WO2009049673A1

WO2009049673A1 - Method and air conditioning and ventilation system for air conditioning a room

Info

Publication number: WO2009049673A1
Application number: PCT/EP2007/061061
Authority: WO
Inventors: Helmut Buss; Manfred Stellamans
Original assignee: Hansa Ventilatoren- Und Maschinenbau Neumann Gmbh
Priority date: 2007-10-17
Filing date: 2007-10-17
Publication date: 2009-04-23

Abstract

The invention relates to a method and air conditioning and ventilation system for air conditioning a room, comprising an air flow system having an exhaust air flow (AbL) flowing out of the room, an outgoing air flow (FL) delivered to the surroundings of the room, an outside air flow (AL) aspirated from the surroundings of the room, and a supply air flow (ZL) directed into the room, which additionally may be cooled by means of an evaporator (10) of a cold-generating device (10, 11, 14) disposed in the supply air flow (ZL) and connected via coolant lines and at least one compressor (14) to a condenser (11) disposed in the outgoing air flow (FL). A heat reclamation system (15) exchanges energy between the outside air flow (AL) or supply air flow (ZL) and the exhaust air flow (AbL) or outgoing air flow (FL) and the exhaust air flow (AbL) or outgoing air flow (FL) is cooled adiabatically in the flow direction before the condenser (11) of the cold-generating device (10, 11, 14).

Description

Process and ventilation system for the air conditioning of a room

description

The invention relates to a method and a ventilation system for air conditioning a room according to the preamble of claims 1 and 1 1st

From DE 198 13 157 A1 a ventilation system for bivalent air conditioning of a room with a primary air system and a secondary air conditioning system is known. The primary air system designed as an air flow system has an exhaust air flow directed into the surroundings of the room and an inlet air flow directed into the room, which consist of or are composed of the exhaust air of the room and / or the outside air. The secondary air-conditioning system designed as a convective system and / or radiation system contains a convective device and / or radiation device arranged in the space to be air-conditioned and a heat exchanging device through which a carrier medium flows. The heat exchanging device or a mechanical cooling device or cooling device with an evaporator and condenser system, which is connected via a refrigerant-containing lines with the heat exchanging device is or are arranged in the exhaust air stream of the primary air system.

By combining an air flow system with a convective system and / or radiation system, which are interconnected via a refrigerant, the efficiency of the ventilation system for bivalent air conditioning of the room is significantly increased, in particular by the proportion of primary air, which is used to transport the cooling power significantly is lowered, so that the primary air content alone can not dissipate the cooling load of the room to be air conditioned. The additional convective system or radiation system creates an additional cooling effect directly in the room and thus a cooling of the air. Page 2

Furthermore, independently controllable air flap systems can be provided on the suction side of the ventilation system that allow any mixing ratio of Zuluft- and exhaust air flow from the outside air and the exhaust air to perform conditioning tasks and thus ensure high efficiency and maximum safety, since the exhaust air - Or exhaust air flow, which flows through the condenser of the refrigerating device, can be added outside air even in exceptional temperature conditions.

Another feature of the known ventilation and air conditioning system is to arrange a preferably designed as a closed loop system heat recovery system in the exhaust air and supply air and a hot water heater for air heating in the supply air.

Object of the present invention is to increase the overall efficiency of a method and a ventilation system for air conditioning of a room of the type mentioned on.

This object is achieved by a method with the features of claim 1 and a ventilation system with the features of claim 1 1.

Through the combined use of a heat recovery system for the exchange of energy between the outside air or supply air and the exhaust air or exhaust air flow in conjunction with an adiabatic cooling of the exhaust air or exhaust air flow in the flow direction before the condenser of the refrigeration device, the overall efficiency of a ventilation system increased to such an extent that either the cooling capacity for cooling the inlet air flow directed into the room considerably increased or the volume flow of Zuluft- and exhaust air flow at constant cooling capacity of the refrigeration device and thus the size of the space ventilation system can be significantly reduced.

The solution according to the invention is based on the consideration that the use of a heat recovery system for energy saving in a ventilation system with a primary air system and a refrigeration device for additional Page 3

lent cooling of the directed into the room to be conditioned Zuluftstromes influence on the temperature level in the exhaust or exhaust air flow, as with the heat recovery system depending on the climatic conditions and conditions in the room to be air conditioned and the ambient climate of the room to be conditioned energy from the exhaust or exhaust air flow is transported to the outside air or supply air flow or vice versa from the outside air or supply air flow to the exhaust air or exhaust air flow. Especially when sorption rotors are used in a heat recovery system and in the summer months when the exhaust air temperature drawn from the room to be conditioned is below the outside air temperature of the environment of the room to be conditioned, sorption rotors transmit energy from the outside air supply air flow to the exhaust air exhaust air flow and thus increase it the air inlet temperature upstream of the condenser of the refrigeration device to a temperature value which is only slightly below the value of the outside air temperature. The reason for this lies in the high efficiency of approx. 80% of heat recovery sorption rotors, which is equivalent to 80% energy transfer from the outside air supply air flow to the exhaust air exhaust air flow.

The increase in the air inlet temperature in front of the condenser of the refrigerating device has a significant effect on the performance of the condenser and thus on the cooling performance of the cooling process for air conditioning of the room. In order to fulfill the cooling power required for this purpose and thus to ensure the operational reliability of the ventilation system, external air is additionally drawn in by bypass valves in the flow path of the supply air and exhaust air flow by means of the exhaust air fan controlled by the condensation pressure and thus an increased amount of air is promoted to increase the heat dissipation performance. However, this increase in the volume flow has considerable influence on the size of the ventilation system and the size of the exhaust fan and in particular its drive power and thus the energy costs of the ventilation system.

The energy advantage that results from the heat recovery, in particular with a heat recovery system with sorption, thus leading to disadvantages in the Entwärmungsprozess the ventilation system whose performance must be designed to ensure the reliability of large. page 4

By virtue of the adiabatic cooling of the exhaust air or exhaust air flow according to the invention immediately before the condenser of the refrigeration device, the total air volume flow is brought to a lower temperature level in an economical manner, which considerably increases the condenser capacity and thus the heat dissipation performance of the ventilation and air conditioning system.

Accordingly, the cooling of the supply air flow can be increased by means of the arranged in the supply air evaporator of the refrigeration device at constant Volumen- the Zuluft- and exhaust air flow depending on the degree of adiabatic cooling of the exhaust air or exhaust air flow by about 30 percent, i. the cooling capacity of the ventilation system can be increased without having to change their size to meet the cooling capacity.

Alternatively, the volume flow of Zuluft- and exhaust air flow at constant cooling capacity of the refrigeration device depending on the degree of adiabatic cooling of the exhaust air or exhaust air flow can be reduced by about 30 percent, i. for a given cooling capacity, the size and performance of the exhaust air fan and thus the size of the ventilation and air conditioning system can be reduced by reducing the volume flow of the supply air and exhaust air flow.

The outside air / supply air flow and the exhaust air / exhaust air flow preferably have opposite directions of flow.

Through the use of the countercurrent principle in the air flow system, a maximum efficiency of the heat recovery system, in particular when using a sorption rotor is achieved, which would have a lower efficiency when using the DC principle.

The adiabatic cooling of the exhaust air flow is preferably controlled as a function of the actual value of the outside air temperature and the desired value of the cooling power of the room to be conditioned, in particular the adiabatic cooling of the exhaust air flow at low outside air temperatures depending on the desired value of the cooling power of the room to be air-conditioned or off. page 5

A further embodiment of the method according to the invention consists in controlling the adiabatic cooling as a function of the condensation pressure measured in the condenser of the refrigeration device, in particular by switching the adiabatic cooling on and off.

Overall, the adiabatic cooling of the exhaust air or exhaust air flow immediately before the condenser of the refrigeration device increases the effectiveness or the efficiency of the condenser of the refrigeration device by increasing its Entwärmungsleistung, especially for power increase at peak loads. At low outdoor temperatures, which are associated with lower cooling load and lower drain load, the adiabatic cooling can then be switched on or off depending on the power.

A suitable for solving the above task air conditioning system for air conditioning a room with an air flow system that generates a directed into the environment of the room exhaust air flow and directed into the room supply air flow, consisting of an exhaust air flow of the room and / or an outside air flow or and having a refrigerating device including an evaporator and a condenser connected to at least one compressor via refrigerant lines is an exchanging heat recovery system by an energy between the exhaust / outgoing airflow and the outside air / supply airflow characterized in the exhaust air flow upstream of the condenser adiabatic cooling device.

The combination of a heat recovery system for energy exchange between the outside air or supply air and the exhaust air or exhaust air flow with an adiabatic cooling device of the exhaust air or exhaust air flow upstream of the condenser of the refrigeration device increases the overall efficiency of the ventilation system and allows either the Cooling power for cooling the directed into the room supply air flow without structural enlargement of the ventilation system to increase significantly or alternatively reduce the flow rate of Zuluft- and exhaust air flow at a constant cooling capacity of the refrigeration device and thus significantly reduce the size of the ventilation system. page 6

As an adiabatic cooling device, among other cooling towers could be used as indirect cooler for cooling and cooling systems. However, these have the disadvantage that, on the one hand, they can usually only be installed outdoors and, on the other hand, they have a dimension of the geometric shape which can not be accommodated within buildings. Alternatively, outboard, air cooled and water sprayed capacitors could be used, creating an adiabatic cooling effect and increasing the power of the air cooled capacitors. However, these have the disadvantage that the fins are contaminated in the condenser and that deposits of minerals from the spray water on the fins with the result of corrosion and encrustations on the fins occurs, which are associated with a reduction in performance and increased maintenance.

The adiabatic cooling device therefore preferably consists of an evaporation or contact humidifier, in particular of a mat humidifier.

Evaporative or contact humidifiers are based on the evaporation effect in which water evaporates from its surface into the surrounding air and wets it, the consumption of heat at the same time leads to cooling, so that this process due to its natural process requires no energy supply, i. Evaporative or contact humidifiers are based on the physical effect that the temperature on the enthalpy line in the Mollier-h-x diagram decreases with every evaporation of water.

In a further advantageous embodiment of the evaporation or contact humidifier can be connected directly to the capacitor of the refrigeration device and in particular connected to the capacitor of the refrigeration device to a structural unit.

For such a structural unit is particularly suitable as a mat humidifier designed evaporation or contact humidifier, which has a maximum evaporation surface with minimal volume and thus low air resistance and thus allows a very economical adiabatic refrigeration process. Page 7

While cooling towers and external, air-cooled and water-sprayed capacitors have the additional disadvantage that they emit highly germ-laden air as a result of the combination of heat and moisture, the combination of an evaporator or evaporator mounted directly in front of the condenser of a refrigeration device Contact humidifier by the fact that even with extremely high Legionellenkonzentrationen in dampening water and very high air flow speeds no legionella-containing aerosols are delivered to the airflow. This effect is essentially attributable to the fact that the humid and germ-laden air leaving the adiabatic cooling device or the evaporative or contact humidifier is dried in the condenser, so that even high concentrations of Legionella in the humidification water do not adversely affect the environment caused by the ventilation system lead discharged exhaust air.

In a further advantageous embodiment, the heat recovery system consists of a in the flow path of the outside air to the supply air and in the flow path of the exhaust air to the exhaust air arranged heat pipe, plate exchanger and / or heat recovery rotor, in particular from a sorption rotor.

By arranging a bypass arranged in the flow path of the outside air to the supply air in front of the heat recovery rotor and in the flow path of the exhaust air to the exhaust air behind the heat recovery rotor, which preferably consists of an independently controllable bypass flap system with one in the flow path of the outside air flow arranged to supply air flow outside air inlet flap, arranged in the flow path of the exhaust air flow to the exhaust air flow exhaust air damper and arranged between two flow paths and on both sides of the heat recovery rotor first and second bypass valves, is any mixing ratio of the supply air and exhaust air flow from the outside air and Exhaust air allows for the fulfillment of conditioning tasks and thus ensures high efficiency and maximum safety. Regarding the capacity of the capacitor independently controllable bypass damper system offers the significant advantage that even in exceptional temperature conditions, which may also exceed the normal case by chance, the exhaust air / exhaust air flow outside air can be mixed, creating at any time maximum reliability of the refrigeration device and thus the Ventilation system is guaranteed. page 8

Through the use of other air conditioning equipment in the room air conditioning system according to the invention is a further increase in the overall efficiency of the ventilation system and their adaptation to different task positions and climate conditions under optimal utilization of the energy supplied in the air conditioning of a room possible.

For example, the room ventilation system can also be used to optimize room heating by switching it as a heat pump and using it for both primary air heating and domestic water heating.

The heat exchanging device can be designed as a water heat exchanger, which is connected via a supply and return line with a convective and / or radiation device and preferably consists of a refrigerant / water heat exchanger, which via a refrigerant line with a compressor and a condenser arranged in the exhaust air stream and is connected via a flow and return line with the convective and / or radiation device.

By integrating further cooling units and systems in the air conditioner, the energy potential from the exhaust air / exhaust air can be used for higher, more economical condensation performance, so that further optimization of the operation and increase in the efficiency of the ventilation and air conditioning system is given.

An advantageous embodiment of the solution according to the invention is accordingly characterized by a two-circuited condenser whose first circuit connects a first refrigerant line connecting the condenser to a first compressor, a second refrigerant line connecting the first compressor to an evaporator arranged in the supply air flow and a third one Refrigerant line connecting the evaporator to the condenser. The second circuit of the dual-circuit capacitor includes a fourth refrigerant line connecting the condenser to a second compressor, a fifth refrigerant line connecting the second compressor to the heat exchanging device, and a sixth refrigerant line connecting the heat exchanging device to the condenser ,

A further advantageous embodiment of the solution according to the invention is characterized in that the heat exchanging device consists of a tube bundle evaporator, plate exchanger or direct evaporation system. These facilities Page 9

it is possible to optimally use the excess capacity of the condenser to produce chilled water. The otherwise customary separately installed unit for cold water production can be omitted without replacement, so that results in a very compact design, which considerably reduces investment and an economical operation also from an energetic point of view, because the available reserves in the exhaust air / Exhaust air can be used in an optimal way.

The air conditioning system can work as a heat pump in seasons where no cooling is required, according to an advantageous embodiment of the solution according to the invention, the capacitor and the evaporator formed as a register and its function can be switched, so that the evaporator to the condenser and the condenser becomes the evaporator and in this way the exhaust air flow energy is withdrawn to supply heat to the supply air.

Furthermore, there is the possibility that such a heat pump circuit is switched for the purpose of domestic water heating. In this case, the arranged in the exhaust air / exhaust air stream registers would work as an evaporator and deliver the exhaust air / exhaust air flow extracted energy via a refrigerant water heat exchanger for domestic water heating.

A further advantageous embodiment of the solution according to the invention is characterized in that a heat recovery system, preferably designed as a circulatory composite system, is arranged in the exhaust air and supply air stream.

Furthermore, a heater for air heating, in particular a hot water heater can be arranged in the supply air.

By adjusting the proportion of the air flow system and the convective and / or radiation system in the air conditioning of the room, the efficiency and efficiency of the ventilation system can be optimally adapted by adapting to the ambient and air conditioning conditions.

Reference to an embodiment shown in the drawing, the idea underlying the invention and other features and advantages of the inventive solution will be explained. Show it: Page 10

Figure 1 is a schematic longitudinal section through a ventilation system with an air flow system, a heat recovery system with a sorption rotor and an adiabatic cooling device and a plurality of cooling units and air treatment systems to optimize the efficiency of the ventilation system.

Fig. 2 is a Mollier-h-x diagram for humid air for a raumlufttechnische

Plant with a heat recovery system;

3 shows a schematic longitudinal section through the ventilation system according to FIG. 1 with state values of an exemplary selected climatic condition and

Fig. 4 is a Mollier-h-x diagram for humid air for a ventilation system with a heat recovery system and adiabatic

Cooling in front of the condenser of the refrigeration device.

1 shows a schematic longitudinal section through a ventilation system 1 for bivalent air conditioning of a room with an air flow system, a convective and / or radiation system 2, a heat recovery system 15, an adiabatic cooling device 16 in front of the condenser 1 1 of a cold generating device 10, 11, 14 and other air-conditioning devices 12, 13, 17, 18. The housing of the ventilation system 1 has a directed into the room to be conditioned supply air connection 5 and an exhaust port 4 and is connected to the environment of the room to be conditioned via an outside air connection 3 and an exhaust air connection 6 connected to which a designed as an external air flap 30 flap system and designed as a discharge air flap 60 flap system are arranged.

The ventilation system 1 forms an air flow system with a Bypassklap- pensystem 71 to 74 for the separation and adjustment of the air flows in the superposed chambers of the ventilation system 1 from. The air flow system has a supply air flow ZL directed into the space to be conditioned, an exhaust air flow AbL drawn off from the space to be air-conditioned, and an exhaust air flow AbL drawn off from the space to be conditioned. Page 11

outside air flow AL and a discharged to the environment exhaust air FL. The supply air flow ZL is generated by a supply air fan 9 and, depending on the position of the independently controllable Bypassklap- pen 71 to 74 composed of the outside air AL and a portion of the exhaust air AbL, while the exhaust air FL is generated by an exhaust air fan 8, the Exhaust air flow FL from the exhaust air AbL and the outside air AL composed. The room ventilation system 1 operates on the countercurrent principle, ie. H. the outside air flow AL and the supply air flow ZL run in opposite directions to the exhaust air flow AbL and the exhaust air flow FL.

In the flow path of the exhaust air AbL, a first filter 17 and in the flow path of the outside air AL, a second filter 18 is arranged. In both flow paths, a refrigeration device 10, 1 1, 14 is arranged, which consists of a arranged in the supply air ZL evaporator 10 and a arranged in the exhaust air FL multi-circuit capacitor 1 1 and at least one compressor 14, the or with the evaporator 10th and the condenser 1 1 are connected via refrigerant lines or is.

A heat recovery system 15 with a Soptionsrotor used for energy transfer from the exhaust air flow AbL and exhaust air FL to the outside air AL and supply air ZU or vice versa from the outside air AL and supply air ZU to the exhaust air AbL and exhaust air FL. In the flow direction of the exhaust air flow AbL before the sorption rotor 15, a first bypass flap 71 is arranged, which connects the exhaust air flow AbL with the supply air flow ZL and downstream of the sorption 15 in the flow direction of the exhaust air flow AbL second bypass flap 73, the outside air AL with the exhaust air FL combines. An exhaust air exhaust air flap 72 arranged in the exhaust air stream AbL, in conjunction with the second bypass flap 73, determines the proportions of the exhaust air AbL and the outside air AL, from which the exhaust air FL is assembled. An outdoor air inlet flap 74 arranged in the flow path of the outside air AL to the inlet air ZL, in conjunction with the second bypass flap 73, determines which portion of the outside air AL is guided through the sorption rotor 15 and in conjunction with the first bypass flap 71 from which proportion of the outside air AL and the exhaust air AbL the supply air ZL is composed. page 12

A third bypass flap 75 arranged in the flow path of the exhaust air flow FL immediately before the exhaust air flap 60 or in the flow path of the outside air AL directly behind the outside air flap 30 serves for filter deicing and device drying at low temperatures or high relative humidity of the outside air AL.

In the flow path of the exhaust air flow FL immediately in front of the multi-circuit condenser 1 1, an adiabatic cooling device 16 is arranged, which preferably consists of an evaporation or contact humidifier, in particular a Mattenbefeuchter.

On the suction side of the fans 8, 9 are further components for air treatment, such as a composed of the condenser 1 1, an evaporator 10 and at least one compressor 14 cold generating device for cooling the supply air ZL, a hot water heater 12 for supply air heating and a reheat heat exchanger 13 arranged, which is connected via refrigerant lines to the compressor 14 for heating the supply air ZL and the adjustment of the relative humidity of the air to be conditioned space supplied supply air ZL is used by drying the supply air ZL. In addition, a control cabinet 19 in one of the modules, in this case in the flow path of the exhaust air flow AbL, is provided as the control and switching device.

The superposed chambers for guiding the exhaust air flow AbL and exhaust air flow FL and the outside air flow AL and supply air flow ZL can alternatively be arranged side by side. The modules of the ventilation and air-conditioning system 1 can be assembled in any desired arrangement, with the exception of the adiabatic cooling device 16 to be arranged in the exhaust air flow FL immediately before the condenser 11 of the cold generating device 10, 11, 14.

The condenser 11 is designed as a two-circuit condenser and connected via a first refrigerant line to a first compressor 14 which is connected to the evaporator 10 via a second refrigerant line and this in turn via a third refrigerant line to the first circuit of the dual-circuited capacitor 11 ,

Via a fourth refrigerant line, the second circuit of the two-circuited condenser 11 is connected to a second compressor 14 and this via a fifth refrigerant line to a heat exchanging device 21, which is connected via a sixth refrigerant. Page 13

Is connected to the second circuit of the dual-circuit capacitor 1 1, so that this second circle is closed.

The heat-exchanging device 21 is part of a convective or radiation system 2, which has a convective or radiation device 22 which is arranged in the space to be air-conditioned. The heat exchanging device 21 consists for example of a refrigerant / water heat exchanger, which is connected via a cold or hot water supply and return line 23, 24 with the convective or radiation device 22 and is formed for example as a tube bundle or plate exchanger.

Alternatively, the convective and / or radiation system consists of a direct evaporator system, in which the convective and / or radiation device 22 is connected via the refrigerant supply line 23 to the at least one compressor 14 and via a refrigerant return line 24 to the two-circuited condenser 1 1. The two-circuit condenser 1 1 is connected via refrigerant pipelines to the at least one compressor 14 and the evaporator 10, which in turn is connected via a refrigerant piping to a terminal of the two-circuited capacitor 15. Furthermore, the at least one compressor 14 is connected via a refrigerant pipe to the one circuit of the two-circuited capacitor 11.

In connection with the preferably continuously variable delivery rate or rotational speed of the exhaust air fan 8 and the supply air fan 9, the composition of the exhaust air and supply air flow and their throughput depending on the required climatic conditions in the room to be air-conditioned, the outside temperatures and the pressure conditions in air conditioning room are set so that on the one hand, the conditioning tasks of the ventilation system 1 are met and on the other hand, a high efficiency and a high safety standard are guaranteed.

In particular, for the cooling of rooms where high heat loads incurred, by using the so-called. "Free cooling", that is, the utilization of possibly low outside air temperatures, and by optimal use of the convective and / or radiation system 2, an optimal mixing ratio both between the exhaust air discharged to be conditioned space AbL and the outside air supplied to the room AL and with respect to the cooling capacity of the primary air cooling on the one hand and the radiation and / or convection cooling on the other. Page 14

At higher outside temperatures, the exhaust air flow FL and / or the supply air flow ZL a higher proportion of exhaust air is added, so that the cooler exhaust air is optimally utilized.

By mixing outside air AL into the exhaust air flow FL, the condenser performance can be optimally utilized while maintaining a high safety standard, even in extraordinary temperature conditions. By increasing the speed of the exhaust air fan 8 whose air capacity can be changed so that a significantly higher volume flow of the exhaust air is set so that even when required high cooling capacity of the condenser 1 1 is operated safely, the Klappensys- tem by appropriate adjustment of the bypass valves 71 to 74 as much exhaust air from the room to be conditioned dissipates that constant pressure conditions are guaranteed in the room or building to be air conditioned and the airy extra power from the outside air and not from the exhaust air and discharged via the exhaust air fan 8 and the exhaust port 6 to the environment becomes.

The combination of a heat recovery system 15, in particular with a sorption rotor, and an adiabatic cooling device 16 in the air flow path immediately before the condenser 1 1 of the cold generating device 10 is essential for the optimization of the room air conditioning by means of the air conditioning system 1 shown schematically in FIG. 1 1, 14. The meaning of this combination will be described below with reference to the Mollier-hx diagrams shown in FIGS. 2 and 4 and of the schematic longitudinal section shown in Fig. 3 by the ventilation system with registered in the various chambers of the ventilation system 1 - State of the volume flows, the temperatures and the relative humidity of the air flows in the ventilation system 1 are explained.

In Fig. 2, the climatic conditions in a room ventilation system with a heat recovery system with a sorption rotor and bypass flaps in the outside air supply air flow or exhaust air exhaust air stream, but without adiabatic cooling device are shown in a Mollier-hx diagram. This diagram are as state values of the ventilation system, an evaporation temperature of 8 ° C, a condensation temperature of 53 ° C, an exhaust air temperature of 24 ° C, a mixed air temperature from the exhaust air to the sorption with additionally admixed outside air of 30.1 ⁰ C and a temperature of 48.1 ⁰ C after exiting from the condenser of the refrigerating device basis. Page 15

The diagram shown in Fig. 2 it can be seen that starting from an exhaust air temperature of the room to be conditioned of 24 ° C at point 1, a heating of the exhaust air by means of the sorption rotor to 30.1 ⁰ C at a capacity of 10,000 m ³ / h of the Sorption rotor to point 2 takes place. By mixing outside air with a temperature of 31 ⁰ C at a relative humidity of 73% (point 3) to the exhaust air in the ratio of 10,000 m ³ / h to 13,000 m ³ / h, the point 4 with a mixed air temperature of 30.1 ⁰ C is set. For the Entwärmungsleistung of the capacitor 1 1 at an air outlet temperature of the capacitor 1 1 of 48.1 ⁰ C is thus an energy difference of Δ h = 18 ° C available. For recooling, a total volume flow of 10,000 m ³ / h from the exhaust air plus 13,000 m ³ / h from the outside air, ie a total volume flow of 23,000 m ³ / h, is required.

When using an adiabatic cooling of the exhaust air and exhaust air stream in front of the condenser 1 1 of the refrigerating device 10, 1 1, 14 are in Figs. 3 and 4 in a schematic longitudinal section through the ventilation system with in the various modules of the air conditioning system entered state values of the volume flows, the temperatures and the relative humidity of the air flows and a Mollier-hx diagram for humid air represented conditions on the basis of the previously assumed state values of the ventilation system 1 for the evaporation temperature of 8 ° C, condensation temperature of 53 ° C, exhaust air temperature of 24 ° C, mixed air temperature from the exhaust air to the sorption rotor with additionally admixed outside air of 30.1 ⁰ C and the temperature of 48.1 ⁰ C after exiting the condenser.

Starting from an exhaust air temperature of 24 ° C in point 1 of the Mollier-hx diagram of FIG. 4, a temperature of 29.5 ° C in the exhaust air exhaust air stream at point 2 is achieved by means of the sorption rotor used in the heat recovery system 15 at the output of the heat recovery system 15 , By mixing outside air AL with a temperature of 31 ⁰ C (point 3) to the exhaust air AbL in a ratio of 10,000 m ³ / h to 7,000 m ³ / h, the point 3 is reached with a mixed air temperature of 30.1 ⁰ C, which means synonymous with the temperature before entry into the adiabatic cooling device 16. This causes a reduction of the temperature to about 23 ° C with an increase in enthalpy by about 2 g / kg at point 4, where the temperature after exiting the adiabatic Page 16

Cooling device 16 of the temperature before entering the condenser 1 1 of the refrigerating device 10, 1 1, 14 corresponds.

Until reaching a temperature of 48.1 ⁰ C at the output of the condenser 1 1 of the refrigeration device 10, 1 1, 14 at point 5 is thus a temperature difference of 25, 1 ° C available. A comparison of the Mollier-hx diagram shown in FIG. 2 for a ventilation system with a heat recovery system without adiabatic cooling with the Mollier-hx diagram shown in Fig. 4 for a ventilation system with a heat recovery system and an adiabatic cooling of the exhaust air -Fortluftstromes shows that the cooling effect of the adiabatic cooling of the exhaust air exhaust air flow is greater than the heat transfer from the heat recovery system 15, since the inlet temperature at the inlet of the condenser 1 1 of the refrigeration device 10, 1 1, 14 by 1 ° C below the Exhaust air temperature of 24 ° C when using the air conditioning system without adiabatic cooling, wherein in the arrangement of the ventilation system with adiabatic cooling, the heating of the exhaust air exhaust air flow through the engine of the exhaust fan 8 is already considered or compensated.

Overall, in a method with combined use of a heat recovery system 15 and an adiabatic cooling device 16 in the exhaust air exhaust air stream in front of the condenser 1 1 of the refrigerating device 10, 1 1, 14 for the Entwär- tion an energy difference of Δ h = 25 ° C versus an energy difference of Δ h =

18 ° C in a ventilation system with a heat recovery system without adiabatic cooling device in front of the condenser of 1 1 of the refrigeration device available.

As can also be seen from the above comparison, the additional amount of air from the outside air when using an adiabatic cooling device 16 before the condenser 1 1 of the refrigerating device 10, 1 1, 14 of 13,000 m ³ / h reduced to 7,000 m ³ / h So that the ventilation and air conditioning system with a total volume flow of 17,000 m ³ / h can be cooled, that is, compared to a room ventilation system with heat recovery system without adiabatic cooling thus a reduction of the total volume flow by 6,000 m ³ / h is possible. Page 17

Alternatively, while maintaining the at a room ventilation system with heat recovery system without adiabatic cooling of the exhaust air exhaust air flow before the condenser 1 1 of the refrigeration device 10, 1 1, 14 required total volume flow of 23,000 m ³ / h greater cooling capacity by about 30% be generated so that the ventilation system can be used without changing their size for a corresponding Entwärmungsleistung a room to be air conditioned.

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LIST OF REFERENCE NUMBERS

1 room ventilation system

2 convective and / or radiation system

3 outside air connection

4 exhaust connection

5 supply air connection

6 exhaust air connection

8 exhaust air fan

9 Supply air fan

10 evaporators

1 1 capacitor

12 water heaters

13 Reheat heat exchanger

14 compressor

15 heat recovery system

16 adiabatic cooling device

17 first filter

18 second filter

19 control cabinet

21 heat exchanging device

22 convective or radiation device

23 Refrigerant flow line

24 Refrigerant return line 30 Outdoor air damper

60 exhaust air flap

71 first bypass flap

72 Exhaust air exhaust damper

73 second bypass flap

74 Outdoor air supply damper

75 third bypass damper AL outdoor airflow AbL exhaust airflow

FL exhaust air flow Page 19

ZL supply air flow

Claims

Page 20Patent claims

A method for air conditioning a room with an air flow system, the one leading out of the room exhaust air flow (AbL), one to the environment of the

Room discharged exhaust air flow (FL), a sucked from the environment of the room outside air flow (AL) and directed into the room supply air flow (ZL), which additionally arranged by means of a supply air flow (ZL), via refrigerant lines and at least one compressor (14) with a in the exhaust air Ström (FL) arranged capacitor (1 1) connected to the evaporator (10) of a

Refrigeration generating device (10, 1 1, 14) can be cooled,

characterized,

that with a heat recovery system (15) energy between the outside air flow (AbL) or supply air flow (ZL) and the exhaust air flow (AbL) or exhaust air flow (FL) exchanged and the exhaust air flow (AbL) or exhaust air flow (FL) in the flow direction in front of the condenser (1 1 ) of the refrigeration device (10, 1 1, 14) is adiabatically cooled.

2. The method according to claim 1, characterized by a bypass (71 - 74) through which a part of the outside air flow (AL) in the exhaust air flow (AbL) or exhaust air flow (FL) is derived.

3. The method according to claim 1 or 2, characterized in that the cooling of the supply air flow (ZL) by means of the inlet air flow (ZL) arranged evaporator (10) of the refrigeration device (10, 1 1, 14) at constant flow rate of the supply air flow ( ZL) and exhaust air flow (FL) is increased as a function of the degree of adiabatic cooling of the exhaust air flow (AbL) or exhaust air flow (FL).

4. The method according to claim 3, characterized in that the cooling of the supply air flow (ZL) by means of the supply air flow (ZL) arranged evaporator (10) of the Page 21

Refrigeration generating device (10, 1 1, 14) at constant flow rate of the supply air flow (ZL) and exhaust air flow (FL) depending on the degree of adiaba- th cooling of the exhaust air flow (AbL) or exhaust air flow (FL) is increased by about 30 percent ,

5. The method according to claim 1 or 2, characterized in that the volume flow of the supply air flow (ZL) and exhaust air flow (FL) at a constant cooling capacity of the refrigeration device (10, 1 1, 14) in dependence on the degree of adiabatic cooling of the exhaust air flow (AbL) or exhaust air flow (FL) is reduced.

6. The method according to claim 5, characterized in that the volume flow of the supply air flow (ZL) and exhaust air flow (FL) at constant cooling capacity of the refrigerant te generating means (10, 1 1, 14) in dependence on the degree of adiabatic cooling of the exhaust air flow (AbL) or exhaust air flow (FL) is reduced by about 30 percent.

7. The method according to at least one of the preceding claims, characterized by opposite flow directions of the outside air / supply air flow (AL, ZL) and the exhaust air / exhaust air flow (AbL, FL).

8. The method according to at least one of the preceding claims, characterized in that the adiabatic cooling of the exhaust air flow (FL) is controlled in dependence on the actual value of the outside air temperature and the desired value of the cooling power of the room to be conditioned.

9. The method according to claim 8, characterized in that the adiabatic cooling of the exhaust air flow (FL) is switched on or off at low outside air temperatures as a function of the desired value of the cooling power of the room to be air-conditioned. Page 22

10. The method according to claim 8 or 9, characterized in that the adiabatic cooling in dependence on the condensation pressure in the condenser (1 1) of the refrigerating device (10, 1 1, 14) is controlled.

1 1. Air conditioning system for air conditioning a room with an air flow system that generates a directed into the vicinity of the room exhaust air flow (FL) and a directed into the room supply air flow (ZL), which consists of a

Exhaust air flow (AbL) of the room and / or an outside air flow (AL) consist or are composed, and with a refrigeration device (10, 1 1, 14) containing an evaporator (10) and a condenser (1 1), the are connected via refrigerant lines to at least one compressor (14),

marked by

an energy between the exhaust air / exhaust air flow (AbL, FL) and the fresh air / Zuluftstrom (AL, ZL) exchanging heat recovery system (15) and in the exhaust air flow (FL) in the flow direction in front of the condenser (1 1) arranged adiabatic cooling device (16 ).

12. Ventilation system according to claim 1 1, characterized in that the adiabatic cooling device (16) consists of an evaporation or contact humidifier.

13. Ventilation system according to claim 1 1 or 12, characterized in that the evaporation or contact humidifier directly with the capacitor

(1 1) of the cold generating device (10, 1 1, 14) is connected. Page 23

14. Ventilation system according to one of claims 1 1 to 13, characterized in that the heat recovery system (15) arranged in the flow path of the outside air (AL) to the supply air (ZL) and in the flow path of the exhaust air (AbL) to the exhaust air (FL) Heat pipe, plate exchanger and / or heat recovery rotor consists.

15. Ventilation system according to claim 14, characterized in that the heat recovery rotor (15) consists of a sorption rotor.

16. Air conditioning system according to one of the preceding claims 1 1 to 15, characterized by a in the flow path of the outside air (AL) to the supply air (ZL) before the heat recovery rotor (15) and in the flow path of the exhaust air (AbL) to the exhaust air (FL) behind the heat recovery rotor (15) arranged bypass (71 - 74).

17. Ventilation system according to claim 16, characterized in that the bypass (71-74) consists of one of an independently controllable by-pass flap system with a in the flow path of the outside air flow (AL) for

Supply air flow (ZL) arranged outside air supply air flap (74), a in the flow path of the exhaust air flow (AbL) to the exhaust air flow (FL) arranged exhaust air exhaust air damper

(72) and on both sides of the heat recovery rotor (15) arranged first and second bypass flaps (71, 73).

18. Air conditioning system according to one of the preceding claims 1 1 to 17, characterized in that the heat exchanging device consists of a water heat exchanger (21), which via a supply and return line (25,

26) is connected to the convective and / or radiation device (22). Page 24

19. Air conditioning system according to one of the preceding claims 1 1 to 17, characterized in that the heat exchanging device consists of a refrigerant / water heat exchanger (21) via a refrigerant line (31 to 39) with a compressor (17, 18) and a condenser (15, 16) arranged in the exhaust air stream (60) and via a supply and return line (23, 24) to the convective and / or radiation device (22).

20. Ventilation system according to claim 18 or 19, characterized in that the heat exchanging device (21) in the exhaust air stream (60) is arranged.

21. Air conditioning system according to at least one of the preceding claims 1 1 to 20, characterized by a two-circuit capacitor (15) whose first circuit of a first refrigerant line (31) which connects the condenser (15) with a first compressor (17), a second refrigerant line (32) which connects the compressor (17) with an evaporator (19) arranged in the supply air flow (70) and a third refrigerant line (33) which connects the evaporator (19) to the condenser (15) and a A second refrigerant circuit (34), which connects the condenser (15) to a second compressor (18), a fifth refrigerant line (35), the second compressor (18) with the heat exchanging device (21 ) and a sixth refrigerant line (36) connecting the heat exchanging means (21) to the condenser (15).

22. Air conditioning system according to at least one of the preceding claims, characterized in that the heat exchanging device (21) consists of a tube bundle evaporator, plate exchanger or a Direktverdampfungs- system. Page 25

23. Ventilation system according to claim 22, characterized in that a preferably designed as a circulatory system heat recovery system (12 to 14) in the exhaust air and supply air stream (60, 70) is arranged.

24. Ventilation system according to at least one of the preceding claims, characterized in that the condenser (15) and the evaporator (19) formed as a register and are switchable in their function and that for the operation of the air conditioning system as a heat pump in the exhaust air / Exhaust air stream (60) arranged register acts as an evaporator and the exhaust air / exhaust air stream (60) withdrawn energy via a refrigerant water heat exchanger for domestic water heating.

25. Ventilation system according to at least one of the preceding claims, characterized in that a heater for air heating, in particular a hot water heater (40), in the supply air flow (70) is arranged.