SFOE standard catalogue · Ventilation · Version 1.0
Operational Optimization of Ventilation Systems
The goal is to estimate the electricity savings triggered by the operational optimization of existing ventilation systems. This includes adjusting operating times or installing modulating control systems.
Requirements
Only measures that meet the requirements of the Energy Ordinance (SR 730.01; EnV) can be credited. The additional requirements for the technical characteristics and for the implementation of the measure are set out in Table 1.
| Old system | New system | |
|---|---|---|
| Coupling / gearbox | - | For a drive with three-phase motors up to a shaft power of 5 kW, direct coupling must be chosen. |
| Savings | Replacement without detailed analysis: | |
| The electricity savings are calculated automatically in the monitoring list (Table B). This approach can only be applied up to a rated electrical motor power of 20 kW (old system). | ||
| Replacement with detailed analysis: | ||
| The analysis must be carried out over at least several representative weeks, including weekends. It is important not to alter the actual state during the analysis. The following results of the analysis must be documented: - The required supply-air volume flow and total pressure difference, including profile - Determine the efficiencies of the components at the best point and at the expected operating points - For applications with variable operation, it is useful to specify typical operating points with their frequency - Ducting concept and pressure-loss calculation - The electrical power consumption (active power) in operating condition (at the required air volume flow and delivery pressure). - Electricity demand - Extrapolation to 1 year The analysis must show the possible optimisation measures of the new ventilation system as well as the calculation of the annual consumption taking into account a fan that meets the minimum efficiency required in Annex 1. For savings of more than 30%, these must be justified clearly and in detail. | ||
| Implementation | The replacement and commissioning of the new system must be carried out by a qualified specialist or company. | |
Proof of compliance
Compliance with the requirements must be demonstrated by the following documents. The documents listed in Table 2 are an integral part of the proof of measure implementation.
- 1.In the case of a replacement with detailed analysis: the analysis report (PDF format) prepared by a qualified person or company.
- 2.In the case of a replacement without detailed analysis: a photo of the rating plate (PNG, JPEG or PDF format) or equivalent proof containing the same information (e.g. a data sheet)
- 3.Invoice documents (PDF, PNG or JPEG format)
Calculation basics: symbols, units and formulasNot needed for the review, useful for recalculating
Symbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
E | annual electricity consumption | kWh/a |
ΔEeco | cumulative electricity savings | kWh |
feco | reduction factor | — |
Ns | standard effective duration | a |
t | operating hours | h/a |
qv | volume flow rate | m³/h |
Calculation Formulas
Creditable Electricity Savings
The creditable electricity savings result from the difference between the current and new annual electricity consumption, multiplied by the reduction factor (0.75) and the standard effective duration. The standard effective duration is 1 year for adjusting operating times and 4 years for installing modulating control.
Stromeinsparung durch Betriebszeitanpassung
The electricity savings from adjusting operating times result from the old electricity consumption multiplied by the relative reduction in operating hours.
Stromeinsparung durch modulierende Steuerung
When installing modulating control, the power consumption in part-load operation is reduced proportionally to the 2.5 power of the relative volume flow. This leads to significant savings compared to operation at constant speed.
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Part of the EFFEL programme
Standardised measures are one of two measure types in the EFFEL programme (efficiency improvements by electricity suppliers, Art. 46b EnG). They follow a predefined SFOE catalogue with fixed savings values.