FR3095262A1 - Air heating or cooling system and domestic hot water production - Google Patents

Abstract

Air heating or cooling and domestic hot water production system This air heating or cooling and domestic hot water production system (2) comprises an air treatment system (4), in which an air flow (F1) intended to be blown into parts of a room is heated or cooled, a hot water production system (6) producing domestic hot water (12) and water hot for heating an air flow (F1) in the air treatment system (4), and a water circuit (14) in which the hot water produced by the hot water production system ( 6) for the heating circulating, and which passes into the air handling system (4). This air heating or cooling and domestic hot water production system (2) also includes a thermodynamic hot water tank (16), supplied by a cold water network (8). The water circuit (14) in which circulates the water intended for heating in the air treatment system (4) comprises a branch (14b) connected to the thermodynamic hot water tank (16), and the tank d thermodynamic hot water (16) is configured to store (160) water heated by heat exchange with the water contained in the heating water circuit (14). Figure for the abstract: Figure 3

Description

Heating or air cooling and domestic hot water production system

The present invention relates to a system for heating or cooling air and producing domestic hot water.

Air treatment installations use hot water for heating in a known way, and cannot generate fresh air for cooling, which is expensive and logically heavily penalized in terms of energy in the regulatory calculation tools to limit the CO2 emissions and energy consumption. Individual air conditioning solutions are bulky electrically powered units often installed on the facades, on the balcony and including a bulky interior wall, ceiling or console unit. In the collective version, the chilled water production unit can also be provided in the form of a heat pump or collective liquid cooler, mostly outdoors, with the disadvantage of cost and difficulty of installation.

To provide freshness, it is also known to install cooling floors using cold water circulation obtained with a thermodynamic balloon implementing heat exchanges between the water circulating in the cooling floor and a hot water circuit. from the premises. Cooling floors are suitable for individual houses and much less for collective housing. In addition, cooling by water has less reactivity than that of air and has a weak influence on interior comfort because to avoid condensation phenomena on the floor, it is not possible to lower the temperature of the floor too much.

It is these drawbacks that the invention intends to remedy by proposing a system for heating or cooling air and producing domestic hot water with significant energy savings.

To this end, the invention relates to a system for heating or cooling air and producing domestic hot water comprising an air treatment system, in which a flow of air intended to be blown into rooms of a room is heated or cooled, a hot water production system producing domestic hot water and hot water intended to heat an air flow in the air treatment system, and a circuit water in which the hot water produced by the hot water production system for heating circulates, and which passes through the air treatment system. This system for heating or cooling air and producing domestic hot water is characterized in that it further comprises a thermodynamic hot water tank, supplied by a cold water network, in that the circuit of water in which circulates the water intended for heating in the air treatment system comprises a branch connected to the thermodynamic hot water tank, and in that the thermodynamic hot water tank is configured to store water heated by heat exchange with the water contained in the heating water circuit.

Thanks to the invention, the production of domestic hot water and cold cooling water can be combined, which makes it possible to cool an air flow while saving energy compared to a conventional electric air conditioning system. .

According to advantageous but not mandatory aspects of the invention, such a system for heating or cooling air and producing domestic hot water can incorporate one or more of the following characteristics, taken according to any technically admissible combination:

- In the event of a cooling request for a room, the water circulating in the air treatment system is cooled by transferring calories to the water contained in the thermodynamic hot water tank.

- The water contained in the thermodynamic hot water tank, which has been heated by absorbing calories from the water circulating in the air treatment system, is heated a second time by the hot water production system in the event of domestic hot water request.

- The thermodynamic hot water tank includes an evacuation valve, and when a room cooling request occurs and the hot water tank is filled with water at a temperature that does not allow cooling of the water from the air treatment circuit, a quantity of water is evacuated by the evacuation valve until the temperature of the water in the tank is lowered.

- The drain valve is connected to a water recovery system.

- The system includes means for interrupting the fluidic connection between the air treatment water circuit and the thermodynamic balloon.

The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of a system for heating or cooling air and producing domestic hot water in accordance with its principle. , made by way of non-limiting example with reference to the accompanying drawings, in which:

- FIG. 1 is a schematic view of a system for heating or cooling air and producing domestic hot water (DHW) according to the invention;

- Figure 2 is a schematic view similar to Figure 1, in a hot air blowing configuration of an air treatment system of the system of Figure 1;

- Figure 3 is a schematic view similar to Figure 1, in a cold air blowing configuration of the air treatment system;

- Figure 4 is a schematic view similar to Figure 1, in an operating configuration of a lost water thermodynamic tank of the system of Figure 1.

Figure 1 shows a system 2 for air heating or cooling and DHW production. This system 2 comprises an air treatment system 4, in which an air flow F1, intended to be blown into rooms in a room not shown, is heated or cooled. The air treatment system 4 comprises a box 40 in which are provided an exchanger 42 in which heat exchanges take place between the air flow F1 and a water circuit, and an air blower device 44 maintaining the circulation of the air flow F1. The box 40 also includes a distribution plenum 46, from which extend air distribution ducts 47 terminated by blowing vents 48 located in each of the rooms of the room.

This system 2 also comprises a hot water production system 6 producing domestic hot water and hot water intended to heat the air flow F1 in the air treatment system 4. In the example shown, this system 6 for producing hot water is formed by a gas boiler supplied by a gas inlet 60.

The system 2 comprises a first water circuit 7 including a cold water inlet 8 which extends towards a branch directed towards a sanitary cold water network 10. Another branch from the cold water inlet 8 passes in the hot water production system 6 and forms a domestic hot water network 12.

System 2 also comprises a second water circuit 14, independent of water circuit 7. By independent, it is meant that at no place in system 2 the waters circulating in circuits 7 and 14 are not mixed. The water circuit 14 comprises a first branch 14a in which hot water produced by the hot water production system 6 for heating circulates, and which passes into the air treatment system 4, in particular into the interchange 42.

In accordance with the invention, this system 2 further comprises a thermodynamic hot water tank 16, supplied by the cold water inlet 8, and the water circuit 14. The water circuit 14 in which circulates the water intended for heating and cooling the air flow F1 in the air treatment system 4 comprises a second branch 14b connected to the thermodynamic hot water tank 16, which is configured to heat and store water from the circuit 7 heated by the thermodynamic circuit of tank 16.

Thus, the thermodynamic hot water tank 16 is connected downstream of the sanitary cold water inlet 8 and upstream of the hot water production system 6. The thermodynamic tank 16 comprises a tank 160, supplied by the network 7, and which in turn supplies the network 12 via the hot water production system 6.

The thermodynamic balloon 16 comprises an internal thermodynamic circuit 162, which captures part of the thermal energy of the water circulating in the circuit 14 and which passes through a part 164 of the thermodynamic balloon 16, by means of an exchanger 166 and restores it to the water contained in the tank 160 by circulating in a series of tubes wound around the tank 160. A circulation of heat transfer fluid in the thermodynamic circuit 162 is maintained by electrical energy. Thus, the thermodynamic balloon 16 cools the water in branch 14b while it heats the water in tank 160.

The operation of system 2 is as follows. In a conventional heating configuration represented in FIG. 2, the air treatment system 4 only requires the circulation of hot water in the circuit 14. In such a case, the thermodynamic tank 16 is inactive: the water which arrives in the tank 160 by the arrival of cold water 8 comes out at the same temperature and circulates directly to the hot water production system 6 then to the network 12. The water contained in the branch 14a is heated by the hot water production system 6 and is directed directly to the air treatment system 4. The water from the circuit 14 is not directed to the branch 14b, and no heat exchange takes place between the circuits of water 7 and 14. The branch 14b not being supplied with water, it is not shown in Figure 2. The system 2 comprises for this purpose means for interrupting the fluidic connection between the water circuit air treatment 14 and the thermodynamic balloon 16. The interruption of the flow of water d years the branch 14b can be obtained by valves 21 and 22, connected to connection points between the branch 14b and the branch 14a.

The thermodynamic balloon 16 is advantageously used in FIG. 3. In the event of a cooling request for a room, the water circulating in the air treatment system 4 is cooled by transferring calories to the water contained in the thermodynamic balloon 16. For this purpose, the water circulating in the branch 14b therefore passes through the exchanger 166 in which it transfers calories to the heat transfer fluid circulating in the circuit 162. The water circulating in the branch 14b is therefore cooled . The calories taken are returned by the circuit 162 to the water contained in the tank 160, which is therefore heated. There is no water circulation in branch 14a.

The water contained in the thermodynamic tank 16 which has been heated by absorbing calories from the water circulating in the branch 14b, is additionally heated by the hot water production system 6 in the event of a hot water demand. sanitary.

The thermodynamic tank 16 therefore makes it possible to carry out the cooling at a reduced energy cost, because the energy used to cool the water is used to produce hot water simultaneously. The energy problems of electric air conditioning are therefore avoided. Since air conditioning can also be achieved using the hot air outlets already present on the walls, the bulk and assembly of bulky wall-mounted air conditioning units is avoided.

According to an optional aspect represented in FIG. 4, the thermodynamic balloon 16 can comprise an evacuation valve 168, and when a request for cooling of a room takes place and the thermodynamic balloon 16 is filled with water having a temperature too high, not allowing the cooling of the water in the circuit 14, a quantity of water is evacuated through the evacuation valve 168 until the temperature of the water in the tank is lowered by the additional supply of cold water in the tank 160.

According to one example, the drain valve 168 can be connected to a water recovery system 18 for later use, for example to supply a sprinkler system, a toilet flushing system, etc.

According to a variant not shown, instead of a boiler, the hot water production system 6 can be an apartment thermal module (MTA).

In a mode of use that does not involve the air treatment system 4, the system 2 operates only for the production of domestic hot water. The hot water production system 6 heats the water in the circuit 14, which transfers part of its calories to the cold water in the tank 160 of the thermodynamic tank 16. This provides a first level of heating to the water in the circuit 7, then a second level of heating when the water from circuit 7 passes into the hot water production system 6. This improves the coefficient of performance of the hot water production of the system 2, compared to a single use configuration of the hot water production system 6. Using both the energy from the gas, when the hot water production system 6 is a boiler, and the electrical energy consumed by the tank thermodynamics 16 to operate the heat transfers in the circuit 162.

The system 2 can comprise a control unit, not shown, configured to receive electrical signals representative of the operating parameters of the various components and to control the system 2 on the basis of instructions. The setpoint data can be, in particular, an ambient air temperature desired by a user at the level of an ambient thermostat per room, and a domestic hot water pressure requested at the level of the taps of the room. Depending on temperature measurements in the thermodynamic tank 16 and in the water circuit 14, the thermodynamic circuit 162, the hot water production system 6, the air treatment system 4 and the valves 21 and 22 can be controlled by the control unit to select the appropriate configurations for use of the system 2.

Claims (6)

System (2) for heating or cooling air and for producing domestic hot water comprising an air treatment system (4), in which an air flow (F1) intended to be blown into rooms of a room is heated or cooled, a hot water production system (6) producing domestic hot water (12) and hot water intended to heat an air flow (F1) in the treatment system air (4), and a water circuit (14) in which the hot water produced by the hot water production system (6) for heating circulates, and which passes into the treatment system air (4), this air heating or cooling system and domestic hot water production (2) being characterized in that it further comprises a thermodynamic hot water tank (16), supplied by a network of cold water (8), in that the water circuit (14) in which circulates the water intended for heating in the air treatment system (4) comprises a branch (14b) rel ied to the thermodynamic hot water tank (16), and in that the thermodynamic hot water tank (16) is configured to store (160) water heated by heat exchange with the water contained in the circuit d heating water (14). System according to Claim 1, characterized in that in the event of a request for cooling of a room, the water (14) circulating in the air treatment system (4) is refreshed by transferring calories to the water contained in the thermodynamic hot water tank (16). System according to Claim 2, characterized in that the water contained in the thermodynamic hot water tank (16) which has been reheated by absorbing calories from the water circulating in the air treatment system (4) is heated a second time by the hot water production system (6) in the event of a request for domestic hot water (12). System according to one of the preceding claims, characterized in that the thermodynamic hot water tank (16) comprises an evacuation valve (168), and in that when a request for cooling of a room takes place and that the hot water tank (16) is filled with water at a temperature which does not allow the cooling of the water in the air treatment circuit (14), a quantity of water is evacuated by the valve of evacuation (168) until the temperature of the water in the tank (16) is lowered. System according to one of the preceding claims, characterized in that the drain valve (168) is connected to a water recovery system (18). System according to one of the preceding claims, characterized in that it comprises means for interrupting (21, 22) the fluid connection between the air treatment water circuit (14) and the thermodynamic balloon (16 ).