Air-conditioning and climate-control technology

Transcription

1 Air-conditioning and climate-control technology We create a good indoor climate.

2 AIR CONDITIONING with renewable energy efficient + renewable = sustainable Thermal-powered air conditioning is one option for the sustainable use of available energy resources. In this connection comfortable air conditioning (cooling + dehumidifying of air) is achieved using heat as the operating energy. Heat sources are solar thermal plants, district heat networks or waste heat (e. g. combined heat and power plants, waste heat from industrial processes). The energyefficient use of all available technologies is increased even more by the central air conditioning unit Sorpsolair. Dehumidification by absorption The outside air is dehumidified in an absorption process with a liquid concentrated brine. The water contained in the air is bonded by a lithium chloride solution. In a separate process the saturated brine is regenerated by means of external heat sources. Cooling of the supply air is carried out by the downstream adiabatic evaporative cooling. Loss-free storage of energy The technology offers the possibility to store heat in a liquid medium virtually without loss and for a virtually unlimited period of time. This stored heat is available for use particularly in the case of a discontinuous heat supply (e. g. if there is only intermittent solar radiation on the collector array). Favourable heat sources Ideal sources of energy are solar thermal systems because the collector arrays are designed such that they provide the desired heat output during transitional periods, if the sky is overcast and the ambient temperatures are low. Hot summer days require concepts to dissipate the excess energy. This can be reasonably used for air conditioning. Low regeneration temperatures are a prerequisite for district heat, because the operators often operate their networks with lowered temperatures in summer. Waste heat from industrial processes or combined heat and power plants is also a very suitable source. Menerga fields of application: Museums / galeries Low-energy buildings Theaters Historical buildings Sports grounds Public swimming pool halls Private swimming pool halls Hotels / restaurants Schools / universities Hospitals Shopping centers Offices / commercial buildings Banks Industry Data centers 2 Adiabatic evaporative cooling Heat recovery Heating Cooling Free cooling

3 Tough practice conditions The process has already proven its high capacity in dehumidification. In Freiburg, for example, which belongs to those regions in Germany with the highest air humidity with its many hot and humid summer days, several systems are operating successfully. Further projects are under way. We would be happy to provide further details on request. BENEFITS Different heat sources may be used, for example district heat Low operating costs as a result of efficient heat recovery and outstanding maintenance concepts Storage of heat energy without losses Low regeneration temperatures of about C Cooling without a mechanical refrigerating machine Reduction of the CO 2 output required for air conditioning Representatives, sales and service throughout Europe from a single source Energy-efficient operating concepts lead to very low energy costs Air conditioning without summertime peak load of electrical energy consumption Constant heat requirement throughout the year Thermally-driven cooling with COP > 1 Return Air Concentrated brine Warm and humid outside air Absorber Warm and dry outside air Verdunstungs- Evaporative cooling Kühlung Dry cool supply air Diluted brine Exhaust Air Outside Inside / room Sorption Control and adjustment 3

4 inhaus in Duisburg, Germany, project of the Fraunhofer Institute ZentrumZukunft of the EWE AG in Emstek, Germany Sorpsolair Type 72 with double recuperator, adiabatic evaporative cooling and sorptive dehumidification Production at Menerga at the plant in Muelheim an der Ruhr, Germany 4

5 That s how it works: Winter operation Ventilation in exhaust air-outside air mode with heat recovery from the return air. Free cooling In summer mode or in the case of excess temperature, the volume of air is increased as a result of the bypass connection. Free cooling without heat recovery. AB ZU Summer mode Ventilation with adiabatic evaporative cooling in summer mode. Summer mode in the case of high outside air humidity If the outside air exceeds the humidity limit, it is dehumidified in the absorber. The released absorption heat is cooled down to the necessary supply air temperature by the adiabatic evaporative cooling. Summer mode with generation of the brine To regenerate the brine that is diluted by the humidity taken up from the outside air, the heated brine circulates in the desorber. The water vapour released from the brine is taken up by a small separate outside air flow and dissipated into the exhaust air. Now, the regenerated brine is able to absorb humidity again from the outside air. return air, outside air, supply air, exhaust air 5

6 Details which are right every time! Regeneration temperatures Low temperatures of 55 to 70 C are particularly advantageous for sorption-based air conditioning because they are sufficient for the brine regeneration. In addition, the timing of regeneration is independent of the absorption. The brines are deposited in simple plastic containers. Their regeneration occurs at the time when there is heat available for it. Fan unit The fan units controlled by frequency converters ensure optimum operation. At the same time, safety is a priority. Permanent monitoring of vibrations, number of revolutions, flows and tensions are a matter of course. Complete solutions with control and measurement technology As is the case for all air conditioning units, Menerga delivers a complete and customertailored solution. We deliver a central air conditioning unit ready to plug in with integrated control for easy connection to the building control system. Tanks, pipings and measurement technology for the brine handling are also part of the service. 6

7 Munich Airport, Germany Solar Info Center in Freiburg, Germany Data You will Need! unit Unit types 72 / 73 Sorpsolair Nominal volume flow rate / 1) m 3 / h 2,900 3,500 4,700 6,100 8,300 10,500 12,700 14,900 Regeneration flow rate / m 3 / h 1,000 1,150 1,550 2,050 2,800 3,500 4,250 5,000 Temperature efficiency 2) % Cooling performance 3) kw Propotion of this which is sensible cooling performance kw Dehumidification capacity kg/h Heating power brine regeneration 4) kw Dimensions 5) Length mm 6,260 6,260 6,420 7,470 7,470 7,790 8,110 8,430 Width mm 890 1,050 1,370 1,050 1,370 1,690 2,010 2,330 Height mm 2,170 2,170 2,170 2,490 2,490 2,580 2,580 2,580 Dimensions of brine tank 6) Length mm 4,180 4,180 4,180 4,180 4,500 4,500 5,460 5,460 Width mm 1,050 1,050 1,050 1,050 1,050 1,050 1,050 1,050 Height mm 2,010 2,010 2,010 2,010 2,330 2,330 2,330 2,330 1) Diverging air capacity if requested 2) Winter operation 3) For 26 C; 45 % r.h. and 32 C; 40 % r.h. 4) FL/RN = 70 / 60 C 5) Solid measure; observe ventilation duct connection and electric control cabinet 6) Dimensions only apply to the unit types 73 7

8 Menerga GmbH Gutenbergstraße Muelheim an der Ruhr Germany Phone Fax For web links to the distribution centers in your area please see Menerga is represented throughout Europe WBD00045 Sorpsolair Type 72 & 73 Subject to technical modifications 12/2010 Cover photo: Shutterstock / Kulish Viktoriia