• Fans - hvac English

Payback Time: 0 - 3 years

Energy Saving Potential: 10 - 15 percent

• "Volume flow of a ventilation system is the volume of transported air per unit of time. The more volume flow is delivered, the higher the energy used. The energy requirements consist of: transport energy, heating/cooling energy, air humidification, dehumidification, maintenance costs. The analysis of the volumetric flow rate is therefore an important measure for the reduction of the energy costs of a ventilation system. Since many ventilation systems have been built with a rigid volume flow, the system constantly conveys a defined amount of air to the consumers regardless of the demand. But only in the rarest cases the nominal volume flow (installed volume flow) is required. A variable volume flow control eliminates the problem and achieves the greater energy savings. "

Volume flow of a ventilation system is the volume of transported air per unit of time. The more volume flow is delivered, the higher the energy used. The energy requirements consist of: transport energy, heating/cooling energy, air humidification, dehumidification, maintenance costs. The analysis of the volumetric flow rate is therefore an important measure for the reduction of the energy costs of a ventilation system. Since many ventilation systems have been built with a rigid volume flow, the system constantly conveys a defined amount of air to the consumers regardless of the demand. But only in the rarest cases the nominal volume flow (installed volume flow) is required. A variable volume flow control eliminates the problem and achieves the greater energy savings.

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• Fans - hvac English

Payback Time: 3 - 6 years

Energy Saving Potential: 10 - 30 percent

• Volume flow of a ventilation system is the volume of transported air per unit of time. In many ventilation systems, the set flow is greater than necessary. Most of the time this comes from safety margins of 5-15% that are applied in the planning phase to guarantee the required values (MAK values, moisture load, air exchange rate, etc.). However, the more volume flow is delivered, the higher the energy used. In some cases, optimization of certain parts of the system is not sufficient enough. In this case, existing components can be exchanged for new, more efficient components. The following equipment parts can be affected: fan, coupling, motor.

Volume flow of a ventilation system is the volume of transported air per unit of time. In many ventilation systems, the set flow is greater than necessary. Most of the time this comes from safety margins of 5-15% that are applied in the planning phase to guarantee the required values (MAK values, moisture load, air exchange rate, etc.). However, the more volume flow is delivered, the higher the energy used. In some cases, optimization of certain parts of the system is not sufficient enough. In this case, existing components can be exchanged for new, more efficient components. The following equipment parts can be affected: fan, coupling, motor.

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• Fans - hvac English

Payback Time: 0 - 3 years

Energy Saving Potential: 5 - 5 percent

• "Existing components can be exchanged for new, more efficient components. In order to get an indication whether the transport system (fan, drive type, motor) is efficient or inefficient, the specific fan power value (SFP) can be used. This measure indicates how much energy is needed for the transport of a given volume flow. All occurring losses (efficiencies, pressure losses, line losses, etc. ) are included in this figure. Determining the specific fan power (SFP) requires the following data: • Electrical power consumption (Pel) of the fan motor [W] • Nominal volume flow by the fan [m3/s] The lower the PSFP value, the more effective the system will be. "

Existing components can be exchanged for new, more efficient components. In order to get an indication whether the transport system (fan, drive type, motor) is efficient or inefficient, the specific fan power value (SFP) can be used. This measure indicates how much energy is needed for the transport of a given volume flow. All occurring losses (efficiencies, pressure losses, line losses, etc. ) are included in this figure. Determining the specific fan power (SFP) requires the following data: • Electrical power consumption (Pel) of the fan motor [W] • Nominal volume flow by the fan [m3/s] The lower the PSFP value, the more effective the system will be.

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• Fans - hvac English

Payback Time: 0 - 3 years

Energy Saving Potential: 15 - 30 percent

• "Basically, the classification of heat and moisture recovery is categorized in recuperative and regenerative systems. Recuperators are heat exchangers with separate chambers between the media that allow heat transfer. The air flows are always strictly separated in recuperators (eg. plate heat exchangers). Regenerators, on the other hand, function by exploiting an energy-storing mass through which exhaust air or fresh air flows alternately (for example, rotary heat exchangers). Both types are available with and without moisture recovery. The heat pump is an additional way of transferring the heat from the exhaust air to the supply air. Of the heat and moisture transfer plate heat exchangers and rotary heat exchangers are pretty much equal with the appropriate quality of execution. The technically simpler, more robust and less expensive solution is the plate heat exchanger. The low icing temperature of the rotary heat exchanger makes it particularly interesting for renovations where no geothermal heat exchanger can be implemented. Here, depending on the climate, you can completely spare the electric antifreeze register or set it to very low temperatures. "

Basically, the classification of heat and moisture recovery is categorized in recuperative and regenerative systems. Recuperators are heat exchangers with separate chambers between the media that allow heat transfer. The air flows are always strictly separated in recuperators (eg. plate heat exchangers). Regenerators, on the other hand, function by exploiting an energy-storing mass through which exhaust air or fresh air flows alternately (for example, rotary heat exchangers). Both types are available with and without moisture recovery. The heat pump is an additional way of transferring the heat from the exhaust air to the supply air. Of the heat and moisture transfer plate heat exchangers and rotary heat exchangers are pretty much equal with the appropriate quality of execution. The technically simpler, more robust and less expensive solution is the plate heat exchanger. The low icing temperature of the rotary heat exchanger makes it particularly interesting for renovations where no geothermal heat exchanger can be implemented. Here, depending on the climate, you can completely spare the electric antifreeze register or set it to very low temperatures.

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• Fans - hvac English

Payback Time: 0 - 3 years

Energy Saving Potential: 10 - 30 percent

• "Maintenance and servicing of filters, air ducts and fittings has a significant impact on the efficiency of a ventilation system. Maintenance and servicing of these components is all too often neglected when considering the ventilation system, although they can represent a high proportion of the required energy input. The effects of poorly maintained or leaking equipment are manifested in increased flow or pressure drop. "

Maintenance and servicing of filters, air ducts and fittings has a significant impact on the efficiency of a ventilation system. Maintenance and servicing of these components is all too often neglected when considering the ventilation system, although they can represent a high proportion of the required energy input. The effects of poorly maintained or leaking equipment are manifested in increased flow or pressure drop.

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