WO2011101694A1

WO2011101694A1 - Set of equipment for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat

Info

Publication number: WO2011101694A1
Application number: PCT/HU2011/000015
Authority: WO
Inventors: Péter PÁL
Original assignee: Pal Peter
Priority date: 2010-02-16
Filing date: 2011-02-14
Publication date: 2011-08-25
Also published as: HUP1000092A2; HU229715B1; HU1000092D0

Abstract

The invention relates to set of equipment for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat, which has at least one air supply unit having a blower fan, an air temperature setting part-unit and a control part-unit controlling them, and a heat dissipation unit collecting the waste heat of the waste generating source units at least partly, where the air temperature setting part-unit contains a heat exchanger, and the heat dissipation unit contains a pipe carrying a medium with a higher energy content and a pipe carrying a medium with a lower energy content. The solution according to the invention is based on that the heat exchanger (32c) of the air temperature setting part-unit (32) of the air supply unit (30) is inserted between the pipe (3 a) of the heat dissipating (3) unit carrying a medium with a higher energy content and its pipe carrying a medium with a lower energy content (3b), or a supplementary heat exchanger part- unit (10) having a forward medium-forwarding pipe (11) and a return medium-forwarding pipe (12) is inserted between the pipe (3 a) of the heat dissipation unit (3) carrying a medium with a higher energy content and its pipe carrying a medium with a lower energy content (3b), the forward medium-forwarding pipe (11) of the supplementary heat exchanger part-unit (10) is connected to the input stub (32a) of the air temperature setting part-unit (32) of the air supply unit (30), while the return medium-forwarding pipe (12) of the supplementary heat exchanger part-unit (10) is connected to the output stub (32b) of the air temperature setting part-unit (32) of the air supply unit (30).

Description

Set of equipment for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat

The invention relates to a set of equipment for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat, which has at least one air supply unit having a blower fan, an air temperature setting part-unit and a control part- unit controlling them, and a heat dissipation unit collecting the waste heat of the waste generating source units at least partly, where the air temperature setting part-unit contains a heat exchanger, and the heat dissipation unit contains a pipe carrying a medium with a higher energy content and a pipe carrying a medium with a lower energy content.

Various building engineering units are used in every case for the operation of different buildings, such as, for example, hypermarkets, office buildings, catering facilities, stores and shopping centres. Such building engineering equipment involves, for example, water and heating-water supply units, ventilation and air-conditioning networks, exhaust equipment and equipment for pumping fresh air inside the building. Numerous solutions have been elaborated for reducing the operation costs of such large buildings.

The invention registered under no. HU 206.153 relates to ventilation equipment suitable for improving air quality, for example, in closed spaces for human use, mainly kitchens, which has an exhaust screen with a grease catcher filter insert, an exhaust fan, a house and, in a given case, additional heating units suitable for heating the fresh air pumped into the space used, as well as a combined air technology unit suitable for pumping fresh air and removing used air. The solution is based on that in the casing there is a recuperative heat exchanger, in the lower space of which facing the exhaust screen there is the exhaust fan case, while in its upper space further away from the exhaust fan there is the blower fan case. The house contains a downward separator channel, suction channel and drain channel. A coaxial air duct for supplying fresh air and removing used air is allocated to the house, and the internal pipe of this air duct carrying fresh air is connected to the heat exchanger, while its external pipe surrounding the internal pipe is connected to the house. The disadvantage of this solution is that it can only be used efficiently in a small space, and its energy consumption does not make it suitable for economical use in larger buildings.

The invention described in patent application no. HU P 99 04546 relates to a building equipped with a heating and cooling system in which there is solar energy powered floor heating and fresh air heating. The solution is based on that the floor heating is constructed in an at least double-skin pillared building, in a closed air circulating system, which is heated by a closed water circulating system heated with solar collector equipment in a heat exchanger belonging to it, and the fresh air heating is connected to a pipe which is laid down outside of the house under the ground along a relatively long path, favourably below the frost line.

The advantage of the solution is that it uses solar and geothermal energy, i.e. alternative energy sources to supply some of the energy needed for the operation of the building. However, its disadvantage is that the efficient "tapping" of these energy sources depends significantly on the weather conditions, they require significant investment and the area in the environment of the given building must also fulfil certain requirements. Consequently, this solution can only be realised within reasonable limits in the case of smaller new buildings situated in an unrestricted environment.

Patent specification no. HU 165.670 relates to equipment suitable for the ventilation of rooms used mainly for agricultural purposes, first of all for accommodating animals. The equipment is based on that it has a unit dividing the air carried by the fan into ventilation air flow and evaporation air flow, and a sprinkler for humidifying the evaporation air, furthermore it has a ventilation air pipe and a humidified evaporation air pipe connected to the air cooler constructed as a surface heat exchanger, and possibly the side of the air cooler next to the evaporation air can be connected to the air precooler constructed as a surface heat exchanger via a connection pipe, while the side of the precooler near the fresh air is connected to the suction pipe of the fan, and the heating unit suitable for heating the ventilation air can be connected to the ventilation air inlet pipe- However, the disadvantage of this solution is that the energy consumption of its heating unit used for heating air is not controlled, and during the winter period the operation of the equipment is rather expensive. Furthermore, a general deficiency of the known solutions for the building engineering operation of large buildings is that they do not regard the whole of the building as one single and complex power engineering unit, and consequently instead of reaching the minimum level of energy consumption of the whole building as one unit, they attempt to reach the minimal energy consumption of the individual building engineering sub-systems as discrete consumers operating in the building, which results in significant extra operation costs.

Our aim with the equipment according to the invention is to eliminate these known deficiencies and create a version, which enables efficient utilisation of the energy of the waste heat generated inside the building, as a result of which the building operation costs can be significantly reduced. Our further aim was to construct the solution from simple units and make it easy to realise in the case of newly constructed buildings and also in the case of already operating buildings.

The inventive idea is based on the recognition that if the entire internal space of a given building is treated as an integrated unit, and the amount of energy produced and consumed by the building engineering equipment, especially by the air treatment system and by other sources changing the physical parameters of the air inside the space, is also treated uniformly, furthermore, on the basis of this air temperature and pressure conditions are created in the internal space of the building, where the value of the dominant pressure in there is at least the same as the pressure of the environment outside the building or higher in a given case, then in the case that the doors or windows of the building are opened it can be avoided to allow a significant amount of colder air mass into the internal space of the building, as because of the internal overpressure free air flows out from inside while the entrance doors are open.

The inventive idea also included that equipment normally operating in such buildings - due to the function of such equipment - can be regarded as a significant source of heat, e.g. the waste heat released during cooking by the open kitchens in shopping centres, the unused waste heat "taken away" from the refrigerating compartment occurring on the output side of the chiller counters at points of sale where food and other chilled products are sold, and the servers and other high-performance IT or telecommunication equipment and electric devices operated in office buildings release such an amount of heat into the air space of the building, the reasonable utilisation of which could be realised. Such waste heat represents such a large amount of thermal energy, the utilisation of which by a set of suitable equipment would be simple to realise during the air technology operation of the building, that is the waste heat could be used for useful purposes, which could significantly reduce external energy consumption.

The solution according to the invention was based on the recognition that if the unused thermal energy of the units operating in the building and consuming other energy but producing a utilisable amount of heat during their operation is collected with the help of a novel heat exchanger and heat forwarding system unlike the known systems and satisfying specific physical characteristics, which contains a heat dissipation unit or supplementary heat exchanger operating at a low temperature but circulating a heat transmitting medium of a desired mass flow and fitted in a way unlike the ordinary way, and its fittings, then the fresh air or air mixture to be entered into the internal space of the building can be heated with the collected waste heat in a way and to such an extent, which is enough for maintaining the temperature of the air inside the building at a desired level and also for creating the desired pressure and air flow conditions, and by this the desired aim can be achieved.

In accordance with the set aim the set of equipment according to the invention for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat - which has at least one air supply unit having a blower fan, an air temperature setting part-unit and a control part-unit controlling them, and a heat dissipation unit collecting the waste heat of the waste generating source units at least partly, where the air temperature setting part-unit contains a heat exchanger, and the heat dissipation unit contains a pipe carrying a medium with a higher energy content and a pipe carrying a medium with a lower energy content - is constructed in such a way that the heat exchanger of the air temperature setting part-unit is inserted between the pipe of the heat dissipation unit carrying a medium with a higher energy content and its pipe carrying a medium with a lower energy content.

Also in accordance with the set aim, the set of equipment according to another realisation of the invention for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat - which has at least one air supply unit having a blower fan, an air temperature setting part-unit and a control part-unit controlling them, and a heat dissipation unit collecting the waste heat of the waste generating source units at least partly, where the air temperature setting part-unit contains a heat exchanger, and the heat dissipation unit contains a pipe carrying a medium with a higher energy content and a pipe carrying a medium with a lower energy content - is constructed in such a way that a supplementary heat exchanger part-unit having a forward medium-forwarding pipe and a return medium-forwarding pipe is inserted between the pipe of the heat dissipation unit carrying a medium with a higher energy content and its pipe carrying a medium with a lower energy content, the forward medium- forwarding pipe of the supplementary heat exchanger part-unit is connected to the input stub of the air temperature setting part-unit of the air supply unit, while the return medium-forwarding pipe of the supplementary heat exchanger part-unit is connected to the output stub of the air temperature setting part-unit of the air supply unit.

A further criterion of the set of equipment according to the invention may be that it has at least one signalling part-unit providing information relating to the condition of one or more building engineering units of the building and/or at least one sensor suitable for determining the physical characteristics representing the air condition, practically the air flow in the internal space of the building, and the signalling part-unit and/or the sensor is connected to the control part-unit of the air supply unit.

In the case of another version of the set of equipment the sensor contains an internal signal situated inside the building and an external signal generator situated outside the building, where the internal signal generator and the external signal generator are for measuring the same physical characteristics, practically pressure or temperature, and the sensor has a difference- identifying unit processing the signals sent by the internal signal generator and the external signal generator.

In the case of another different practical example of the invention an information-storing and providing part-unit containing data and functions relating to the physical characteristics of the building is allocated to the building, and via an information-forwarding network direct or indirect signalling connection is established between the information-storing and providing part-unit and the control part-unit.

In the case of a further different realisation of the set of equipment the air temperature setting part-unit has a heat exchanger with a large heat transfer surface dimensioned for a low temperature, e.g. 35/25 °C.

From the aspect of the set of equipment according to the invention it may be favourable, if the air supply unit has an external air intake regulator and, in a given case, an internal air intake regulator, and the external air intake regulator and, in a given case, the internal air intake regulator is connected to the control part-unit via an intervention channel.

In the case of a possible version of the set of equipment with a supplementary heat exchanger part-unit, in the forward medium-forwarding pipe and/or return medium-forwarding pipe of the supplementary heat exchanger part-unit there is a flow regulator, and via an intervention channel signalling connection is established between the control part-unit and the flow regulator. The forward medium-forwarding pipe of the supplementary heat exchanger part-unit is connected to a heat producing unit, or the forward medium-forwarding pipe of the supplementary heat exchanger part-unit is connected to a heat transfer medium heating unit.

In the case of a further different realisation of the set of equipment with a supplementary heat exchanger part-unit the supplementary heat exchanger part-unit is a heat exchanger dimensioned for maximum 40 °C.

The set of equipment according to the invention has numerous favourable characteristics. The most important one of these is that low-temperature waste heat, which has not been used for reaching air technology or air treatment objectives so far, can be practically completely utilised, as a result of which a significant reduction in energy consumption can be realised during the operation of the buildings, which results in a significant cost reduction too.

It can also be regarded as an advantage that in the arrangement according to the invention it can also be realised in the case of already operating buildings, so the operation costs of such buildings can be significantly reduced too, and the reconstruction costs are returned within a short period of time.

A further advantage is that in the case of using the solution according to the invention more comfortable environmental conditions can be realised on the peripheral parts of the buildings, e.g. near the entrances to provide much more favourable circumstances for the services operating at such locations and also for the people working or passing there.

Another advantage is that the set of equipment can be assembled from known structural elements, so it is simple to manufacture and install, and its operation does not require any more intensive use of live labour than that of the known versions. Below the set of equipment according to the invention is described in detail in connection with practical examples, on the basis of drawings. In the drawings figure 1 is the schematic view of a version of the set of equipment,

figure 2 is the schematic view of another version of the set of equipment,

figure 3 is the schematic view of a further different version of the set of equipment.

Figure 1 shows a version of the set of equipment according to the invention, where the building 1 is a hypermarket. In the building 1 at least a part of the source units 2 is formed by chiller counters used for chilling food products to be sold. In this case the waste heat 2a released by the source unit 2 is formed by the amount of heat dissipated from the storage compartment of the chiller counters, which heat is guided to the supplementary heat exchanger part-unit 10 inserted between the pipe carrying a medium with a higher energy content 3 a and the pipe carrying a medium with a lower energy content 3 b both belonging to the heat dissipation unit 3. The supplementary heat exchanger part-unit 10 has a forward medium-forwarding pipe 1 1 and a return medium-forwarding pipe 12, which - in the case of the present form of execution - are connected to the heat exchanger 32c of the air temperature setting part-unit 32 of the air supply unit 30. The forward medium-forwarding pipe 11 of the supplementary heat exchanger part-unit 10 is connected to the input stub 32a of the heat exchanger 32c, while the return medium- forwarding pipe 12 of the supplementary heat exchanger part-unit 10 is connected to the output stub 32b of the heat exchanger 32c, and so the heat transfer medium carries the heated medium from the supplementary heat exchanger part-unit 10 towards the heat exchanger 32c of the air temperature setting part-unit 32 of the air supply unit. Because of the use of a medium of a relatively low temperature, 10-40 °C, as compared to the heat transfer medium temperature commonly used for heating, practically the heat exchanger 32c of the air temperature setting part- unit 32 of the air supply unit 30 should have a large heat transfer surface 32d dimensioned for about 35/25 °C, as in this way the air to be entered in the internal space la of the building 1 can be heated sufficiently even with a heat transfer medium of a lower temperature, e.g. 10-40 °C. The air heated to a temperature within a favourably selected temperature range and blown into the internal space la of the building 1 creates temperature and pressure conditions during the cold winter period where no great amounts of cold air can get in from the external environment lb surrounding the building 1 because of the pressure conditions prevailing inside the internal space la of the building 1, as a result of which persons anywhere inside the internal space la of the building 1 feel sufficiently comfortable. Besides the air temperature setting part-unit 32 the air supply unit 30 - in the case of the present form of execution - includes the blower fan 31, the internal air intake regulator 33 and the external air intake regulator 34 responsible for producing air of the desired composition, and the control part-unit 35. The task of the control part-unit 35 is to operate the blower fan 31, the external air intake regulator 34 and, in a given case, the internal air intake regulator 33 and the flow regulator 13 as desired, by giving instructions via the intervention channels 35b. The flow regulator 13 can also be a regulator valve fitted in the return medium-forwarding pipe 12 of the supplementary heat exchanger part-unit 10, or even the circulating pump. The flow regulator 13 is characterised by that with its help the amount of the heat transfer medium flowing inside the forward medium-forwarding pipe 11 and return medium-forwarding pipe 12 of the supplementary heat exchanger part-unit 10 can be changed. In the case of the present version the role of the flow regulator 13 is filled by a valve connected to the control part-unit 35 via the intervention channel 35b.

Figure 1 also shows that the control part-unit 35 also has an information-forwarding channel 35a, through which - in the case of the present form of execution - a signal-forwarding connection is established between the control part-unit 35 and at least one sensor 20 containing an internal signal generator 21, an external signal generator 22 and a difference-identifying unit 23/

It needs to be pointed out here that the signal-forwarding connection between the control part- unit 35 and the sensor 20 can be direct or indirect, and signal forwarding can take place via wired or wireless connection.

In the present case the sensor 20 is a pressure sensor or a thermometer, the internal signal generator 21 of which is situated inside the internal space la of the building 1, while its external signal generator 22 is situated outside the internal space la of the building 1, in its external environment lb. In this way, on the basis of the pressure or temperature value measured by the internal signal generator 21 and the external signal generator 22 - obviously different values in the winter period - the different identifying unit 23 determines the difference and sends the result obtained to the control part-unit 35 via the information-forwarding channel 35a.

In the interest of the safe operation of the set of equipment the heat producing unit 40 may also be connected to the forward medium-forwarding pipe 1 1 of the supplementary heat exchanger part-unit 10, and the heat producing unit 40 can release heat into the forward medium- forwarding pipe 1 1, if the temperature of the heat transfer medium flowing from the supplementary heat exchanger part-unit 10 into the forward medium-forwarding pipe 11 is not high enough for the heat exchanger 32c of the air temperature setting part-unit 32 of the air supply unit 30 to heat the air flowing though it to the desired temperature.

The set of equipment shown in figure 1 operates as described below. At regular intervals the sensor 20 determines a physical parameter of the air measured by the internal signal generator 21 and the external signal generator 22, from which, with the help of the difference-identifying unit 23, a conclusion can be drawn relating to the air condition, favourably the air flow inside the internal space la of the building 1. The value obtained is sent via the information-forwarding channel 35a directly or indirectly to the control part-unit 35 of the air supply unit 30. On the basis of the signal received the control part-unit 35 can send an command via the intervention channels 35b to the external air intake regulator 34 to regulate the louvers of the air channel connected to the external environment lb of the building 1, and, in a given case, to the internal air intake regulator 33 to regulate the louvers of the air channel connected to the internal space Is of the building 1, to start or stop the blower fan 31 of the air supply unit 30, and to allow or stop the flow of the heat transfer medium with the help of the flow regulator 13 in the cycle formed by the supplementary heat exchanger part-unit 10 - forward medium-forwarding pipe 11 - air temperature setting part-unit 32 - return medium-forwarding pipe 12. If the air entered by the internal air intake regulator 33 and the external air intake regulator 34 into the air temperature setting part-unit 32 of the air supply unit 30 is colder than what is needed to create and maintain the necessary temperature conditions inside the internal space la of the building 1, then the control part-unit 35 opens the flow regulator 13 via its intervention channel 35b and makes the hot heat transfer medium flow from the supplementary heat exchanger part-unit 10 through the forward medium-forwarding pipe 11 towards the input stub 32a of the air temperature setting part-unit 32.

Because of the large heat transfer surface 32d, even with a heat transfer medium of a lower temperature, between 10-40 °C, the hot heat transfer medium entering the heat exchanger 32c of the air temperature setting part-unit 32 through the input stub 32a is able to heat the external air or air mixture entering the blower fan 31 to a temperature suiting the internal space la of the building 1. In this way, due to the amount and the physical characteristics of the air entered into the internal space la of the building 1 by the blower fan 31 of the air supply unit 30, pressure conditions can be created in the internal space la, which prevent large amounts of colder air from flowing from the external environment lb of the building 1 into the internal space la of the building 1 and having an unfavourable influence on the feeling of comfort of the people inside.

When the signal sent by the sensor 20 to the control part-unit 35 changes, the control part-unit 35 stops the flow of the heat transfer medium between the supplementary heat exchanger part- unit 10 and the air temperature setting part-unit 32 until the signal coming from the sensor 20 requires it to start the flow again.

If the amount of the waste heat 2a deriving from the source units 2 is not enough to heat the heat transfer medium to the desired temperature of 10-40 °C inside the supplementary heat exchanger part-unit 10, then the control part-unit 35 orders the heat producing unit 40 to enter heat into the forward medium-forwarding pipe 11 of such an amount, with which a heat transfer medium of the desired temperature can be produced at the input stub 32a.

Figure 2 shows a different form of execution of the set of equipment according to the invention. It can be seen that in this case too the set of equipment includes a heat dissipation unit 3 and a supplementary heat exchanger part-unit 10 inserted between the pipe carrying a medium with a higher energy content 3a and the pipe carrying a medium with a lower energy content 3b, which has a forward medium-forwarding pipe 11 and a return medium-forwarding pipe 12. There is also an air supply unit 30, which contains the blower fan 31, the air temperature setting part- unit 32, the internal air intake regulator 33, the- external air intake regulator 34 and the control part-unit 35. The forward medium-forwarding pipe 11 is connected to the input stub 32a of the air temperature setting part-unit 32 of the air supply unit 30, while the return medium-forwarding pipe 12 is connected to the output stub 32b of the air temperature setting part-unit 32.

However, the difference is that here the role of the flow regulator 13 is filled by a circulating pump fitted in the return medium-forwarding pipe 12, which circulating pump is connected to the control part-unit 35 with the help of the intervention channel 35b. Another difference is that the forward medium-forwarding pipe 11 has a heat transfer medium heating unit 60, which can be a direct medium heater or even a further heat exchanger. Obviously this heat transfer medium heating unit 60 can also be connected to the control part-unit 35, but it is not absolutely necessary. A further difference is that the information-forwarding channel 35a of the control part-unit 35 is connected to the information-storing and providing part-unit 50 and/or the signalling part-unit 70.

When the information-storing and providing part-unit 50 is used, the control part-unit 35 does not receive the signals affecting its operation on the basis of currently measured data, but the data and the running control function stored earlier in the information-storing and providing part-unit 50 is responsible for the appropriate operation of the air supply unit 30 and for controlling the control part-unit 35.

When the signalling part-unit 70 is used, the control part-unit 35 does not transfer the value of the physical parameters characteristic of the internal space la of the building 1 via the information-forwarding channel 35a to the control part-unit 35, but it sends the discrete data of one of the building engineering units 4 participating in the operation of the building 1, as information affecting operation, to the control part-unit 35.

The set of equipment shown in figure 2 can operate as described below. When during the operation of the building 1 , for example in the open kitchen the exhausters that can be regarding as building engineering units 4 are switched on, and by this practically artificial pressure reduction is realised inside the internal space la of the building 1, then via the information- forwarding channel 35a the signalling part-unit 70 sends a signal to the control part-unit 35 about the changed operating condition of the building engineering unit 4, and via the intervention channels 35b the control part-unit 35 starts up the blower fan 31 of the air supply unit 30 and, if necessary, the air temperature setting part-unit 32, and it also sets the internal air intake regulator 33 and the external air intake regulator 34 in the required position. If the air entered by the blower fan 31 into the internal space la of the building 1 needs to be heated, then the flow of the heat transfer medium is also started in the cycle formed by the supplementary heat exchanger part-unit 10 - forward medium-forwarding pipe 11 - air temperature setting part-unit 32 - return medium-forwarding pipe 12. If the temperature of the heat transfer medium does not reach the desired value after the waste heat 2a of the source units 2 has been taken by the supplementary heat exchanger part-unit 10, then the heat transfer medium heating unit 60 is also started up to make sure that a heat transfer medium of the necessary temperature reaches the input stub 32a of the air temperature setting part-unit 32. In the following the operation of the air supply unit 30 and the tasks of the control part-unit 35 are the same as in the case of the operation described in connection with figure 1.

If the control part-unit 35 receives the necessary commands from the information-storing and providing part-unit 50, then the information-storing and providing part-unit 50 must be prepared for performing the control task. Such preparation may take place by determining the data relating to the air condition inside the internal space la of the building 1 by performing monthly, weekly, daily or even more frequent hourly measurements, and then determining a runoff curve on the basis of the measured values and a function describing it. The function is entered into the information-storing and providing part-unit 50, and then the control part-unit 35 is controlled with the help of this function, independently from whether such air condition characteristics can be measured in the internal space la or external environment lb of the building 1.

It is also possible to enter a function in the information-storing and providing part-unit 50, which function represents a runoff curve, which can be determined only on the basis of theoretical calculations, without actually making any measurements.

Figure 3 shows another possible version of the set of equipment according to the invention. In this case the waste heat 2a of the source unit 2 enters the heat dissipation unit 3, which can be a completely ordinary cooling cycle. However, as opposed to the generally used refrigeration cycles, the pipe 3a of the heat dissipation unit 3 carrying a medium with a higher energy content is connected to the input stub 32a of the air temperature setting part-unit 32 of the air supply unit 30, while its pipe carrying a medium with a lower energy content 3b is connected to the output stub 32b of the air temperature setting part-unit 32 of the air supply unit 30. At the same time the input stub 32a and the output stub 32b belong to the heat exchanger 32c of the air temperature setting part-unit 32, so the heat dissipation unit 3 directly includes the heat exchanger 32c of the air supply unit 30 for cooling.

Obviously in this case too the air supply unit 30 contains the blower fan 31, the external air intake regulator 34 and in this version the internal air intake regulator 33 too, as well as the control part-unit 35. It is evident that in the interest of the appropriate treatment of the air hitting the blower fan 31 the air supply unit 30 can also contain further auxiliary equipment 36, such as for example a cooling-heating part-unit, which can also be regulated by the control part-unit 35. With the help of the intervention channels 35b the control part-unit 35 operates and regulates the external air intake regulator 34, the internal air intake regulator 33, the blower fan 31 and the heat dissipation unit 3 suiting the requirements.

Through any of the methods described in connection with figure 1 and 2, the information- forwarding channel 35a of the control part-unit 35 can receive information about the physical parameters of the internal space la of the building 1, and it performs its task on the basis of the instructions received via this information-forwarding channel 35a.

During the operation of the set of equipment shown in figure 3 the waste heat 2a dissipated by the heat dissipation unit 3 from the source units 2 is transferred by the heat dissipation unit's 3 own heat transfer medium onto the heat transfer surface 32d of the heat exchanger 32c of the air temperature setting part-unit 32 of the air supply unit 30, where it cools down while it heats the air flowing into the air temperature setting part-unit 32 through the external air intake regulator 34 and, in a given case, through the internal air intake regulator 33. If the heat transfer medium emerging at the output stub 32b of the air temperature setting part-unit 32 and progressing in the pipe 3 b of the heat dissipation unit 3 carrying a medium with a lower energy content has not cooled down appropriately, then it can be cooled down to the prescribed value on the condenser - inserted in the ordinary cooling cycle - not shown in figure 3. In the following the air heated up flowing through the heat transfer surface 32d enters the blower fan 31 , from where it gets inside the internal space la of the building 1. If the air cannot be heated up enough on the heat transfer surface 32d, then the control part-unit 35 can switch on the auxiliary equipment 36 inserted between the air temperature setting part-unit 32 and the blower fan 31, which auxiliary equipment 36 can provide additional heating.

On the basis of the described examples and the method of operation of the set of equipment it can be seen that numerous different sets of equipment can be realised by keeping the essence of the invention. However, it is essential that in the solution according to the invention the amount of heat not used by the equipment operating in the facility is collected, and through a heat exchanger cycle operating at a low temperature, e.g. between 10-40 °C, it is taken to the air temperature setting part-unit of the air supply unit, the heat exchanger of which has an appropriately large surface for being able to heat the air to be entered into the internal space of the building even with an amount of heat carried at a relatively low temperature, as a result of which the air condition inside the building can be influenced and pressure conditions can be created in the internal space, which prevent larger amounts of air from getting in from the external environment in an uncontrolled way.

The set of equipment according to the invention can be favourably used everywhere, where the aim is to optimise the energy consumption of buildings having a fresh air demand, such as hypermarkets and other shopping centres, office buildings, etc.

Claims

1. Set of equipment for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat, which has at least one air supply unit having a blower fan, an air temperature setting part-unit and a control part-unit controlling them, and a heat dissipation unit collecting the waste heat of the waste generating source units at least partly, where the air temperature setting part-unit contains a heat exchanger, and the heat dissipation unit contains a pipe carrying a medium with a higher energy content and a pipe carrying a medium with a lower energy content, characterised by that the heat exchanger (32c) of the air temperature setting part-unit (32) of the air supply unit (30) is inserted between the pipe (3a) of the heat dissipating (3) unit carrying a medium with a higher energy content and its pipe carrying a medium with a lower energy content (3 b).

2. Set of equipment for reducing the energy consumption of buildings containing source units and building engineering units generating waste heat, which has at least one air supply unit having a blower fan, an air temperature setting part-unit and a control part-unit controlling them, and a heat dissipation unit collecting the waste heat of the waste generating source units at least partly, where the air temperature setting part-unit contains a heat exchanger, and the heat dissipation unit contains a pipe carrying a medium with a higher energy content and a pipe carrying a medium with a lower energy content, characterised by that a supplementary heat exchanger part-unit (10) having a forward medium-forwarding pipe (11) and a return medium- forwarding pipe (12) is inserted between the pipe (3a) of the heat dissipation unit (3) carrying a medium with a higher energy content and its pipe carrying a medium with a lower energy content (3b), the forward medium-forwarding pipe (11) of the supplementary heat exchanger part-unit (10) is connected to the input stub (32a) of the air temperature setting part-unit (32) of the air supply unit (30), while the return medium-forwarding pipe (12) of the supplementary heat exchanger part-unit (10) is connected to the output stub (32b) of the air temperature setting part- unit (32) of the air supply unit (30).

3. Set of equipment as in claim 1 or 2, characterised by that it has one or more signalling part-units (70) providing information relating to the condition of one or more building engineering units (4) of the building (1) and/or at least one sensor (20) suitable for determining the physical characteristics representing the air condition, practically the air flow in the internal space (la) of the building (1), and the signalling part-unit (70) and/or the sensor (20) is connected to the control part-unit (35) of the air supply unit (30).

4. Set of equipment as in claim 3, characterised by that the sensor (20) contains an internal signal generator (21) situated inside the building (1) and an external signal generator (22) situated outside the building (1), where the internal signal generator (21) and the external signal generator (22) are for measuring the same physical characteristics, practically pressure or temperature, and the sensor (20) has a difference-identifying unit (23) processing the signs sent by the internal signal generator (21) and the external signal generator (22).

5. Set of equipment as in claim 1 or 2, characterised by that an information-storing and providing part-unit (50) containing data and functions relating to the physical characteristics of the building is allocated to the building (1), and via an information-forwarding network (35a) direct or indirect signalling connection is established between the information-storing and providing part-unit (50) and the control part-unit (35).

6. Set of equipment as in any of claims 2-5, characterised by that the air temperature setting part-unit (32) has a heat exchanger (32c) with a large heat transfer surface (32d) dimensioned for a low temperature, e.g. 35/25 °C.

7. Set of equipment as in any of claims 1-6, characterised by that the air supply unit (30) has an external air intake regulator (34) and, in a given case, an internal air intake regulator (33), and the external air intake regulator (34) and, in a given case, the internal air intake regulator (33) is connected to the control part-unit (35) via an intervention channel (35b).

8. Set of equipment as in any of claims 2-7, characterised by that in the forward medium- forwarding pipe (11) and/or return medium-forwarding pipe (12) of the supplementary heat exchanger part-unit (10) there is a flow regulator (13), and via an intervention channel (35b) signalling connection is established between the control part-unit (35) and the flow regulator (13).

9. Set of equipment as in any of claims 2-8, characterised by that the forward medium- forwarding pipe (11) of the supplementary heat exchanger part-unit (10) is connected to a heat producing unit (40).

10. Set of equipment as in any of claims 2-8, characterised by that the forward medium- forwarding pipe (11) of the supplementary heat exchanger part-unit (10) is connected to a heat transfer medium heating unit (60).

1 1. Set of equipment as in any of claims 2-10, characterised by that the supplementary heat exchanger part-unit (10) is a heat exchanger dimensioned for maximum 40 °C.