Econet Marketing Brochure 8692 Gb 2008 08


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Marketing broschure of Econet - innovative heat exchanging solution by Flakt Woods.

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Econet Marketing Brochure 8692 Gb 2008 08

  1. 1. Econet Where renewable and recoverable energy combine Saving Energy, Economy and Environment with Fläkt Woods
  2. 2. Our innovative Econet system is saving energy in several ways T he components in Fläkt Woods’ inno- vative Econet system are connected to- gether to provide a more reliable and more This is highly beneficial from an environmen- tal point of view because much less energy is used to transport the air through unneces- efficient AHU system. Heat recovery, heating sary components. Further development of the and cooling are integrated into a common cir- principle of energy recovery has also led to cuit as heating/cooling coils, pumps, valves, increases in efficiency of 50% compared with pipe systems, insulation, etc. The result is a traditional coil recovery systems. shorter and more compact ventilation unit. News Dry-box solution (accessory) Twin pump solution (accessory) High moisture combined with impurities in the A twin pump solution is available for Econet. This outdoor air can sometimes damage the outdoor is the optimal solution for buildings where the air filter. To protect the outdoor air filter, the pre- ventilation is crucial for an ongoing process and heater coil has traditionally been installed before Econet must never stop. If one of the pumps has the filter. This traditional solution reduces the a breakdown, the twin pump solution sets the energy recovery by 30%. Therefore, with Econet other pump going. dry-box solution both coils are connected in the supply air instead. Advantages of this system are that there is no impairment of the recovery, Heat exchanger package the system is self-regulating and the compo- (accessory) nents are protected from failure with the help of In most cases some form of supplementary Econet’s frost protection. heating or cooling is necessary. Instead of or- dering cooling/heat exchanger separately, Fläkt Controls Woods offer a complete heating exchanger The control unit for Econet’s recovery function package. This means that shorter delivery times has been updated and has been given more flex- are possible, and better precision is achieved in ibility and better functionality. The control unit the building. can also be supplemented with its own efficien- cy/energy measurement function.
  3. 3. Problem: Energy consumtions in buildings We spend approximately 90% of our time heating and cooling through the ventilation indoors. A lot of energy resources are con- system we have a lot to work with. Together sumed to maintain the right temperature that means that you can make an impact on and air quality, which is becoming more and somewhere about half of the total energy more important. On average, 68% of a build- consumption of a building when focusing on ings energy needs are spent on heating, cool- ventilation. That is something worth consid- ing and ventilation. Since we can affect both ering! Solution: Energy efficient systems Reusing energy An obvious energy approach is to reuse the were previously unusable can be used in the heat and cooling. This mostly applies to reuse Econet system. of excisting energy in the exhaust air. It is best An example of system optimization is to com- achieved by using a recovery system with the bine Econet with a chiller. The temperature of highest recovery rate. Econet has a recovery the cooling water is usually determined with rate of 65 -75%. reference to the requirement of the ventila- tion unit, which leads to a relatively low cooling System optimization water temperature (6ºC). This means that the Through its intelligent design, Econet is able to efficiency of the chiller is limited. If an Econet influence the entire energy chain. Thanks to the system is used instead, the cooling water tem- high degree of efficiency, the energy require- perature can be increased significantly. This ment can be reduced steeply. The entire energy leads to a more efficient and smaller chiller, chain from production, distribution to consump- smaller pipe dimensions and pumps, i.e. econo- tion can be optimized with the help of Econet, mies in both investment costs and operating thanks to the fact that energy sources that costs are possible. LCC sums it all up SAVINGS Within the industry we use an analysis ap- COSTS proach called “Life Cycle Cost“ when design- ing ventilation systems. It balances the cost of better components and smarter system con- trol with savings in maintenance and energy costs over the system’s life time. Not surprisingly, a more expensive system with better quality will be the cheapest solu- tion in the long run as savings are made in energy and maintenance. TIME
  4. 4. Heating Cooling The design temperature in a heating system is traditionally Econet can cool a building with other water temperatures 80/60°C. Econet is a low-temperature system, which means that traditional systems. About 10ºC cooling water is in that it is possible to use heating water at a temperature of most cases sufficient as a feed temperature, whereas the 25-35ºC. This means that there is a possibility of utilizing hot return temperature of the cooling water can be as high as water that was previously considered to be unusable. The 22-26ºC. If a chiller is used, the cooling factor (COP) is in- heat source for Econet can be the return water from district creased as a consequence of a better working point. Econet heating, waste/condenser heat or return water from radiator is always prepared for cooling, which makes it possible to systems, for example. add cooling in a later stage.
  5. 5. Econet makes everybody a winner To lower the costs and care for the environment, Econet makes it possi- ble to use alternate energy sources instead of traditional. Thanks to this, Econet makes everybody a winner. Heat energy from a chiller Heat pump Refrigerators give off heat (condenser heat) The lower the hot water temperature pro- when they produce cold. Liquid-borne con- duced by a heat pump, the better the operat- denser heat from chillers is very often at a ing economy. Econet can significantly lower low temperature (30-36ºC), which in the past the hot water temperature down to a level has meant that it cannot be used and thus of approximately 30ºC. This means that we goes to waste. Econet can utilize the waste have a more efficient and smaller heat pump heat in order to heat the supply air. This way with better operating economy. of saving energy is efficient in food shops and supermarkets. Energy from district heating +23 °C Econet can utilize lower hot water tempera- tures, which makes it entirely possible to 18 °C utilize the return heating water from the 27 °C >30 ° C radiator system, for example. This means that the return heating water to the district heating network can be lowered to 20-25ºC -5 °C +20 °C in optimal cases, which results in reduced energy costs. Energy from district cooling Energy from ground source cooling/ In a district cooling system, it is important seawater that the temperature of the return water The temperature in the ground is largely to the district cooling system is as high as constant (8-10ºC), i.e. it is more or less possible. In an Econet system, the highly unaffected by the season. The temperature efficient coils can return the desired tem- can rise slightly during the late autumn, perature level to the cooling water without however, and this can lead to problems in over dimensioning the cooling coil in the making use of the ground source cool- ventilation unit as in traditional systems. ing. Econet can utilize temperatures of up to 12ºC, which means that the system is excellent for these environmentally friendly energy sources. Evaporative cooling 29°C 19°C 24°C The exhaust air unit can be supplemented with a humidifier section where cooling recovery is desired, and indirect evapora- 22°C 11°C < 10 °C tive cooling can be utilized in this way. This method can significantly reduce the cooling effect requirement from the chiller, which 32°C 16°C results in a smaller chiller and lower operat- ing costs.
  6. 6. Over 1000 Econet systems installed Econet in superstores Econet in industries The regrigerated counters emit waste heat Within industry there is usually waste heat that Econet can reuse. This energy is often available. This heat is frequently sufficient for wasted, but Econet uses it to heat the supply Econet to heat the air, i.e. no primary heating air. is required to heat the air. Due to the recovery principle employed by Econet it is possible to References: ICA Maxi, Jönköping, Haninge, position the units separately from each other, Sweden/Prisma, Turku, Finland in addition there is no transfer of contaminated exhaust air. Reference: Volvo, Gothenburg, Sweden Econet in offices and commercial Econet in hospitals Buildings In hospitals it is of severe importance that The ventilation requirements in these types of there is no leakage flow between supply- and buildings vary during a day. Econet combined exhaust air in order to keep the indoor air with a VAV system creates a demand control- hygienic. For the same reason, the ventilation led ventilation, which gives a high comfort but units also have to be easy to maintain. That is saves energy when the rooms are empty. Coil why only indirect energy recovery can be used, recovery in Econet garantees no leakage flow i.e coils. As the ventilation is in use day and between supply and exhaust air and decreases night reuse of energy is important in order to the length of the unit. These buildings often decrease the energy costs. Econet is the best have access to ground source heating/cooling, option for that. and that makes Econet a perfect solution. References: Akademiska Hus, Lund, Uppsala, References: TYKS, Turku, Finland/St. Olav Gothenburg, Sweden/Frankfurt Airport, Frank- Hospital, Trondheim, Norway/Imperial College, furt, Germany/NATO, Brussels, Belgium/Bris- London, UK/Jansson Pharmacia, Antwerpen, tol Museum, Bristol, UK Belgium
  7. 7. Increasing energy prices, legislation and a more environ- mental consideration raise the demands and old tech- niques are challenged with innovative solutions. Our Econet system contains of an air handling unit and a prefabricated pump group that con- trols the system. A heating exchanger package can be delivered as an accessory. The winning ideas of Econet - One common circuit for heating supply, - Perfect for renewable energy sources cooling and heat recovery results in a di- such as ground source water for cooling minished need of circulation pumps, pipe and waste energy for heating. systems, valves, insulation etc. The result is a shorter unit and in most cases less - The possibility of utilizing cooling recov- pressure loss. ery reduces the cooling effect requirement and evaporating cooling agent - A flexible control system that optimizes the reuse of energy. - Freeze-proof system - High recovery rate, especially suited for - Separate air flows provide no air trans- variable air velocity systems. fer. - Exceptionally low temperature require- - Our Dry-box solution protects the supply ment for hot water, allows the utilisation of air filter without having a negative impact alternative sources of thermal energy. on the recovery. - Ideal for district cooling/heating.
  8. 8. Fläkt Woods Group Brings Air to Life Fläkt Woods is a global company providing solutions for ventilation and air climate for buildings as well as fan solutions for Industry and Infrastructure applications. Fläkt Woods Group has 20 manufacturing/engineering opertions worldwide, sales offices in 30 countries and representation in 95 countries. Head offices Buildings Air Climate Industry Air Movement Fläkt Woods AB Fläkt Woods Kung Hans väg 12 Axial Way SE-192 68 SOLLENTUNA Sweden COLCHESTER, CO4 5ZD t +46 8 626 49 00 United Kingdom f +46 8 626 73 10 t +44 1206 222 555 f +44 1206 222 777 Sales Offices available World Wide – See our website for details. FWG-Econet-GB-200806-8692 © Copyright 2008 Fläkt Woods Group Due to a policy of continuous development and improvement the right is reserved to supply products which may differ from those illustrated and described in this publication. Certified dimensions will be supplied on request on receipt of order.