the enclosure, via the inlets EAN and EAR.

[0085] Finally, the installation I includes means (not shown) designed to, based on the measurements taken by said sensors C, control either the operation of one or the other of the water-fed air cooling devices 3 and thermodynamic exchanger 4, or to switch them off. Preferably, this is an automated system including a computer.

[0086] Another aspect of the invention relates to a method of controlling the installation such as that described with reference to [Fig.1].

[0087] Such a process comprises the following steps:

[0088] - determine a setpoint temperature Tsetpoint inside said building B not to be exceeded;

[0089] - continuously or intermittently measure the temperature and humidity at inside building B;

[0090] - as soon as said temperature measured inside building B is equal to a temperature activation temperature Tactivation, this activation temperature being lower than the setpoint temperature Tsetpoint, control the start-up and operation of said water-flow air cooling device 3;

[0091] - as soon as said temperature measured inside the building is equal to or above above said setpoint temperature Tconsigne, control the shutdown of said water-flow air cooling device 3, as well as the start-up and operation of said thermodynamic exchanger 4 in air cooling mode.

[0092] Thus, with reference to the diagram in [Fig.1], the hot air from outside is cooled by device 3, then blown into the building.

[0093] Under these conditions, the "adiabatic cooling" function (device 3) takes priority over thermodynamics (device 4). The objective is to limit the temperature rise of the building and to delay the action of the thermodynamic exchanger 4 as much as possible.

[0094] When the ambient temperature inside the building approaches the setpoint, adiabatic cooling is activated. If the temperature inputs are too important, we reach the activation temperature of the thermodynamic exchanger and we control the shutdown of device 3. This corresponds to the situation of [Fig.2] in which the "hot" air from outside passes over the cold exchanger 40 / 41 and is then blown into the building for cooling.

[0095] The calories at the exchanger 41 / 40 are, for their part, evacuated to the BE water loop.

[0096] In a particular embodiment, when the ambient temperature falls below the thermodynamic deactivation point, the device 4 stops and the adiabatic cooler 3 reactivates.

[0097] A non-limiting example of the implementation of such a method is described below.

[0098] Suppose we are dealing with a building for which the setpoint temperature Tconsigne is set at 26°C.

[0099] When in the morning during a warm period, the temperature measured inside the building exceeds 24°C, which is the activation temperature Tactivation, device 3 is activated in order to contain the temperature rise between 24°C and 26°C.

[0100] Beyond a temperature of 26°C measured inside the building, device 3 stops, and device 26°C takes over to air condition the building and maintain a maximum of 26°C.

[0101] Thus, device 3 made it possible to delay, or even cancel, the activation of device 4, resulting in significant energy savings. The implementation of thermodynamic device 4 then serves as an alternative solution to ensure comfort.

[0102] In order to cool the air inside the building and assuming that the measured temperature of the outside air is lower than that inside, then outside air is injected into the inside, while the two devices 3 and 4 are inactive.

[0103] More specifically, in the particular situation in which the outside air is fresher than the air inside building B, neither of the devices 3 and 4 is activated and the closing of the registers R of the EAR inlet is controlled, so that only fresh outside air is admitted into enclosure 1 and is blown into building B.

[0104] In another situation where the ambient air of building B needs to be heated, the activation of the device is controlled only in heating mode (as illustrated in [Fig.4]) so that both air from the building and fresh air are accepted into enclosure 1. This mixture, the proportion of which can be controlled according to the temperature of the air from the building, is heated by contact with the first hot exchanger 40 / 41 and is then blown into the interior INT of building B. The excess cooling at the second exchanger 41 / 40 of device 4 is, in turn, discharged into the water loop BE.

[0105] According to one embodiment of this method, it comprises a step of measuring the humidity of the indoor air and, assuming that this humidity exceeds a reference threshold, we limit ourselves to controlling the start-up and operation of the thermodynamic exchanger 4, that is to say without starting up the said water trickle air cooling device 3.

[0106] This helps to maintain comfort inside the building.

[0107] According to another embodiment of this process, as soon as the temperature outside or inside the building exceeds at least a predefined threshold on a given day J1, the "heatwave" status is allocated to that day J1 and, at least on the following day J2, the start-up and anticipation of the operation of said water-flow air cooling device is controlled as soon as the temperature inside the building exceeds a predetermined temperature called the heatwave temperature Theatwave, which is lower than said activation temperature Tactivation.

[0108] Thus, this regulation makes it possible to detect a hot episode via the outside temperature, the ambient temperature inside the building and the offset of the ambient temperature from the setpoint on day Jl.

[0109] Assuming that the weather conditions on days J1 and J2 are generally considered to be similar, the regulation can therefore react on day J2 by ​​"learning" compared to day J1.

[0110] Thermodynamic machines alone do not allow anticipation of their activation without a significant impact on daily consumption

[0111] Due to its low consumption, adiabatic technology offers the possibility of anticipating its activation without significant impact on daily electricity consumption, thus avoiding any compromise.

[0112] The coupled adiabatic / thermodynamic solution then allows significant energy savings while guaranteeing comfort.

[0113] This regulation offers a detection of a HEATWAVE mode triggering the anticipation functions on day J2. Conversely, a "return to normal" detection can be provided to return to a "mid-season SUMMER" management of the cooling.

[0114] Again, a non-limiting example of this embodiment is given below.

[0115] It is assumed that on August 10 at 12:00, the indoor temperature is 25°C, while that the outside temperature is 30°C for a setpoint temperature of 26°C.

[0116] From then on, adiabatic cooling via device 3 is activated at 12 o'clock.

[0117] It is assumed that the heat inputs are such that the indoor temperature exceeds 26°C at 1 p.m., so that device 3 stops, while device 4 starts up to air condition the building until it is closed at 7 p.m.

[0118] With the outside temperature approaching 30°C, installation I detects a period of heat wave.

[0119] The following day, and because the installation detected a heatwave, the building's cooling via device 3 is activated as soon as the temperature in- external is greater than or equal to 22°C at lOh.

[0120] Under these conditions, the heat gains are significant, but the anticipated adiabatic cooling helps to contain the temperature rise in the building

[0121] Let us now assume that the heat inputs are such that the indoor temperature exceeds 26°C at 5:30 p.m., the adiabatic cooling via device 3 stops, the thermodynamics (via device 4) starts to air condition the building until its closure at 7 p.m.

[0122] Thus, the electricity consumption between August 10 and 11 was reduced by the equivalent of 4h30 of activation of the compressors of device 4.

[0123] Finally, according to a particular embodiment, during the operation of said water-flow air cooling device 3, the temperature and humidity of the outside air EXT and of the air present in the vicinity of said return air inlet EAR from said building B are measured and either fresh air from outside EXT or returned air from building B is brought into said enclosure 1, depending on said temperature and humidity measurements.

[0124] In other words, according to this embodiment, the optimal conditions between all fresh air and return air are calculated in real time, the objective being to maximize the cooling power generated by device 3 while reducing water consumption.

[0125] Thus, for example, it is considered that the installation I is capable of blowing an air flow of 20,000m3 / h.

[0126] The external conditions (temperature / humidity) are as follows: 35°C / 30%.

[0127] The air supply temperature in the building after adiabatic cooling is 22°C and the water consumption of device 3 is 1601 / h.

[0128] As for the returned air, the conditions for returning the air from the building (temperature / humidity) are as follows: 25°C / 40%.

[0129] The blowing temperature after adiabatic cooling by device 3 is 16.6°C and the water consumption is 1001 / h.

[0130] According to the method of the invention, the blowing conditions are calculated in real time and the installation I will automatically operate in all recirculated air, that is to say with the registers R of the EAN inlet closed.

[0131] The gain in cooling power is 37kW, and that on water consumption is 601 / h.

[0132] The reversible water / air thermodynamic exchanger 4 shown in the attached figures is a so-called “roof top” exchanger, i.e. placed on the roof of a building.

[0133] However, it could be placed in a technical room or next to the building. Furthermore, it could be a dual-flow heat exchanger, or a dual-flow heat exchanger with heat recovery.

Claims

Demands

1. Air conditioning installation (I) of a building (B), which includes an enclosure (1), which comprises: on the one hand, a fresh air inlet (EAN) from the outside (EXT) of said building (B), and a return air inlet (EAR) from said building (B), which together form a first group; on the other hand, an air outlet (SAB) towards the inside (INT) of said building (B), which forms a second group, characterized in that it further comprises: a set of temperature sensors (C) and a humidity sensor comprising at least a temperature sensor and a humidity sensor which prevail outside (EXT) of said building (B) and a temperature and humidity sensor which prevail inside (INT) of said building (B);between said first group and said second group and in the direction of air circulation between said first fresh air inlet (EAN) from outside (EXT) of said building (B) and said air outlet (SAB) towards the inside (INT) of said building (B), a water-fed air cooling device (3) and a reversible water / air thermodynamic exchanger (4) configured to operate in cooling or heating mode; means configured to, depending on the measurements taken by said sensors (C), control either the operation of one or the other of the water-fed air cooling devices (3) and thermodynamic exchanger (4), or to switch them off.

2. Installation (I) according to claim 1, characterized in that said two inlets (EAN, EAR) forming said first group are provided with registers (R) shaped to be either open or closed, and thus permit air circulation, respectively prevent air circulation through said inlets.

3. Installation (I) according to claim 1 or 2, characterized in that said enclosure (1) contains an air filter (2) which is positioned between said first fresh air inlet (EAN) from outside (EXT) of said building (B) and said water trickle air cooling device (3).

4. A method for controlling the installation (I) according to any one of claims 1 to 3, characterized in that it comprises the following steps: determine a setpoint temperature Tconsigne inside (INT) said building (B) which must not be exceeded; continuously or intermittently measure the temperature and humidity inside (INT) of the building (B); as soon as said temperature measured inside said building is equal to an activation temperature Tactivation, this activation temperature being lower than said setpoint temperature Tconsigne, control the start-up and operation of said water-fed air cooling device (3); as soon as said temperature measured inside (INT) said building is equal to or greater than said setpoint temperature Tconsigne, control the stop-down of said water-fed air cooling device (3), as well as the start-up and operation of said thermodynamic exchanger in air cooling mode (4).

5. A method according to claim 4, characterized in that it includes a step of measuring the hygrometry of the indoor air (INT) and that, in the event that this hygrometry exceeds a reference threshold, one limits oneself to controlling the start-up and operation of said thermodynamic exchanger (4), that is to say without starting up said water trickle air cooling device (3).

6. A method according to any one of claims 4 or 5, characterized in that as soon as the temperature outside (EXT) or inside (INT) of the building exceeds at least a predefined threshold on a given day J1, the status "heatwave" is allocated on that day J1 and that, at least on the following day J2, the start-up and anticipation of the operation of said water-fed air cooling device (3) is controlled as soon as the temperature inside (INT) of the building (B) exceeds a predetermined temperature called heatwave temperature Theatwave, which is lower than said activation temperature Tactivation.

7. A method for controlling the installation (I) according to claim 2, in combination with any one of claims 4 to 6, characterized in that, when the temperature measured inside (INT) of the building (B) is lower than said setpoint temperature Tsetpoint, the opening of the registers of said fresh air inlet from outside (EXT) and of said return air inlet (EAR) in said enclosure (1) is controlled simultaneously and the operation of said thermodynamic exchanger (4) is activated in heating mode.

8. A method according to any one of claims 4 to 7, characterized in that, during the operation of said water-fed air cooling device (3), the temperature and humidity of the outside air (EXT) and of the air present in the vicinity of said return air inlet (EAR) from said building (B) are measured and either fresh air from outside (EXT) or returned air from building (B) is brought into said enclosure, according to said temperature and humidity measurements.

9. Computer program comprising code instructions for carrying out the method according to any one of claims 4 to 8, when executed on a computer such as a programmable logic controller or a computer integrated within an installation according to any one of claims 1 to 3.

10. Computer memory in which a computer program is stored, said program comprising code instructions which enable a machine to carry out the steps of the process according to any one of claims 4 to 8, when this program is executed by said machine integrated within an installation according to any one of claims 1 to 3.