at an efficiency of

USAGE SUMMARY

The phrase "at an efficiency of" is correct and usable in written English.
It can be used when discussing the performance or effectiveness of a process, system, or machine in terms of efficiency. Example: "The new engine operates at an efficiency of 95%, significantly reducing fuel consumption."

✓ Grammatically correct

Science

News & Media

Academia

Human-verified examples from authoritative sources

Exact Expressions

33 human-written examples

Acini formed at an efficiency of around 30 acini/1 × 104 mammary epithelial cells plated.

Nature

The CFB is expected to operate at an efficiency of η=82.82%.

Chemical Engineering Science

Rejection of the background protons was performed at an efficiency of ∼2000 using the shower imaging capability with high granulation.

Advances in Space Research

Even if one percent of the country's land area were to be used to harness the abundantly available solar insolation at an efficiency of 10%, the country could generate 570 times India's current electricity demand.

The Guardian - Opinion

Covering 1.7percentt of the United States' land area with solar collectors operating at an efficiency of 10percentt would supply three terawatts of power, enough to meet America's energy needs, according to Nate Lewis, a chemist at Caltech.

MIT Technology Review

The polarization characteristics of the thin-walled geometry indicated that the maximum power density obtained was 1.18 W cm−2 at an efficiency of around 60%.

Journal of Power Sources

Human-verified similar examples from authoritative sources

Similar Expressions

27 human-written examples

The peptide was able to penetrate into MEFs within 1 h at 37 °C with an efficiency of around 90% at 0.1 mM.

Biochimica et Biophysica Acta (BBA) - Biomembranes

It also charges at a voltage of 3.0 and discharges at 2.8 volts - an efficiency of 93% - meaning it loses surprisingly little energy as heat.

BBC

Our CZTSSe device (rapidly annealed at 400 °C) exhibits an efficiency of 4.67% under AM 1.5 illumination.

Solar Energy Materials and Solar Cells

The motors that drive the pumps work at 6 kV with an efficiency of 98%.

Energy, Sustainability and Society

All primer sets had an efficiency of at least 90%.

BMC Plant Biology

Expert writing Tips

Best practice

When using "at an efficiency of", ensure the context clearly defines what is being measured. For example, specify whether it refers to energy conversion, resource utilization, or process optimization.

Common error

Avoid using "at an efficiency of" without specifying the parameters being measured. Vague statements about efficiency can be misleading. Instead, quantify what you are measuring and its impact, such as energy saved or output increased.

Linguistic Context

The phrase "at an efficiency of" primarily functions as a prepositional phrase modifying a verb or noun, specifying the degree of effectiveness or performance. Ludwig AI indicates that the phrase is considered grammatically sound and widely applicable in describing performance metrics.

Expression frequency: Very common

Frequent in

Science

54%

News & Media

21%

Academia

8%

Less common in

Formal & Business

0%

Encyclopedias

4%

Reference

0%

Ludwig's WRAP-UP

The phrase "at an efficiency of" is a common and grammatically correct way to express the effectiveness of a process or system. Ludwig AI confirms its validity and wide applicability. It’s primarily used in formal and scientific contexts to quantify performance, though it also appears in news media. When using this phrase, be sure to specify what you are measuring to avoid ambiguity. Alternatives like "with an efficiency of" and "achieving an efficiency of" can be used for subtle variations in meaning. Based on the contexts, the most frequent authoritative sources are ScienceDirect, PlosOne, Forbes, The New York Times and The Economist.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

with an efficiency of

Replaces "at" with "with", a subtle change maintaining the same meaning.

achieving an efficiency of

Replaces "at" with "achieving", emphasizing the attainment of efficiency.

demonstrating an efficiency of

Highlights the act of showing efficiency rather than just being at a level.

performing with an efficiency of

Uses "performing" instead of the implicit action of being "at", focusing on the act of efficiency.

exhibiting an efficiency of

Uses "exhibiting" to showcase the efficiency in action, similar to 'demonstrating'.

running with an efficiency of

Implies a continuous operation at a certain efficiency level.

operating at an efficiency level of

Adds the word "level" and replaces the verb "is" with "operating", specifying the current effectiveness.

having an efficiency rating of

Substitutes "efficiency" with "efficiency rating", and "at" with "having", denoting the quality of performance

maintaining an efficiency of

Focuses on sustaining a certain level of efficiency over time.

with a performance efficiency of

Changes the structure to emphasize "performance" as the primary aspect, using "with" instead of "at".

FAQs

How do you use "at an efficiency of" in a sentence?

Use "at an efficiency of" to describe the effectiveness of a process or device. For example: "The solar panel operates "at an efficiency of" 20%."

What can I say instead of "at an efficiency of"?

Alternatives include "with an efficiency of", "operating at an efficiency level of", or "achieving an efficiency of" depending on the context.

What is the difference between "at an efficiency of" and "with an efficiency of"?

The difference is subtle. "At an efficiency of" describes a current state, while "with an efficiency of" focuses more on a characteristic. Both are generally interchangeable.

Is it correct to say "at a rate of efficiency" instead of "at an efficiency of"?

While technically correct, "at a rate of efficiency" is less common and can sound redundant. Using "at an efficiency of" is more concise and widely accepted.