efficiency
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efficiency
A physical or technical quantity that describes the ratio of usable output power to supplied input power. It is a measure of the efficiency of a device or process and is usually given as a percentage.
Moderne Elektromotoren erreichen einen Wirkungsgrad von über 95 Prozent.
Modern electric motors achieve an efficiency of over 95 percent.
efficiency
In a figurative sense, the effectiveness or efficiency of a measure, investment, or action, often in an economic or organizational context.
Der Wirkungsgrad der neuen Werbekampagne war leider sehr gering.
The efficiency of the new advertising campaign was unfortunately very low.
The word consists of 'Wirkung' (effect), the linking -s, and 'Grad' (degree). So it literally describes the 'degree of effect' and is a measure of efficiency.
Der Wirkungsgrad gibt an, wie effizient Energie umgewandelt wird.
The efficiency indicates how efficiently energy is converted.
'Wirkungsgrad' (efficiency) is a technical term from engineering and physics. Even in the figurative, economic meaning, the word sounds very formal and analytical.
Im Physikunterricht haben wir den Wirkungsgrad einer Glühbirne berechnet.
In physics class, we calculated the efficiency of a light bulb.
Common verbs used with 'Wirkungsgrad' (efficiency) are 'haben' (to have), 'erreichen' (to achieve), 'erhöhen' (to increase), 'verbessern' (to improve), or 'steigern' (to raise/increase).
Mit der neuen Technologie konnten wir den Wirkungsgrad deutlich steigern.
With the new technology, we were able to significantly increase the efficiency.
You can recognize the literal meaning in the context of technical devices (motor, heating system, solar cell). You can recognize the figurative meaning in the context of economic or social topics (advertising, measure, investment).
Der Wirkungsgrad dieser Heizung ist sehr hoch.
The efficiency of this heating system is very high.
efficiency
Effizienz generally assesses the relationship between the result and the effort involved, for example in a way of working or a device. Wirkungsgrad, by contrast, is a technical quantity: it compares the usable output power with the supplied input power and is usually given as a percentage.
Der Techniker berechnet den Wirkungsgrad der Heizung aus der zugeführten und der nutzbar abgegebenen Leistung.
The technician calculates the heater's efficiency from the supplied input power and the usable output power.
Wir bewerten die Effizienz der Heizung anhand des Energieverbrauchs und der erreichten Raumwärme.
We assess the heater's efficiency based on its energy consumption and the room temperature it achieves.
