Replacement of Circulation Pumps for Heating Groups in Buildings
Heating Technology
Measure Goal
The goal is to estimate the electricity savings triggered by replacing circulation pumps for heating groups in buildings with more efficient and smaller models.
Examples and Scenarios
Replacement of one primary circuit circulation pump and two circulation pumps for heating groups in a residential building with a standard heating load of 250 kW
Inputs
3 Umwälzpumpen (2x Heizgruppe, 1x Heizkessel)
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 | |
|---|---|---|
| Energy efficiency (according to EnEV) | - | Wet-rotor circulation pump with Q < 1.8 m³/h: EEI ≤ 18 Wet-rotor circulation pump with Q ≥ 1.8 m³/h: EEI ≤ 17 Water pump with motor: MEI ≥ 0.7 (with IE4 motor) Q = nominal flow rate |
| Sizing | - | The rated electrical power P1 of the new circulation pump must be sized to the standard heating load (and not the installed heat-generator capacity) of the group or building. |
| Implementation | The replacement and commissioning of the new system must be carried out by a qualified specialist or company. | |
| Disposal | The consumption-relevant components of the old devices may not continue to be operated within Switzerland. Proper disposal or export must be demonstrable on request. | |
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.Explanation (PDF format, max. 2 A4 pages) of how it is ensured that the replaced devices were properly disposed of (e.g. by means of declarations, disposal items on contractor invoices, etc.).
- 2.Invoice documents (PDF, PNG or JPEG format)
- 3.Images/photos of the rating plates of the old devices and the new installation (PDF, PNG or JPEG format)
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ContactSymbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
E | annual electricity consumption | kWh/a |
ΔEeco | cumulative electricity savings | kWh |
Ė | electrical power consumption | kW |
H | delivery head | mWS |
Q | flow rate | m³/h |
ton | annual operating hours | h/a |
η | efficiency | — |
Calculation Formulas
Cumulative Electricity Savings
The cumulative electricity savings result from the difference between the electricity consumption of the old and new state, multiplied by the reduction factor and the standard effective duration.
Annual Electricity Consumption
The annual electricity consumption is calculated based on the electrical power consumption at different partial loads and the annual operating hours.