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The efficiency ratio indicates the expenses as a percentage of revenue (expenses / revenue), with a few variations – it is essentially how much a corporation
Efficiency_ratio
Cooling output divided by electricity input, as a standard for HVAC systems
The seasonal energy efficiency ratio (SEER) is a measurement used to rate the efficiency of air conditioners. The SEER rating of a device is the cooling
Seasonal energy efficiency ratio
Seasonal_energy_efficiency_ratio
Ratio of animal feed to desired product
animal husbandry, feed conversion ratio (FCR) or feed conversion rate is a ratio or rate measuring of the efficiency with which the bodies of livestock
Feed_conversion_ratio
Topics referred to by the same term
Energy efficiency may refer to: Energy efficiency (physics), the ratio between the useful output and input of an energy conversion process Electrical
Energy_efficiency
Degree to which a process minimizes waste of resources
value." Efficiency is very often confused with effectiveness. In general, efficiency is a measurable concept, quantitatively determined by the ratio of useful
Efficiency
Performance measure of a device that uses thermal energy
heat engine, thermal efficiency is the ratio of the net work output to the heat input; in the case of a heat pump, thermal efficiency (known as the coefficient
Thermal_efficiency
Measure of thermal efficiency
actual, season-long, average efficiency of that piece of equipment, including the operating transients. It is a dimensionless ratio of useful energy output
Annual fuel utilization efficiency
Annual_fuel_utilization_efficiency
Method of evaluating a protein's quality
Protein efficiency ratio (PER) is based on the weight gain of a test subject divided by its intake of a particular food protein during the test period
Protein_efficiency_ratio
Eurovent standards for air conditioner performance depending on time of year
seasonal efficiency of refrigeration equipment, chillers and air conditioners is often rated by the European seasonal energy efficiency ratio (ESEER) which
European seasonal energy efficiency ratio
European_seasonal_energy_efficiency_ratio
Property of photosensitive devices
converted electron (IPCE) ratio. In a charge-coupled device (CCD) or other photodetector, quantum efficiency is the ratio between the number of charge
Quantum_efficiency
Numerical value to determine the financial condition of a company
acceptable rate of return. Liquidity ratios measure the availability of cash to pay debt. Efficiency (activity) ratios measure how quickly a firm converts
Financial_ratio
Measure of aerodynamic efficiency
moving through air. It describes the aerodynamic efficiency under given flight conditions. The L/D ratio for any given body will vary according to these
Lift-to-drag_ratio
Measurement of resource allocation
In a business context, operational efficiency is a measurement of resource allocation and can be defined as the ratio between an output gained from the
Operational_efficiency
Ratio of an aircraft's wing span to its mean chord
often used to predict the aerodynamic efficiency of a wing because the lift-to-drag ratio increases with aspect ratio, improving the fuel economy in powered
Aspect_ratio_(aeronautics)
Combustion chamber capacity ratio
compression ratio is desirable because it allows an engine to extract more mechanical energy from a given amount of fuel due to its higher thermal efficiency. This
Compression_ratio
Proportion of ducted compared to combusted air in a turbofan engine
and increasing the compression ratio of the system by adding to the compressor stage to increase overall system efficiency increases temperatures at the
Bypass_ratio
Ratio of useful heating or cooling provided to work required
conditioning system is a ratio of the useful heating or cooling provided to the work (energy) required. Higher COPs equate to higher efficiency, lower energy (power)
Coefficient_of_performance
System that transfers heat from one space to another
characterized in the US by either its energy efficiency ratio (EER) or seasonal energy efficiency ratio (SEER), both of which have units of BTU/(h·W)
Heat_pump
Work done divided by heat provided
tire design all contribute to a vehicle's fuel efficiency. The efficiency of an engine is defined as ratio of the useful work done to the heat provided
Engine_efficiency
Indicator of value-for-money of a project or proposal
overrun Efficiency ratio Price–performance ratio Zangeneh, A., Jadid, S., & Rahimi-Kian, A. (2010). Normal boundary intersection and benefit–cost ratio for
Benefit–cost_ratio
Correlation factor comparing drag coefficient with an ideal wing
with an ideal wing having the same aspect ratio and an elliptical lift distribution. The Oswald efficiency is defined for the cases where the overall
Oswald_efficiency_number
Technology of indoor and vehicular environmental comfort
Energy Efficiency Ratio (EER) has traditionally been used to characterize the performance of many HVAC systems. EER is the Energy Efficiency Ratio based
Heating, ventilation, and air conditioning
Heating,_ventilation,_and_air_conditioning
Design parameter of gas turbines
maximum theoretical thermal efficiency in an ideal Brayton cycle engine, a high pressure ratio leads to higher thermal efficiency: η = 1 − ( 1 P R γ − 1 γ
Overall_pressure_ratio
Topics referred to by the same term
unit Effective exchange rate Energy efficiency rating in the Australian Capital Territory Energy efficiency ratio, of a cooling device Engineering education
EER
Form of thermal efficiency
Fuel efficiency (or fuel economy) is a form of thermal efficiency, meaning the ratio of effort to result of a process that converts chemical potential
Fuel_efficiency
Topics referred to by the same term
(mathematics), ratio between quantities in different units Price–earnings ratio, in finance, a measure of growth in earnings Player efficiency rating, a measure
Per
Measure of performance of heat engines
performance in reversible conditions. It is defined as the ratio of the thermal efficiency of an actual system compared to an idealized or reversible
Exergy_efficiency
Topics referred to by the same term
Scottish Government Resilience Room Seasonal energy efficiency ratio (SEER), measuring the efficiency of air conditioners Surveillance, Epidemiology, and
Seer
Measurement in finance
as to the true nature of the investment's return-generating efficiency. The Sortino ratio is used as a way to compare the risk-adjusted performance of
Sortino_ratio
Aircraft wing configuration with a non-planar, continuous surface wing
aerodynamic efficiency ratio and represents the ratio between the aerodynamic efficiency of a given non-planar wing and the corresponding efficiency of a reference
Closed_wing
Ratio of energy extracted from sunlight in solar cells
(VOC) ratio, and § Fill factor. Reflectance losses are accounted for by the quantum efficiency value, as they affect external quantum efficiency. Recombination
Solar_cell_efficiency
Period") is an efficiency ratio which measures the average number of days a company holds its inventory before selling it. The ratio measures the number
Days_in_inventory
Measure of engine efficiency
Volumetric efficiency (VE) in internal combustion engine engineering is defined as the ratio of the equivalent volume of the fresh air drawn into the
Volumetric_efficiency
Airbreathing jet engine designed to provide thrust by driving a fan
penalty relates to trying to improve the thermal efficiency of the engine by increasing pressure ratio and turbine temperature. This causes a corresponding
Turbofan
Dehumidification measurement
removal efficiency”. This metric is analogous to the seasonal energy efficiency ratio (SEER) that is used to compare cooling energy efficiency of competing
Moisture_removal_efficiency
Quality measure of a statistical method
"true" value in the L2 norm sense. The relative efficiency of two procedures is the ratio of their efficiencies, although often this concept is used where
Efficiency_(statistics)
Ratio of the output to input power of a machine
In mechanical engineering, mechanical efficiency is a dimensionless ratio that measures the efficiency of a mechanism or machine in transforming the power
Mechanical_efficiency
Measure of the efficiency of a rocket based on its propellant's mass
In aerospace engineering, rocket mass ratio or simply mass ratio is a measure of the efficiency of a rocket. It describes how much more massive the vehicle
Rocket_mass_ratio
Ratio between the useful output and the input of a machine
Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as
Energy_conversion_efficiency
Motor vehicle
total output of about 170 hp (127 kW; 172 PS). The engine's thermal efficiency ratio is claimed to be at the industry-leading 43% as of 2021. Fuel consumption
BYD_Qin_Plus
Formula for measuring financial risk
In finance, the Sharpe ratio (also known as the Sharpe index, the Sharpe measure, and the reward-to-variability ratio) measures the performance of an investment
Sharpe_ratio
if heat pump goes into fault. Seasonal average versus peak Energy Efficiency Ratio (EER) or coefficient of performance (COP). Contents: Top A B C D E
Glossary of geothermal heating and cooling
Glossary_of_geothermal_heating_and_cooling
Ratio to describe data-center efficiency
Power usage effectiveness (PUE) or power unit efficiency is a ratio that describes how efficiently a computer data center uses energy; specifically, how
Power_usage_effectiveness
Species of flowering plant with edible seeds
increases protein digestibility, essential amino acid index, and protein efficiency ratio. Raffinose and sucrose and other reducing sugars diffuse from the chickpea
Chickpea
Aircraft engine that produces thrust by emitting a jet of gas
propulsive efficiency, another factor is cycle efficiency; a jet engine is a form of heat engine. Heat engine efficiency is determined by the ratio of temperatures
Jet_engine
Efficiency factor is a ratio of some measure of performance to an expected value. In data communications, the factor is the ratio of the time to transmit
Efficiency_factor
Energy conversion in optics
In optics, wall-plug efficiency or radiant efficiency is the energy conversion efficiency with which the system converts electrical power into radiant
Wall-plug_efficiency
Compression ratio adjustment technology
changed. Higher loads require lower ratios to increase power, while lower loads need higher ratios to increase efficiency, i.e. to lower fuel consumption
Variable_compression_ratio
Cooling of air in an enclosed space
capacity.[citation needed] The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the
Air_conditioning
Indian government program
in 2016 that it would be switching to ISEER (Indian Seasonal Energy Efficiency Ratio) to calculate star ratings for air conditioners. This is an evolution
BEE_Star_Label
Method of evaluating a protein's quality
is different from measuring the quality of protein from the protein efficiency ratio (PER) and the biological value (BV) methods. The PER was based upon
Protein digestibility corrected amino acid score
Protein_digestibility_corrected_amino_acid_score
Balancing profit with social impact
performance such as the bank’s credit rating, portfolio at risk and efficiency ratio" but also notes that the bank was "established to mobilize funds for
Double_bottom_line
Company efficiency measure for paying suppliers
Days payable outstanding (DPO) is an efficiency ratio that measures the average number of days a company takes to pay its suppliers. The formula is DPO
Days_payable_outstanding
Grasshopper that has a swarming phase
larvae, as compared to 19–26 g / 100 g for beef. The calculated protein efficiency ratio is low, with 1.69 for locust protein compared to 2.5 for standard casein
Locust
Percentage of ingested nitrogen that is retained in the body
The proposition is contested, however, due to lack of data. Protein efficiency ratio Nitrogen balance "Scientific Opinion on Dietary Reference Values for
Net_protein_utilization
Topics referred to by the same term
input labeling Ecolabel Energy efficiency (disambiguation) Energy Efficiency Ratio or EER, a figure of merit for the efficiency of air conditioners, used in
Energy_rating
Measure of energy loss in storage systems
as the ratio of the energy output from the system during discharge to the energy input supplied during charging. A higher round-trip efficiency indicates
Roundtrip_efficiency
Energy consumption labelling scheme
500 hours per year) the cooling output at full load in kW the energy efficiency ratio in cooling mode at full load the appliance type (cooling only, cooling/heating)
European_Union_energy_label
Armour with plates spaced a distance apart
space between the armour and the plate. It was effective (mass-to-efficiency ratio), but easily detached from the vehicle so it did not spread widely
Spaced_armour
Methods for higher energy efficiency
redirect targets Energy conversion efficiency – Ratio between the useful output and the input of a machine Energy efficiency implementation Energy law – Law
Efficient_energy_use
German inventor and engineer (1858–1913)
His work in engine design was driven by the goal of much higher efficiency ratios. As opposed to outside ignition applied against internal air and fuel
Rudolf_Diesel
Mechanical transmission using multiple gears
of gears and gear trains include: The gear ratio of the pitch circles of mating gears defines the speed ratio and the mechanical advantage of the gear set
Gear_train
Operating expenses as percent of revenue
railroading, an operating ratio of 80 or lower is considered desirable. The operating ratio can be used to determine the efficiency of a company's management
Operating_ratio
Measure of the force amplification achieved by using a tool
experimentally. The ratio of the experimentally determined mechanical advantage to the ideal mechanical advantage is the mechanical efficiency η of the machine
Mechanical_advantage
Weakly optimal allocation of resources
addition to the context of efficiency in allocation, the concept of Pareto efficiency also arises in the context of efficiency in production vs. x-inefficiency:
Pareto_efficiency
System to transfer heat to/from the ground
systems with a higher efficiency. Cooling performance is typically expressed in units of BTU/hr/watt as the energy efficiency ratio (EER), while heating
Ground_source_heat_pump
Thermodynamic cycle
increases the efficiency of the Brayton cycle. This is analogous to the increase of efficiency seen in the Otto cycle when the compression ratio is increased
Brayton_cycle
Ratio between net income and investment
Return on investment (ROI) or return on costs (ROC) is the ratio between net income or profit to investment (costs resulting from an investment of some
Return_on_investment
coefficient (windows) SEER—seasonal E efficiency ratio SHGC—solar heat gain coefficient SIR—savings-to-investment ratio (energy conservation investments)
List_of_energy_abbreviations
Mass ratio of air to a fuel
Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process. The combustion may take place in a
Air–fuel_ratio
Statistical test that compares goodness of fit
Richard, Mark; Vecer, Jan (2021). "Efficiency Testing of Prediction Markets: Martingale Approach, Likelihood Ratio and Bayes Factor Analysis". Risks.
Likelihood-ratio_test
Engineering ratio
burners may achieve a ratio of 35.[unreliable source?] However, typical turndown ratio is 5. In the search for increased efficiency, even very small gas
Turndown_ratio
Solar power cell with multiple band gaps from different materials
efficiency is gained at the cost of increased complexity and manufacturing price. To date, their higher price and higher price-to-performance ratio have
Multi-junction_solar_cell
Carbon-neutral drop-in replacement fuel
study results, a comprehensive efficiency ratio is not 5-7 but rather a manageable 1.6 (e.g., the figure "total efficiency of mobility"). Proponents of
Electrofuel
Traditional financial ratio analysis more commonly includes liquidity ratios, profitability ratios, efficiency ratios, and leverage ratios. Measures related
Cost_accrual_ratio
Measure of a ligand's binding energy per atom
and pharmacological properties. Mathematically, ligand efficiency (LE) can be defined as the ratio of Gibbs free energy (ΔG) to the number of non-hydrogen
Ligand_efficiency
Ratio of a bank's capital to its risk
depositors and promote stability and efficiency of financial systems around the world. Capital adequacy ratios (CARs) are a measure of the amount of
Capital_adequacy_ratio
Amino acids required in diet since they can not be synthesized in body
Measures include the biological value, net protein utilization, protein efficiency ratio, protein digestibility corrected amino acid score and the complete
Essential_amino_acid
Measurement of sleep duration
Sleep efficiency (SE) is the ratio between the time a person spends asleep, and the total time dedicated to sleep (i.e. both sleeping and attempting to
Sleep_efficiency
Machine for continuous flow gas compression
(pressure ratios of 1.15–1.6) at design conditions with a polytropic efficiency in the region of 90–95%. To achieve different pressure ratios, axial compressors
Axial_compressor
Measure of how revenue growth translates into growth in operating income
and also by making variable costs more predictable. Cost accounting Efficiency ratio Operating margin Financial leverage Contribution margin Operating and
Operating_leverage
Topics referred to by the same term
Amazon S3 buckets in different AWS Regions Cost Revenue Ratio, also known as efficiency ratio This disambiguation page lists articles associated with
CRR
Internal combustion engine type
is a two-stroke engine or four-stroke design, volumetric efficiency, losses, air-to-fuel ratio, the calorific value of the fuel, oxygen content of the
Four-stroke_engine
Nitrogen composition in the human body
Protein (nutrient) Biological value Net protein utilization Protein efficiency ratio Protein digestibility Protein Digestibility Corrected Amino Acid Score
Nitrogen_balance
Scientific method
the dynamic range is the ratio of the maximum FRET efficiency ratio (calcium saturated) to the minimum FRET efficiency ratio (calcium depleted). Yet another
Calcium_imaging
kilotonnes of CO2 into three reservoirs and reported an average CO2 capture efficiency ratio 75.2%. Between 2015 and 2021 the Quest facility received two carbon
Quest Carbon Capture and Storage Project
Quest_Carbon_Capture_and_Storage_Project
Controversy generated by fraud perpetrated by Wells Fargo
reliance on its "sales organization". The bank also revised up its 2017 efficiency-ratio goal from 60 to 61. The CFPB fined Wells Fargo $100 million on September
Wells Fargo cross-selling scandal
Wells_Fargo_cross-selling_scandal
Ratio of operating income to net sales
contribution margin ratio and the margin of safety are equal. At this point, profitability reflects a balance between margin efficiency and sales volume
Operating_margin
Maximum theoretical efficiency of a solar cell
physics, the radiative efficiency limit (also known as the detailed balance limit, Shockley–Queisser limit, Shockley–Queisser efficiency limit or SQ limit)
Shockley–Queisser_limit
metrics like coefficient of performance (COP) and Seasonal Energy Efficiency Ratio (SEER), which consider energy use but not global warming potential
Life Cycle Climate Performance
Life_Cycle_Climate_Performance
Valuation in finance
project's investment per dollar invested. This is known as the capital efficiency ratio. The formula for the net present value per dollar investment (NPVI)
Net_present_value
South African politician and lawyer (1968–2020)
his appointment. The Creditor's System Efficiency Ratio, a performance indicator used to measure the efficiency of paying creditors, has a target of 80%
Mongameli_Bobani
Turbojet engine component
core and afterburner efficiency. In turbojets the gain is limited to 50%, whereas in a turbofan it depends on the bypass ratio and can be as much as
Afterburner
Energy released in nuclear weapons explosions
increased net damage efficiency (bomb damage/bomb mass) of multiple warhead systems have resulted in increases in the yield/mass ratio for single modern
Nuclear_weapon_yield
Information rate that can be transmitted over a given bandwidth
Spectral efficiency (alternatively, spectrum efficiency or bandwidth efficiency) refers to the information rate that can be transmitted over a given bandwidth
Spectral_efficiency
concepts are also very closely related to the feed conversion ratio (FCR) and feed efficiency. Aryal, Achyut; Guan, Li-Ching; Xu, Wei (September 20, 2008)
Efficiency_of_food_conversion
Nutrient for the human body
Score) which was developed by the FDA as a modification of the Protein efficiency ratio (PER) method. The PDCAAS rating was adopted by the US Food and Drug
Protein_(nutrient)
Supercomputer in Kobe, Japan
the world at the time; it achieved this performance with a computing efficiency ratio of 93.0%. The previous record holder was the Chinese National University
K_computer
Japanese electronics company
with Energy Efficiency Services Limited to develop a 1.5-ton inverter air conditioner (AC) with an Indian Seasonal Energy Efficiency Ratio (ISEER) of 5
Sanyo
Measurement used for wind turbines
a blade and the actual speed of the wind, v. The tip-speed ratio is related to efficiency, with the optimum varying with blade design. Higher tip speeds
Tip-speed_ratio
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