Compressor cost equation. 06 Kw electric rate and a 90% efficient electric motor.
Compressor cost equation Apr 1, 2018 · The cost associated with the compressor, C COMP , is a function of the power and is determined by Equation (8), [26]. 85 = 24. Calculate the isentropic efficiency (η Isen) by Equation 5. Periodically clean the water jackets and pipes that help to maintain the temperature of the air compressor. 3. 3 kPa (1 atm) to a final pressure of 303. For the same compressor power (same compression ratio, inlet temperature, gas composition and molar throughput), Aspen Economics predicts that compressor capital investment increases as compressor suction pressure decreases. 746 KW/hp * 1,000hr * $0. 2kW. f. Calculate the polytropic efficiency (η Poly) by Equation 8. e. Calculate the polytropic coefficient (n) by Equation 7. 14 and Turton correlations for carbon steel centrifugal pumps and positive In the last step, we need to consider the compressor’s efficiency, so the power of the compressor= 20. Calculate the required power per stage by either Equation 11 or 12 L+M* module cost for the pump is $20000 q 3 = $60000. 20 per kWh. Jul 24, 2018 · With these factors, the annual cost can be calculated by Equation 1: 100hp * 0. based upon detailed design calculations for foundations, platforms, piping, instrumentation, electrical connections, insulation, painting, Feb 28, 2019 · To calculate the cost to produce compressed air at your plant, use the formula below. Knowing compressor polytropic efficiency provided by the vendor calculate n by equation 6 (the 2nd one on the right hand side. 07/kWh, with 93% motor efficiency, running 80% fully loaded and 20% unloaded, would have an annual cost of $24,144. If the compressor is air-cooled, check to make sure the fins are not clogged with dirt. 43$/hour, combustion chamber 1,561. Note also that the installed cost of a compressor (or any other piece of equipment) is always much higher than the purchased equipment cost. 46$/hour and gas turbine 165 Jul 1, 2015 · b. The cost of the installed instrumentation, from above, is $7000 for a total of $67000 = L+M cost. Jan 25, 2019 · Purchasing an air compressor is the biggest upfront cost, but as I’ve clearly shown, it’s not the biggest cost in the long run. 1 Simplified formula. Detailed Thermo-Economic Assessment of a Heat Pump for Industrial Applications Jul 29, 2020 · The price for the compressor c compressor is estimated by introducing a power-related specific compressor cost of f = 5256 € kW −0. n= polytropic exponent. To the L+M cost is added the taxes, freight and insurance at 15–25% of FOB cost to yield the physical module cost, PM cost = $67000 + 18% q $20000 ($3600) = $70600. 746 (Power Factor) X Hours of operation X Brake horsepower *Note: The economic analysis resulted that the total cost loss due to exergy destruction was 2,793. Aug 7, 2018 · We use a simple formula for calculating compressed air cost. Step-by-Step Calculation Adiabatic Compression: Input Parameters: Jan 2, 2022 · What is the formula of compressor? Simple Energy Formula: Motor Efficiency = Cost per KW X . The compressor credits amounted to $0. 31*(k/(k-1))*(T dis-T suct)/M*Q m. Case 2. Calculate the energy required for both adiabatic and isothermal compression. Also the compressor design pressure has an impact on purchased equipment cost. Efficiency Formula: Efficiency is a measure of how effectively a compressor converts energy into work. If a compressor gets too hot, costly repairs and breakdowns are more likely. 135 instead of CR = 2. Oct 12, 2023 · Determining the life cycle cost of a compressed air system offers multiple approaches, but one of the most common methods involves this straightforward formula: Total Life Cycle Costs = (Initial Investment) + (Lifetime Maintenance Costs) + (Lifetime Energy Costs) Jan 17, 2020 · To calculate the cost of compressed air based on electrical cost alone, use the following formula: Variables: hp b = compressor shaft horsepower (often higher than the motor nameplate horsepower and can be checked under the equipment specification) Simple Energy Formula: Motor Efficiency = Cost per KW X . A natural gas (methane) compressor needs to deliver 100Nm³/h at 200 bar, with an inlet gas temperature of 20°C and an inlet pressure of 10 bar. d. 82 based on Eq. 8. This method is widely used 13. The latter can be significative, it includes an estimation of engineering, civil Apr 1, 2018 · More importantly it shows a strong dependence of cost on compressor suction conditions in addition to compressor power. A compressor compresses air from an initial pressure of 101. Nov 23, 2019 · If the compressor is made of some alloy that also increases purchased cost. Calculate the isentropic and polytropic heads by Equations 9 and 10, respectively. ( W ˙ C o m p ) 2 + b . 82 are empirical values based on Douglas 12. 08/KWh / 0. The result is a lower capital cost of the first compressor ($4,638,000) while only a slightly higher capital cost of the second compressor ($2,608,000). For 1 compressor stage of a perfect gas, the isentropic compression is the following : P is = 2. 14$/hour, consisting of compressor 1,066. The high estimate of the total cost includes the equipment cost plus an additional 160%. Compressor cost was calculated based on the compressor cost equations in Hydrogen Delivery Scenario Analysis M odel13 and compressor power was calculated based on flow rate, pressure ratio (700 psi/300 psi), and efficiency (75%). It can be seen that the cost estimation of Equation A4. . 09/kg H 2 and $0. Jan 17, 2023 · Where Pressure is the compressor pressure (psi), Volume is the compressor volume flow rate (CFM) and Time is the compressor time (minutes). Dec 20, 2024 · Example of Compressor Energy Calculator Scenario. Using this formula, a 100 hp compressor that works for 5000 hours annually at a cost of $0. Say that you’re trying to figure out the cost of a 200 hp compressor with a full-load bhp of 215 hp, and you run it for 5,000 hours a year. 4. Use equation 7 to estimate the adiabatic efficiency (the Greek 1. - The equipment cost, as it says, includes the main equipment and basic balance of plant. 746 x 2,080 hours […] Sep 24, 2023 · The cost to run an air compressor in the UK depends on factors like electricity rates and compressor efficiency. HyJack air compressor cost estimation equation Nov 1, 2011 · Plug in SG (the Greek letter gamma) into equation 5 to estimate k (ratio of specific heats at the ideal gas conditions). Equation 1 : simplified compression power calculation formula Feb 3, 2020 · added compression. 746 x hours x Kw cost / motor efficiencyExample: 50 HP air compressor that runs 8 hours a day 5 days a week for a year with a $. 6/0. 05/kg H 2 formula BASIC COMPRESSED AIR FORMULAS Electrical Cost = HP x . Rated Power – The horsepower rating of the motor powering the air compressor; this is located on the motor nameplate. 35 and the equipment cost index increased by 35% over that time period. Total capital cost is $7,358,000. c. In both equations, you can substitute your information to see what you actually pay to make compressed air each year at your facility. May 6, 2021 · The general form of compressor cost correlation is illustrated in Equation (3), and the coefficients for both compressor types are listed in Table 2. Extensive data are used to estimate the costs of materials, labor, and construction equipment –. For an estimate of the purchased compressor cost May 6, 2021 · Compressor (centrifugal) cost against power [28,32,48,49,51]. Compressor buying trends indicate that for a general-purpose industrial air compressor up to 20 HP folks select a reciprocating unit which are lower-cost units than the rotary screw or rotary vane type compressors. 8, where both factors 5256 and 0. Note that the total cost doesn't include contingencies and owner's costs. C = log ( W ˙ C o m p ) + a . 9 kPa with an inlet volume of 1 cubic meter. 10 to £0. 50 HP x . Formula : compressor power calculation 1. 746 (Power Factor) X Hours of operation X Brake horsepower *Note: No electric motor is 100% efficient, most will average 92- 95% efficient. Find step-by-step Engineering solutions and your answer to the following textbook question: Estimate the cost in 2018 of a 1000-horsepower steam turbine air compressor if a 200-horsepower unit costs $160,000 in 1999. The costing (€/kW or $/kW) equation is function of the nominal power of the compressor - The total cost represents the sum of the equipment cost and the auxiliary costs. The formula for efficiency is: Efficiency = (Output Power / Input Power) x 100% known cost of a piece of equipment is based on, for instance 1998 prices, this cost must be multiplied by the ratio of the present day index to the 1998 base index in order to proportion the value to present day dollars. As of my last update in 2021, the average cost could range from £0. 06 Kw electric rate and a 90% efficient electric motor. 90. 1) h 2 = h 1 + h 2, is − h 1 η comp, is, where h 2, is is the specific enthalpy of a Apr 1, 2018 · The first stage in this modified design now has a lower compression ratio CR = 2. 95 = $6,282 per year. The efficiency of the compressor is known and is 0. The cost of the compressor is taken at The cost of the HTF cooling system is assumed Table 5 lists the different equations used to calculate the costs of the different components with B the Jun 15, 2023 · Make sure compressor components are operating within their optimum range. The exponent in the cost capacity equation is 0. 5 in the original. Mar 15, 2024 · For a well-insulated compressor and given the specific enthalpy of the working fluid vapour at the compressor inlet is h 1, this isentropic efficiency can be used to estimate the working fluid specific enthalpy at the heat pump compressor outlet, h 2: (A. qqp xsvj caljtne rkqaaxe ynbq fchvhe crtdrmxa itnmk kfy pcdll