Visualizing Loss Amounts and CO2 Emissions Through Air Leak Investigation
In factory equipment, compressed air serves various purposes as a power source, but air leaks through gaps in piping and equipment are often an overlooked problem. In reality, approximately 10% to 30% of compressed air used in factories leaks invisibly, and it is not uncommon for this to lead to annual economic losses exceeding several million yen and significant CO2 emissions.
However, many factory operations managers are faced with questions such as "how much loss is actually occurring" and "how should CO2 emissions be calculated." This article provides a detailed explanation of specific calculation methods for accurately visualizing and quantifying losses through effective air leak investigation, with practical procedures and case studies.
Calculation Methods and Loss Quantification in Air Leak Investigation
Compressors account for a large proportion of factory electricity consumption, and air leak inspection and repair is one of the relatively easy measures to reduce their power consumption. Approximately 10% to 30% of compressed air used in factories reportedly leaks invisibly, making it important to quantitatively understand these losses.
Advances in Measurement Technology for Air Leak Investigation
In recent years, air leak cameras equipped with ultrasonic sensors can instantly identify air leak locations even in operating equipment and measure estimated leak volumes. Compared to conventional inspection methods requiring work stoppages, the major advantage is accurate measurement with minimal production impact.
Specific Procedures for Loss Amount Calculation
Loss amount calculation from air leaks is performed through the following steps.
Basic Data Collection
Collect fundamental data including detected leak volumes (in L/min), compressor efficiency, annual operating hours, and electricity unit prices.
Annual Estimated Leak Volume Calculation
Calculate total annual leak volume by multiplying the measured instantaneous leak volume by annual operating hours.
Power Loss Calculation
Considering compressor efficiency, calculate the additional power required to compensate for leaked air.
Annual Loss Amount Determination
Determine the estimated annual loss amount by multiplying the calculated additional power by the electricity unit price.
In actual investigation cases, total annual estimated losses from multiple leak locations have been confirmed to exceed several million yen, and for companies with multiple factory buildings, the total could be even larger.
Environmental Impact of Air Leaks and CO2 Emission Calculation Methods
Electricity wasted due to air leaks directly translates to CO2 emissions. As corporate decarbonization management gains importance, understanding CO2 emissions from air leaks has become an essential element in recognizing the importance of countermeasures from an environmental perspective.
Basic Principles of CO2 Emission Calculation
CO2 emission calculation is performed by multiplying the electricity lost to air leaks (kWh) by the CO2 emission factor (kg-CO2/kWh) specific to each power company. This calculation enables quantification of the specific environmental impact of air leaks.
Actual Calculation Procedures and Examples
Loss Power Calculation
Annual loss power is obtained by dividing the annual loss amount by the electricity unit price. For example, if an annual loss of 163,200 yen occurs, assuming an electricity rate of 19 yen/kWh, the annual loss power would be approximately 8,589 kWh.
CO2 Emission Calculation
Multiply the calculated annual loss power (kWh) by the CO2 emission factor (kg-CO2/kWh) published by your contracted power company to determine annual CO2 emissions. Since emission factors vary by power company and fiscal year, reference the latest published values.
Formula: Annual CO2 emissions (t-CO2) = Annual loss power (kWh) x Published factor (kg-CO2/kWh) / 1,000
In actual investigation cases, reductions of approximately 4 to 5 t-CO2 annually have been confirmed, and depending on equipment scale and operating conditions, reductions reaching tens of t-CO2 per year have been verified. These results demonstrate that air leak countermeasures significantly contribute to CO2 reduction.
Comprehensive Loss Calculation Methods and Evaluation Metrics
To accurately understand losses from air leaks, a comprehensive evaluation including not only direct power losses but also indirect impacts is necessary. In factory operations, air leaks affect management in various forms beyond the visible increase in electricity costs.
Step-by-Step Loss Calculation Approach
Accurate Air Leak Volume Measurement
Identify leak volumes by combining multiple methods including detailed inspections by specialists, flow meter measurements, and pressure drop method estimates. Improved measurement accuracy significantly enhances the reliability of subsequent calculations.
Direct Power Loss Calculation
Calculate the additional electricity cost from excess compressor operation due to measured air leaks. Detailed consideration of compressor efficiency, operating patterns, and electricity rate structures is essential.
Indirect Loss Evaluation Items
Impact on Product Quality
Quantify losses from product quality degradation due to insufficient air pressure, calculated from defect occurrence and product unit prices. This impact tends to be particularly pronounced in precision machining and automated production lines.
Increased Equipment Maintenance Costs
Include repair costs from equipment failures caused by air leaks and opportunity costs from unplanned production stoppages.
Impact on Work Environment
Evaluate the impact on work efficiency from increased noise, deteriorated work environment, and reduced safety.
Optimizing Factory Operations Through Air Leak Countermeasures
This article has detailed calculation methods for loss amounts and CO2 emissions from air leaks. Approximately 10% to 30% of compressed air used in factories leaks invisibly, leading to annual losses of several million yen and significant CO2 emissions. Advances in measurement technology using the latest ultrasonic sensor-equipped cameras now enable accurate assessment of leak volumes, power losses, environmental impacts, and indirect losses even in operating equipment.
AirMore Co., Ltd., as an air leak solution specialist, provides high-precision air leak diagnosis that identifies and quantifies leak locations even during factory operation, visualizing annual loss costs and CO2 emissions. With a track record of detecting hundreds of leak locations and contributing to CO2 reduction, AirMore supports factory energy conservation activities with concrete numbers through accurate and reliable loss calculations.
