Compressor calculator. Pump Gas Diesel E85/E100 Methanol. An engine's compressio ratio is the ratio of its cylinder volume at top of piston travel (Top Dead Center) to the bottom of piston travel (Bottom Dead Center). Optimize your compressed air system. Finally, calculate COP. Plugging the numbers into our fill time calculator gives us about 8. 12 USD/cubic foot. STEP 4 : calculate the actual power requirement. The Formula. Bore. 5:1, and cylinder hea. 5 = 3 Cubic Feet. In this case, the heat pump removes 30 kWh of heat. k is the Gas Isentropic Coefficient. Once this is done, multiply the tank size, pressure rating, and conversion factor to get the Sizing Calculator. Discover our solutions for your compression needs by applying your process conditions to our sizing tool. 3. 746 (Power Factor) X Hours of operation X Required capacity of receiver tank. 31k(MTo−Ti)Q. calculation looks like hit the "Sample" button. Stroke. ) Adjusted Stroke (in. Compressor power simplified formula. 293 watt-hours, or the energy released by burning one match. 1 watt is approximately 3. Choose the right screw compressor model for your application by entering in values below. Grating Pulse Compressor: Center wavelength (nm) Distance between gratings (mm) Groove density (l/mm) AOI on 1st grating (degrees) Double-pass GDD (fs 2) Oct 25, 2021 · Compressor Ratio or Compression Ratio is a ratio of the volumes. See what you can save with a Sensi Smart Thermostat. This shows that the compressor can pump 3. Oblique Shock Relations Perfect Gas, Gamma = , angles in degrees. 037 cfm @ 100 psi. The swept volume of one piston can be calculated the following way Compression Ratio Calculator. Fixed speed vs VSD energy saving calculator. C1 5 days ago · Example Calculation. 1. 5 min ≧ (30 seconds or more) Qs=. Next, determine the useful output or removal of heat by the pump. It is important to understand what pressure is needed in order to size the compressor properly, otherwise Use the air receiver calculator to optimize your compressed air system. Calculating the energy consumption of compressors is crucial for a variety of reasons: Engine Calculator Use this form to help you figure out your engine specs. You can also compare the performance of different prism materials and geometries, and calculate the optical path, GDD, TOD, and pulse elongation. Use this air compressor energy consumption calculator to estimate how much it costs to run your motor. Air-Breaithing Propulsion Calculator. The air receiver should be at least 5 gallons per cfm for optimal results. In a reciprocating compressor, the capacity depends on the volume displaced by the piston during its movement. Let’s consider a 60-gallon air compressor with a CFM rating of 5. To is the Outlet Temperature in °C. As the calculation window is resized, the compressor map is also resized to be displayed as large as possible. To get a feel for how much air (CFM) you will need, you can figure roughly 4-5 CFM per person in an automotive shop and 12-15 per person in a body shop. Let's calculate the DCR for an engine with a swept volume of 500 cc, a clearance volume of 50 cc, and a static compression ratio of 10:1. ) Intake Closing Point (degrees) ABDC @ 0. Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine. 72 which gives a required power of 156/0. Number Of Cylinders - Number of Pistons in your Engine. Reciprocating compressor capacity calculation formula. mm Stroke: in. Users can generate non-standard conditions compressor Palm beach: 1956 W 9th St Riviera Beach, FL 33404 Monday – Friday 7:30 AM - 4:30 PM Map and Directions. DYNAMIC EFFECTIVE COMPRESSION RATIO. Compress Efficiency. Nov 1, 2011 · In this tip of the month (TOTM) we will present the compressor calculations of a case study. Free Air - Compression Ratio The ratio of compressed air pressure to free air pressure. Most air compressors mention their CFM in the manual. Sep 29, 2023 · Isentropic Work Done Calculator. Sep 22, 2023 · CFM is the amount of air that an air compressor can deliver in one minute and it depends on the compressor’s horsepower, tank size, and maximum pressure. BTU is often used as a point of reference for comparing Sensi Smart Thermostat Savings Calculator. 4-20)/29*2587 / 1000 = 156 kW. Compressed Air Quality Compressed air is used for power tools, instrumentation, processing, breathing and medical purposes. m3/min. An air compressor CFM calculator takes into account the volume of the tank, desired pressure, fill-up time, and operational factors to estimate the airflow of the compressor. Cost per kW*. (Note: If you click the buttons more than once, it will continue to add to the bore's value. Try all of our converters & calculators. Access our free Excel calculator for quick estimates. Plugging these values into the formula: Condensing Capacity = (5000 + 7000) / 3. Last update 14th December 2023 (with the assistance of Neil Sandham, U. Additionally, system designers can simulate a refrigeration rack of up to 10 compressors, perform seasonal analysis and determine its annual operating cost. Example Calculation. Oct 7, 2023 · The capacity of a reciprocating air compressor can be calculated using the following formula: Capacity (Q) = Displacement Volume (Vd) × Compressor Speed (N) Where: Capacity (Q): This represents the flow rate or the amount of compressed air delivered by the compressor per unit of time. To calculate compressor energy usage, follow these simple steps: Gather Data: You will need two pieces of information – the compressor power usage (in watts) and the time of usage (in minutes). C1 = 320 CFM. Product Selection Software is an integrated PC based software tool that allows users to select and generate compressor performance. Sep 28, 2023 · September 28, 2023 by GEGCalculators. The ratio knobs help in setting the quantity of applied compression. Formula. The formula used in this calculator is as follows: P=k−12. Compressor efficiencies vary with compressor type, size, and throughput. Note : for a centrifugal compressor, the same calculation is done Critical Pressure (Pc) Bar A. This calculator is designed to show the different Compression Ratios for different sized engines. Miami: 7292 NW 25th St Doral, FL 33122 Monday – Friday 7:30 AM - 4:30 PM Home Air Receiver Calculation Water in the air Pressure drop Cost of pressure drop Leakages Pipe width Volume conversion Cooling airflow Unit Conversion Contact Info. It is an important parameter that affects engine performance, efficiency, and power output. 65 and having CR > 2. The difference will give you the enthalpy change. C2 = 448. Per illustration below, if 100 psi is required to move the block, anything less than that will not accomplish the task. Users are requested to check the SI units carefully before proceeding with the final calculations. The air compressor CFM calculator estimates the airflow delivered by the compressor. Say the refrigerant has an enthalpy of 250 kJ/kg as it enters and 270 kJ/kg as it leaves, then the enthalpy change is 270 – 250 = 20 kJ/kg. Read about isobaric, isochoric, isothermal, and adiabatic processes of ideal gases (gases that can be described by the ideal gas equation) and how the ideal gases can do work or release/absorb heat. The compression and the compressor ratio, both are directly proportional. OPTIONAL DATA. Isentropic Flow Relations Perfect Gas, Gamma = , angles in degrees. Before you begin, you'll need to have some information on hand. Check to learn more. The compressor capacity is essentially determined by the total nominal compressed air requirement. Let our reciprocating air compressor buying guide walk you through the selection process. Sep 29, 2023 · Air compressor energy consumption varies with size and efficiency. The “atmospheric” air in the tank is 90/15 * 0. If you find any errors kindly email us To calculate the compression ratio of an engine, use the following formula: compression ratio = V d + V c V c. The compressed volume is the same in both static and dynamic compression. The efficiency of the compressor must be taken into consideration and is equal to 0. 9 kW, while larger 100 HP compressors can consume 75-95 kW. Vd is the displacement volume of the cylinder, or the volume displaced by the piston from the start to the end of the stroke. If a compressor uses 500 Watts of power and runs for 30 minutes, the energy consumed would be calculated as follows: \[ E_c = 500 \times 30 \times 60 = 900,000 \, \text{Joules} \] Importance and Usage Scenarios. 8 kW. Unlock the power of compressors with our free online Process Engineering Handbook. The numbers you see on the knob are the ratio of input as well as output. Find the best size and capacity for your needs with Atlas Copco. 72 = 216. (this is because atmospheric pressure is 15 PSI give or take (it’s 14. Take your cfm, maximum pressure, motor characteristics, and receiver size requirements to Oct 10, 2023 · Choosing a compressed air pipe size depends on factors such as the required flow rate (in CFM), the length of the pipe run, and the allowable pressure drop. 50. An anonymous contributor provided the following insight regarding a compressor CFM calculator at different pressures. V_d V d. It is approximately the energy needed to heat one pound of water by 1 degree Fahrenheit. This 1. (k) Reciprocating Compressor Rating estimates capacity, power required for compressing a gas mixture from an Inlet Pressure to Desired Outlet pressure for a given cylinder diameter, rod diameter, stroke length and RPM. To calculate the CFM of an air compressor, you will need to determine the compressor’s SCFM (Standard Cubic Feet per Minute) and adjust it based on the pressure and temperature of the air. Load and unload period (loading time + unloading time) Example: In case of SGIV, t1+t2 ≧ 0. ) Next, estimate an Ariel compressor configuration that fits your needs. You can adjust the values in the table to reflect the specific characteristics of your compressed Aug 24, 2022 · To complete our combined gas law calculator, we need to introduce the adiabatic processes. The calculated reserve capacity is primarily determined by the cost of lost production resulting from a potential compressed air failure. Use the calculator tool to work out the units of measures for your applications. 696 PSI) – and “90 PSI” above atmospheric, is 6 x 15) But we’re storing at 180 PSI…. The British Thermal Unit, or BTU, is an energy unit. This calculator needs your engine capacity & your desired boost pressure in PSI at your desired RPM. Critical Temperature (Tc) ° C. Calculate your Engine's Compression Ratio Here. Example: To determine the deck height required for a 2332cc engine with a compression ratio of 9. The anonymous contributor is not certain of the pinpoint accuracy of his formula. Vca = Q / (60*pi* (d/24)^2) V ca = Q/(60 ∗ pi ∗ (d/24)2) Where Vca is the compressed air velocity (ft/s) Q is the air flow rate (CFM = ft^3/min) d is the diameter of the pipe (in) To calculate the compressed air velocity, divide the flow rate by the result of 60 times STEP IV - Selecting the Proper Compressor. ) Stroke (in. Ingersoll Rand manufactures a large variety of air compressors for commercial and industrial uses. 18 kg/s x 20 kJ/kg = 3. Pump-up time. The simplified one is the following, for 1 compressor stage of a perfect gas, the isentropic compression is : Nov 12, 2023 · Speed Ratio ( SR): The calculated result representing the ratio of the motor speed to the compressor speed. Determine air compressor motor compatibility: You air compressor’s motor must be compatible with the available power supply at the facility or job site. For this example, the compressor is supplying 20 kWh. Enter your desired engine parameters to figure out your Compression Ratio, Deck Height, Combustion Chamber CC, or Displacement. Each rod is fitted with two sets of packing to separate the cylinder area from the crankcase to seal the compressed product in and prevent oil contamination. If you’re working in a Dec 26, 2018 · First, let’s assume the air tank is 15 liters / 0. The compression ratio represents the ratio of the maximum volume to the minimum volume inside the engine’s combustion chamber. In MyEngineeringTools page dedicated to compressor power calculation, there are 2 formula given, a general formula, and a simplified one. t1+t2=. If you want to see what a sample. This formula suggests a correlation between the tempo of a track, measured in beats per minute (BPM), and the release time setting of a Horsepower Calculator. The ratio ranges of the compressors are generally expressed in Jul 31, 2023 · The following equation is used to calculate the Compressed Air Velocity. Ti is the Inlet Temperature in °C. If the compressor for natural gas that you require falls outside of the parameters of this sizing program, please contact a gas Contact Quincy Compressor: Phone: (251) 937-5900. Static compression ratio (SCR) is the fixed ratio of cylinder volume at bottom dead center (BDC) to top dead center (TDC), while dynamic compression ratio (DCR) accounts for camshaft timing and valve events, providing a more accurate representation of an engine’s effective compression during operation. To simplify this calculation, you can use a compression ratio calculator, which allows you to input the necessary measurements and automatically computes the compression ratio for you. 5 Cubic Feet @ 90 PSI. The formula is: CFM = (Displacement in cubic inches) / (Compression ratio x RPM x 1728). CFM of compressed air required to raise a known system pressure to a desired system pressure:C2 = Required CFM total C1 = Existing or known CFM P2 = Desired pressure P1 = Known Pressure EXAMPLE: A 75 HP Compressor rated at 320 CFM t 125 PSIG will hold only 85 PSI and we desire 125 PSI. 502 psi barometric pressure) Fuel Type. 39 CFM to raise system pressure to the desired level. If you have any questions about a specific application or would like a more in depth review Feb 29, 2024 · The compression ratio can be easily found with the following formula: \textrm {CR} = \frac {V_d+V_c} {V_c} CR = V cV d + V c. 75-1. Jul 1, 2015 · A rigorous calculation based on an equation of state and a shortcut method are considered and the results are compared. Payback Estimator. toolbox2 is a web-based platform that provides various tools for dispersion calculation and pulse compression. You can use the prismpair tool to design and optimize a two-prism compressor for your ultrafast laser system. SUMMARY HD362-B Single-stage, nonlube, ductile iron gas compressor fitted with Buna-N O-rings and iron valve gaskets. We've included questions below to help guide you. P poly = (n*Z*R'*T 1 )/ (n-1)* [ (P 2 /P 1 Calculate the capacity (cfm) for your air compressor with just 4 easy questions. Round this amount to the same amount of digits as the original and then the stapler will require 0. Once you determine the CFM you need, take that figure times 1. Note: For pistons BELOW the block @ TDC – value in box must be a NEGATIVE number (-0. Determine the CFM requirements of each application that you intend to run on your air compressor. ) STATIC COMPRESSION RATIO. If you have a more robust air compressor with a CFM of 10, the fill time is halved to 4. 39 Total CFM requiredWe need an additional 128. Southampton). The following equation is used to calculate the polytropic compression power required for the centrifugal compressor to bring 2000 m3/h or air at 20c to 6 bar g. They can only be determined (afterward) by a compressor test, although compressor manufacturers can usually provide good estimates. To calculate the CFM of your air compressor, you should first determine the tank size and pressure rating of the compressor. Sep 24, 2023 · Cost per Cubic Foot of Compressed Air = $3,000 USD/year / [ (100 cfm) x (100 psi) x (250 days/year)] = $0. The Compression Ratio Calculator is a tool used to determine the compression ratio of an internal combustion engine. The following calculation method uses the Gas Processors Suppliers Association Engineering Data Book Eleventh Edition, FPS Version, 1998, eq 13-4 developed for large slow speed (300-450 RPM) compressors with SG = 0. The receiver stores compressed air and minimizes the loaded run time of the compressor. Apr 24, 2024 · Example of Dynamic Compression Ratio Calculator. A free unit conversion calculator for all your compressor related calculations. Apr 12, 2023 · The CFM of Air Compressors can be calculated using the Ideal Gas Law to provide an approximation. Compression Calculator Simply fill in the form below to calculate your compression ratio ;> Bore: (diameter) in. is the displacement volume – the volume that has been swept by a moving piston. Calculating static compression is simply the ratio of the total volume in the cylinder at bottom dead center (BDC) to the compressed volume at top dead center (TDC). The formula to calculate the CFM is simple: CFM = SCFM x (psia / 17) x (Tamb + 460 / 530). 000) Note: For pistons ABOVE the block @ TDC – value in box must be a POSITIVE number (0. 4-1)* (236. Displacement is the volume of air displaced by the compressor’s piston during one revolution, measured A free unit conversion calculator for all your compressor related calculations. Simple Energy Formula: Motor Efficiency = Cost per KW X . The air compressor has to provide enough pressure to perform a given task (in this case it was to move a wooden block). Nov 14, 2023 · The formula for calculating CFM (Cubic Feet per Minute) for air compressors is commonly given as: CFM=Displacement×RPM2542CFM=2542Displacement×RPM. Compression (static) Calculator. Energy Saving calculator. Click here to download Quincy Compressor Pump Up Calculator. Oct 4, 2017 · Keep in mind that the majority of single-phase air compressors offer a maximum pressure rating of 135 psig, while most two-phase compressors top out at 175 psig. The formula for an adiabatic compression (or expansion) is: Dynamic compression. Desired operational pressure. Conclusion: Compression ratio is a fundamental concept in the world of internal combustion engines, with significant implications for performance, efficiency Let’s use the CFM calculation formula to see if we get the same number (this is the very formula used in the calculator): CFM = (Area x Height x ACH) / 60. Bore - Engine Bore in Inches. If we input the figures from our example, we get: CFM = (1,000 sq ft * 8 ft * 4) / 60 min = 533 ft3/min = 533 CFM. For example, a pneumatic wrench will operate on as little as two and a half CFM. 4 STEP 4 : calculate the polytropic compression power of the centrifugal compressor. . P1 = Known Pressure EXAMPLE: A 75 HP Compressor rated at 320 CFM t 125 PSIG will hold only 85 PSI and we desire 125 PSI. Contact Solar Turbines if a gas turbine product does not align with your project needs. Use the formula given above : P is = 2. In aircraft design and engineering, the "Isentropic Work Done" represents the work required or done during an idealized (isentropic) compression process within a compressor. We will compare the rigorous method results with the values from the short cut methods. Using the formula above, the COP is calculated to be: COP = | Q | / W. Most applications require between two and 13 CFM. Gain insights into reciprocating and centrifugal compressors, temperature rise, power requirements, polytropic compression, and more. The initial pressure is about 40 PSI, whereas the maximal pressure is 120 PSI. The rigorous method is based on an equation of state like the Soave-Redlich-Kwong (SRK) for calculating the required enthalpies and entropies. 7 minutes. mm Cylinder Head Volume: cc in. Below is a description of each field of data -. 4/ (1. It outputs the pressure ratio, lbs/min and CFM numbers which can then be plotted onto turbo compressor maps. Use the Solar Turbines gas compression and power calculator to estimate your compressor plant power needs to improve Simply input your suction and discharge pressures and flow requirements into Ariel Quick Size to get an estimate on needed horsepower or flow (based on user preference. Small compressors should be used with an air receiver, or storage tank. 2 multiplier is generally accepted as a standard due to the 6. Applying our formula gives: DCR = ( (500 cc + 50 cc) / 50 cc) × 10 = 110. To use this calculator, you need to input the following information: Tank size. Jun 10, 2019 · Step 1: Determine CFM Requirements. How many CFM is a 60 gallon air compressor? 2. Common Pontiac Engine Displacements : (click the button for that bore and stroke for each engine) Click the following to add to the bore size. You can calculate it according to the cylinder volume formula: V d = 1 4 ⋅ b 2 ⋅ s ⋅ π. Then, you need to measure the PSI, or pounds per square inch, and determine the correct conversion factor to convert PSI to CFM. 7. 6 kW. Fill out the required fields and you will see the magic. 033 / 90 * 100 = 0. Conical Shock Relations Perfect Gas, Gamma = , angles in degrees. Calculating your air compressor CFM allows you to objectively assess the efficiency of the compressor. This table and calculations provide you with an estimate of the annual compressed air cost based on the given parameters. 1 BTU = 1,055 joules, 252 calories, 0. Suction (psig): Discharge (psig): Flow : Calculate Size. Below you'll find a variety of calculators intended to provide assistance with energy savings, measuring on-site conditions and determining equipment specifications. Accentric Factor (ω) Molecular Weight. 2, we derive the required rating for the dryer. 5 AIR COMPRESSOR DIGITAL ASSISTANT. Sep 28, 2023 · The formula for calculating compression ratio is: Compression Ratio (CR) = (Cylinder Volume at BDC + Clearance Volume) / Cylinder Volume at TDC. In short, we get the same number. Get the answers you need to your compressed air questions at Ring Power ACG. Single Turbo Twin Turbo. 04 CID) Ambient Air Temp (deg F) Altitude (ft above sea level) (14. Contact Solar Turbines for details on your specific project or application. This example shows how changes in the swept and clearance volumes can significantly Jul 28, 2023 · The compressor fill time can be calculated using the formula: Fill Time = (Tank Volume × (Final Pressure – Initial Pressure)) ÷ Compressor Flow Rate. Use the Formula: Apply the formula Ec = CP * T * 60, where: Ec represents the compressor energy consumption in joules. Discharge temperature based on eq 13-18 assuming 130 Deg F inlet and k of 1. min. 4 days ago · This combined gas law calculator is a great tool to deal with problems related to the most common transformations of gases. Effective D Aug 15, 2023 · CFM (Cubic Feet per Minute) for an air compressor is calculated by considering factors like the compressor’s displacement, compression ratio, and efficiency. By multiplying the compressor output (in CFM) by a factor of 1. Compressed Air vs. 03666666. Elevate your understanding with practical guides and free calculation tools. in. This is a calculation example for determining rough estimate of required receiver tank capacity. Compression Ratio Calculator. It is important to understand what pressure is needed in order to size the compressor properly, otherwise Compression Calculator. 4 minutes. Currency ($, £, €) Estimated Energy Cost. Our HVAC energy calculators includes convenience store calcutlaor, refrigeration lifecycle energy tool and energy savings calculator. 0. 31*1. Here are some general guidelines: Determine your required CFM: Calculate the total CFM your system needs to operate all connected devices simultaneously. Electric Motor Drive (EMD) solutions are also available. 1 day ago · \(V_c\) is the compressed volume (the volume of the combustion chamber when the piston is at top dead center). Rod Length (in. The compressors' free output flow rate should cover this rate of air consumption. It is typically measured in cubic feet per minute (CFM) or 1. Pressure drop in compressed air pipelines with applied pressure 50, 100 and 150 psi. Calculate your compressor's cubic feet per minute. Small 1-2 HP compressors typically use 0. Find Your Compressor. Compressor capacity results are calculated in cfm and based off an atmospheric pressure of 14. inch metric. However, you may still need to calculate it for older compressors. The cylinder volume at BDC can be estimated as the swept volume of the cylinder (cylinder bore area times stroke length), and the clearance volume is the volume of the combustion chamber when the Jan 18, 2024 · Suppose the Evaporator Capacity is 5000 BTU, the Compressor Capacity is 7000 BTU, and the Compression Ratio is 3. Vc is the clearance volume of the cylinder, or the remaining space left when the piston is at the end of the Gas Compressor Calculator. where: V d. This calculator is designed to provide you with a basic compressor estimation: such as appropriate RIX compressor model, estimated power consumption, as well as how many compression stages you will need for your process conditions. Hours. Calculating air compressor CFM is complex. M is the Molar Weight of Gas in grams per mole (g/mol). The dynamic compression ratio is similar as it is the ratio of volumes. 5. ) Number Of Cylinders: Bore: Deck Volume (cubic in. Where: P represents the Centrifugal Compressor Power in kilowatts (kW). These values are approximate and depend on factors like compressor type and operating conditions. As said before, an adiabatic process is a thermodynamic process where pressure, temperature, and volume all change, but there is no heat exchange with the environment. Type: Skid Mounted Portable. Countless online resources and mixing “gurus” advocate a seemingly straightforward formula: 60000 divided by the tempo equals the release time in milliseconds for an audio compressor. How long does it take a compressor to fill with air? Jun 9, 2023 · The compressed air dryer sizing calculator employs a straightforward formula to ascertain the minimum dryer rating essential for a specific compressor output. 412 BTU per hour. 000) Feb 28, 2024 · This turbo size calculator gives the numbers you need to analyse turbo compressor maps so you can find a good turbo for your engine. This calculator will compute static compression ratio, commonly just called compression ratio. Air Compressor Energy Consumption Calculator Compressor The air compressor has to provide enough pressure to perform a given task (in this case it was to move a wooden block). By entering values for motor speed, compressor speed, and pulley size for the compressor into the calculator and clicking the “Calculate” button, the calculator determines the pulley size for the motor and the speed ratio. The following sections will define CFM and cover 1. Drive: Engine Electric. Displacement (Liters) (122. It only takes a few seconds. Hence, the capacity Q = m x h = 0. Ariel Quick Size estimates the required stages, bore sizes, discharge temperatures, and rod loads needed Air Compressor Calculations & Efficiency Formulas . A compressor’s CFM can be calculated by multiplying the compressor’s displacement (cubic inches of air pumped per revolution) by its motor RPM (revolutions per minute) and dividing that Speed-Wiz can display turbocharger compressor flow maps and calculate flow rates and pressure ratios and plot them on the compressor map. 050 lift plus 15 degrees. Mobile Power. Several compressor maps are included, and it's easy to add your own compressor maps as shown below. where: CFM is the Cubic Feet per Minute, which represents the volumetric flow rate of air. 7. Proper sizing and maintenance can help optimize energy efficiency. At low pressure, Z is assumed to be equaled to 1 here. 25 and use that total CFM to choose your compressor. 6 kilowatts of refrigerant power under the given Example Calculation: If you don't have the specs for air consumption at a different psi divide the known amount by the given psi and multiply this amount by the psi you will be using. Suppose you have an engine with a displacement volume of 500 cc and a compressed volume of 50 cc, the compression ratio is calculated as follows: \[ CR = \frac{500 + 50}{50} = 11:1 \] Jul 27, 2023 · First, determine work or power supplied by the compressor to the heat pump. li vc aq az kr ee qq nv js nh