DESCRIPTION

FIELD OF INVENTION

Present invention relates to a heat exchanging device for air conditioning using indirect and direct adiabatic cooling.

BACKGROUND AND PRIOR ART

In building ventilation systems there is a demand to cool fresh air which is then supplied to the room. Beside covering ventilation losses, systems should also cover heat gained from different machines inside buildings (computers, servers, etc.). There are many solutions provided in the state of the art which are all based on several steps: heat recovery, cooling wherein the energy needed for cooling air is gained form systems which are based on refrigerant system and use of the electrical power (chillers, condensing units and similar). One of the examples of conventional systems used are disclosed in WO87/01188 which describes the apparatus for indirect, evaporative cooling of an air current, including a contact body made up in layers, with duct systems between layers. There are two separate duct systems, useful air for cooling passing through one system, while a cooling air current passes through the other system. Cooling takes place by evaporation of water in the other duct system. Another example is described in KR20090019326 A which discloses an indirect evaporative cooling machine and a regenerative evaporative cooling machine using the same which improves the performance of the regenerative evaporative cooling machine by resolving the ununiformity of air flow caused by contact between the air and water by making the flow rate of air uniform.

Furthermore, conventional system that incorporates method that uses a secondary air flow to cool primary air flow (DE4441066 Al). The secondary air flow is humidity charged during humidifying, at least up to the saturation line of 100 percent relative air humidity. The concept has been further evolved in WO 2004085946 Al wherein indirect adiabatic cooling is used and which discloses heat exchanger for exchanging heat between a first air stream and second air stream comprising plurality of plates limiting exchange chambers which are serially arranged in a transversal direction with respect to the plates. According to the characteristics, WO 2004085946 Al represents the closest prior art related to the invention but unlike present invention does not use direct adiabatic cooling. All these conventional systems experience several problems that could be summarized as follows: low energy efficiency, require cooling media comprising refrigerants with high Global Warming Potential (GWP) and therefore environmentally unfriendly and very high costs of maintenance due to the complexity of the system.

The purpose of this invention is to provide the climate control system that would be able to overcome drawbacks of the conventional systems known in the art.

Another object of this invention is to provide an option to be used during cold season enabling humidification of the incoming airstream.

SUMMARY OF THE INVENTION

The invention relates to a heat exchanging device for air conditioning using indirect and direct adiabatic cooling. To increase efficiency of cooling in summer period system with pump M and nozzles (SI, S2) in section of heat exchanger is installed. Pump is circulating water over the installed piping system to nozzles SI and S2. Water is sprayed into airstream FI, and in this way is adiabatically cooled which results in better indirect adiabatic cooling of airstream F2. In order to increase cooling of airstream even more, F2 system of nozzles S3 is connected to pump system, and is directly cooling airstream F2 with adiabatic process. Optionally, system allows installation of the three way valve on pump system for use during cold season, which results in desirable humidification of airstream F2.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 Schematic drawing of the climate system with indirect and direct adiabatic cooling. DETAILED DESCRIPTION OF THE INVENTION

This invention relates to the heat exchanging device for air conditioning using indirect and direct adiabatic cooling shown in Figure 1, more specifically to the heat exchanging device comprising: plurality of plates for exchanging heat between two airstreams (FI and F2); wherein airstream F2 from outdoor is cooled over plates with cooler airstream FI from indoor area and Pump (M) which is designed to circulate water over the piping system to nozzles (SI and S2) and the water is sprayed into airstream FI which causes indirect adiabatic cooling of airstream F2 and system of nozzles (S3) is connected to pump (M) which is directly cooling airstream F2 adiabatically.

Optionally, system allows installation of the three way valve on pump system for use during cold season, which closes nozzles SI and S2 and opens system of nozzles S3 and results in desirable humidification of airstream F2. By making use of climate control device according to present invention, following advantages over prior art and conventional systems up to date are obtained: Considerably higher energetic efficiency (consumption of electrical consumption is 20 times lower, p.e. 1,5 kW for indirect and direct adiabatic cooling versus 50 kW for standard chiller)

More environmentally friendly cooling media is used (only cooling media used for adiabatic cooling is water)

The use of climate control device in practice confirmed the above mentioned performances and proved to be fully compliant with current regulations which exclude the use of chillers with low efficient parts (compressors, fans etc.), and also regulations aiming to save environment which also exclude usage of refrigerants with high Global Warming Potential.