Reduction of Condenser Air Short-Circuits
Refrigeration Technology
Measure Goal
The goal is to standardize the calculation of electricity savings that are triggered by reducing condenser air short circuits to lower the condensation temperature.
Examples and Scenarios
Elimination of air short circuits in a condenser with 60 kW
Inputs
Elektrische Leistung: 60 kW, Betriebsstunden: 5'000 h/a, Temperaturreduktion: 3 K
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.
| Technology | Mains-operated refrigeration systems within the scope of Annexes 1.14 or 2.11 EnEV (SR 730.02; EnEV) with a rated cooling capacity of up to: - 40 kW in the application area of above-zero cooling - 30 kW in the application area of below-zero cooling - 80 kW in the application area of comfort air-conditioning with direct evaporator - 200 kW in the application areas of comfort air-conditioning with refrigerant carrier, IT servers and process cooling Systems operated with R-744 (CO2) and all types of cascade systems are excluded. |
|---|---|
| Implementation | The measure must be carried out by a qualified specialist / 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.Photographic report of the retrofit (PDF format), including the date and the company that carried out the retrofit (UID, name and registered office)
- 2.Invoice documents (PDF, PNG or JPEG format)
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ContactSymbols, Terms and Units
| Symbol | Description | Unit |
|---|---|---|
ΔE | annual electricity savings | kWh/a |
ΔEeco | cumulative electricity savings | kWh |
Pel | electrical power consumption | kW |
ΔTK | condensation temperature difference | K |
hB | annual operating hours | h/a |
Ns | standard effective duration | a |
Calculation Formulas
Annual Electricity Savings
The annual electricity savings result from the electrical power consumption, operating hours and temperature difference (approx. 3% savings per K).
Cumulative Electricity Savings
The cumulative electricity savings result from the annual savings multiplied by the standard effective duration.