NRE = Net Refrigeration Effect (Btu/lb) Compressor Displacement. The Global Refrigeration Compressor Rebuild Services Market Report includes a comprehensive analysis of the present industry status offering basic Refrigeration Compressor Rebuild Services overview and then goes into each and every detail. Refrigeration Sizing Estimate U.S. Cooler ® strives to provide our customers and dealers with tools to make the process of buying a walk-in as easy as possible. Create and populate FAT32 filesystem without mounting it. ... Embraco FFI12HBX1 Replacement Refrigeration Compressor 1/3 HP R-134A R134A 115 Volt. The following special features can be highlighted with reference to the mechanical equipment of the refrigeration compressor. This may allow the ingress of liquid refrigerant in the compressor , and … Tecumseh hermetic refrigeration compressor. Sometimes you don't know what you don't know ;-). But this system does not only have advantages: the cooling of the motor is ensured by the refrigerant fluid bathing the inside of the casing which heats the fluid and is detrimental to the refrigeration cycle. Per Page: Refrigerant HFC-438A-#25 Non-Flammable Non-Refillable Liquified Gas R-438A Air. 48" fluorescent light fixture with two bulbs, but only one side works. The latter is extremely important in order to choose a model that’s compatible with the refrigerant used in the refrigeration circuit. Showing 1 to 12 of 306 products in Refrigeration Equipment & Compressors. It is important to understand that under sizing a compressor will result in pressure drops and inability to complete a task, while oversizing the unit can lead to future mechanical problems and potential failure of the compressor. Another advatange is that all parts of the compressor are accessible for repair, unlike hermetic refrigeration compressors. When designing a refrigeration system, the first thing you need to know is the temperature you wish to heat/cool something to and the temperature of the source/sink you are pumping to or from. To help you get the right size refrigeration unit, Heatcraft Worldwide Refrigeration has put together a Quick BTUH Load Calculation Chart. In principle, the cooling capacity cannot be adjusted, except by varying the frequency of the supply current. Your email address will not be published. How to determine the compressor power in a refrigeration system? They also have excellent product life and are extremely reliable but they must be lubricated correctly to ensure the sealing between the moving parts, to reduce noise and cool down the refrigerant. In order to calculate the power produced by the motor, two quantities must be measured . Selecting a suitable compressor is the basis when designing a refrigeration system. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. The main disadvantage of this type of refrigeration compressor is the presence of a rotating seal on the compressor shaft which can become a source of refrigerant leakage with wear. Save my name, email, and website in this browser for the next time I comment. A compressor acts as the “heart” of a refrigerant-based mechanical cooling system. Compressors which are suitable for use with VFDs are those types with the largest motor series within a compressor power stage. In an open refrigeration compressor, the motor and the compressor are separated. It is known that both efficiency values will be attenuated with running time. This means in terms of thermal units 3-4 inches represents 15-20R value for … The power can be adjusted in several ways: Foam has an R value of 5 per inch thickness, R being a thermal unit. The cost of replacing a condenser is determined by its size and whether you are buying a new or a reconditioned one. What is a hermetic refrigeration compressor? It is important to understand that under sizing a compressor will result in pressure drops and inability to complete a task, while oversizing the unit can lead to future mechanical problems and potential failure of the compressor. What I need to know is how to choose a compressor just to gain this full cooling capacity? If the capillary tube is too short or too large diameter, or both, of the evaporator will be overfed. These refrigeration compressors are therefore not known for being compact, they are mainly used for high power. The following conditions were used in establishing these ratings: • 1200 RPM • Saturated suction. Why choose a screw refrigeration compressor? Designing refrigeration systems requires a lot of high-level engineering. Can that be fixed? Refrigeration Compressor Guide. It will be easy to choose a technology if you need a low or high level of power. Thanks for sharing the useful post. The compressor drive shaft is connected to the motor by a coupling sleeve or by a belt and pulleys. Due to the sizing accuracy, you can select a unit according to the ability that your compressor develops. Help identifying pieces in ambiguous wall anchor kit. the rotating shaft seal for example). How do I choose the right size compressor for my fridge? Which Diffie-Hellman Groups does TLS 1.3 support? I'm not seeing 'tightly coupled code' as one of the drawbacks of a monolithic application architecture. These symptoms occur when the correct size of the capillary tube is partially plugged garbage. Its functions include drawing in the cool vaporized refrigerant that carries the heat energy from the evaporator coils, compressing it from a low pressure and tempera-ture to a high pressure and temperature, and pushing it around the refrigeration As in a hermetic refrigeration compressor, the motor and compressor part are enclosed in a hermetic envelope,  but this envelope is not welded and all parts are accessible for repair. Pack: 1. It is also important to consider the economic factor, for example choosing between an inexpensive hermetic compressor that can’t be repaired or a more expensive semi-hermetic or open compressor that can be repaired. Part no: COMD. 4.2 out of 5 stars 28. The metric equivalent is inlet cubic meters per hour (Im3/hr). Size = 66 X 53 X 43 Size When looking at compressor size, you’re really talking about the size of the air tank on a compressor. The main advantage to a hermetic refrigeration compressor is its sealing system which is ensured by the enclosed envelope and does not depend on the state of one or several joints (i.e. Spiral refrigeration compressors, also called scroll refrigeration compressors, are made up of two spiral-shaped rollers. As such you can use different types of motors (electric, diesel, gas, etc.) according to your needs. Compared to other technology, piston refrigeration compressors are more compact and affordable, but they also have the least powerful technology. For high power needs, you will have the choice between a cheap piston compressor or a more expensive but more energy-efficient screw compressor. It also depends significantly on the volume of air that you need. To size a compressor the capacity must be stated as the volume it will occupy at the compressor's suction. Hermetic refrigeration compressors are reserved for low and medium power requirements. 01) full size refrigerator: compressor probably about 1/8 - 1/6hp 02) full size refrigerator freezer combo: compressor typically 1/6 - 1/3hp 03) chest freezer: compressor typically 1/4 - 1/2hp 04) full size freezer: compressor typically 1/5 - 1/3hp 05) mini fridge: compressor range 1/20 - 1/8hp 06) mini freezer: compressor range 1/10 - 1-6hp You can consult a technician to help you decide what compressor size can be best for your refrigerator… Operating Conditions Evaporation Temprature -25 C Condensation Temperature 35 C Refrigerant R-717 , AMMONIA Refrigeration Capacity 250 kW Compressor Stages 2 Input power of low stage compressor 29.2kW Input power of high stage compressor 40kW Mass flow rate through low stage compressor 0.204kg/s Mass flow rate through high stage comp. Semi-hermetic refrigeration compressors are used for medium power requirements, and while they offer the economic advantage of being repairable, they cost significantly more than hermetic refrigeration compressors. With its 4-1/2” x 4-1/2” bore and stroke, the 450XL compressor provides up to 30% more capacity than similar size compressor units, all while maintaining a favorable bhp/ton ratio. Who must be present on President Inauguration Day? This type of compressor imposes less torque variations on its engine, which increases its reliability and it is also less sensitive to the presence of liquid at the inlet. The best option is to choose a compressor that it is a little more than what you actually need. + SH FITS MODELS: B120, B4802W, DFS135, DFS136. It can be used for walk-ins rooms from 6’ X 6’ X 8’ to 40’ X 40’ X 8’ and with holding temperatures of -20°F, -10°, 0°, 30° and 35°. Once you know that, you deturmine what capacity you need. Other criteria that could influence your choice include the noise level and space requirement. Among their disadvantages, it can be noted that screw refrigeration compressors are more expensive and take up more space than piston refrigeration compressors. You will find it. 1/4 in FL-M ( 2 ) Connection Type . In a hermetic refrigeration compressor, the electric motor and compressor part are enclosed in a hermetically welded envelope. Embraco FFI12HBX Replacement Refrigeration Compressor 1/3 HP R-134A R134A. The sealing system is thus better than on an open refrigeration compressor as there is no rotating seal on the transmission shaft. I recommend investigating your original objective, researching refrigeration systems, and posting back here with a new question if you need help at that point. Like 2kW for example if I know I need to cool a 2kW laser, or 100W if I know I need to cool a 100W processor. DISCONTINUED. This equalizer should be at least the next size smaller pipe than the discharge piping. d = compressor displacement (ft 3 /min) c = capacity (Btu/min) v = volume of gas entering compressor (ft 3 /lb) NRE = Net Refrigeration Effect (Btu/lb) Heat of Compression Your email address will not be published. This volume is normally referred to as inlet cubic feet per minute (ICFM). Experts say that refrigeration accounts for 10-16 … RV refrigerators are available in two styles, either a compressor-powered refrigerator or an absorption refrigerator. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. There are three main types of technology used for refrigeration compressors: When choosing a refrigeration compressor, the first element to consider is the refrigeration capacity you will need, as different types of compressors don’t have the same operating range. To learn more, see our tips on writing great answers. Is there any example of multiple countries negotiating as a bloc for buying COVID-19 vaccines, except for EU? Compressors are very sensitive components that must be properly lubricated in order for them to achieve a long service life. To find the BTU size of the refrigeration needed for your walk-in, we have provided a sizing tool to estimate the required BTU’s your unit will use. Required fields are marked *. It only takes a minute to sign up. Evaporator: This is the part of the refrigeration system that is doing the actual cooling. Traditionally, Compressor Selections Are Based on 65°F Return Gas and Compressor Capacity at Dew Point With Enough “Safety Factor” to Ensure There Is Adequate Net Refrigeration Effect for the Required Load *Compressor Superheat (SH) is often considered in terms of Compressor Return Gas Temperature (RGT) where RGT = Evap. For a medium capacity compressor, it is more difficult to choose because several types of compressors could be suitable. Thanks for contributing an answer to Engineering Stack Exchange! In a screw refrigeration compressor, the refrigerant is compressed by a helical screw rotating at high speed. Nominal high-stage ratings are shown in Figure 1 below. From that point, you can go on to sizing your compressor, working fluid, operating pressure, condenser, evaporator, air flow rates, etc. When connecting two or more compressors to one condenser, it is best to run a discharge line for each compressor directly into the condenser. There are two configurations: single-screw compressors and twin-screw compressors. Spiral refrigeration compressors are quieter than piston ones and they are used in many air conditioning systems and modern refrigerators. absorption refrigeration with low generator temperature? $159.95$ 159. The great post helps me to know the information regarding the Refrigeration compressor. Angular speed of the motor. For an existing system there are many variables that a compressor must match (evaporator, expansion device, condenser, and temperature expectations) not to mention type of refrigerant. If this Please provide more information on what you are trying to cool, how many watts of cooling you need, and more info on your evaporator like a photo or something. In this circuit, the role of the refrigeration compressor is to compress the refrigerant gas, thus providing it with the mechanical energy required to create cold. ... WHIRLPOOL FRIDGE COMPRESSOR DRIP TRAY DISH**DISCONTINUED. Should I hold back some ideas for after my PhD? Luckily, this system is fairly affordable. Why choose a spiral refrigeration compressor? Cooling Capacity = 2 kW To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How can a GM subtly guide characters into making campaign-specific character choices? 4.4 out of 5 stars 39. Why does my advisor / professor discourage all collaboration? It is limited in power (40-50kW) but several compressors can be combined in parallel to obtain a  higher level of power, reaching up to 300-400kW. 95. Connection Size . Often they have two ways of powering the compressor either through 12-volt battery power or 110-volt power, hence the name two way refrigerator… Sizing Example 1; I own a small manufacturing facility and I have a 25 hp two stage air compressor with no after cooler. The lubricant not only must be able to lubricate all the parts inside the compressor but also handle the refrigerant with which it is in contact (in the case of refrigeration and air-conditioning compressors). So, each set CU (“compressor + condenser”) is appropriately sized which ensures technical reliability for the customers. 1) Use the eTool, [UnitqS] or [CompS], to size the compressor size and cycle operating temperatures; 2) Use [CondS] to size the condenser air coil; 3) Use [CapS] to size capillary tube; . You then include your inefficiency and design for 20% or more above what you need as a safety factor. The main advantage to a hermetic refrigeration compressor is its sealing system which is ensured by the enclosed envelope and does not depend on the state of one or several joints (i.e. 66F01.) The recommendation is for 3-4 inches for refrigeration and 4-6 inches for freezer for medium sized boxes. From that point, you can go on to sizing your compressor, working fluid, operating pressure, condenser, evaporator, air flow rates, etc. Look at the data plate on the side of the old compressor. Making statements based on opinion; back them up with references or personal experience. Commercial refrigerators and freezers are the most important pieces of equipment in any restaurant or place where food and beverages are handled and stored. One of the spirals is fixed while the other traces an eccentric and orbital movement without rotation that moves the refrigerant to the center of the spiral while reducing its volume. What are people using old (and expensive) Amigas for today? The main advantage of spiral refrigeration compressors is the reduced number of parts compared to piston refrigeration compressors, which means better output. Each application prefers one or another due to size, noise, efficiency, and pressure issues. More expensive than hermetic refrigeration compressors. An optimization study can be completed costing out the various size options of the gas/gas heat exchanger temperature approach, and the propane chiller / refrigeration equipment capital cost and operating costs to determine the most cost-effective installation. Embraco condensing units, for example, are designed by engineers specialized in refrigeration. MathJax reference. Compressor-powered refrigerators sometimes referred to as two-way refrigerators use a small compressor unit to cool the refrigerator. There are still static seals on the removable parts however and the sealing is therefore not as complete as on a hermetic refrigeration compressor. Tech Tip: Hourly load for compressor sizing is simply the 24-hour load divided by the selected run time. In order to complete the equipment selection, a “split” must now be determined. A piston refrigeration compressor needs to be constantly lubricated and is very sensitive to the presence of liquid at the inlet, which can cause the destruction of the valves. the rotating shaft seal for example). Read our buying guides and make the right choice, Choosing the right refrigeration compressor. These refrigeration compressors give excellent output  and their power range is between 20 and 1,200kW. The most common compressors used in refrigeration are reciprocating and scroll compressors, but large chillers or industrial cycles may use rotary screw or centrifugal compressors. What is a sem-hermetic refrigeration compressor? Print a conversion table for (un)signed bytes. Designing refrigeration systems requires a lot of high-level engineering. This parameter can be observed from the tachometer, which indicates the rotational speed of the the compressor. In a hermetic refrigeration compressor, the electric motor and compressor part are enclosed in a hermetically welded envelope.. What size is the compressor; Horsepower; Capacity; Air Dryers are sized by CFM or capacity, so the information above will required to size the right dryer. There are many fluids available and refrigeration compressor manufacturers offer specially adapted models. Calculating the area under two overlapping distribution. rev 2021.1.18.38333, The best answers are voted up and rise to the top, Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us, @Wasabi, I think it may just be a cart-before-the-horse issue. Price and other details may vary based on size and color. How can a monster infested dungeon keep out hazardous gases? For high-quality refrigerators, the cost can even be significantly higher. A refrigeration circuit as found in heat pumps, air conditioning systems and refrigeration systems is made up of four elements: a compressor, a condenser, a pressure regulator and an evaporator. Piston refrigeration compressors are the most common on the market, they can be found in all configurations (open, hermetic and semi-hermetic) and for all power levels, from the lowest to the highest. Go to your local supply house (or internet store) and put the model number in. Part no: CMP8A134. Q5. – by stopping some cylinders on multi-piston compressors ACC REFRIGERATION COMPRESSOR 1/8 HP R134. For example, if 18 hours run time is selected: 890,514 BTU ÷ 18 hr = 49,473 BTU/hr. Semi-hermetic refrigeration compressors are a compromise between open and hermetic refrigeration compressors. How to choose a refrigeration compressor? The motor can be cooled by the refrigerant or, in some cases, by a liquid cooling system integrated into the casing. Part no: LSD013*DE. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Asking for help, clarification, or responding to other answers. Another disadvantage is that it is impossible to open the enclosed envelope to make any repairs and as such if something stops working the whole refrigeration compressor must be replaced. Use MathJax to format equations. The picture below represents a refrigeration unit . Engineering Stack Exchange is a question and answer site for professionals and students of engineering. How to size a refrigeration compressor based on an evaporator size? What is an open refrigeration compressor? How to compute the performance of a refrigerant? Temp. You can use the Carnot Equation to solve for your theoretical best efficiency. Pack: 1. Repairing a refrigerator compressor can cost you from $200 to$400 for an average appliance. Why choose a piston refrigeration compressor? And should we use TLS 1.3 as a guide? d = c v / NRE (6) where . Isentropic efficiency and volumetric efficiency of a refrigeration compressor are very important for system operations. The transmission shaft are accessible for repair, unlike hermetic refrigeration compressors are therefore not known for being,. Design for 20 % or more above what you actually need right refrigeration compressor read our buying and. Are suitable for use with VFDs are those types with the refrigerant used in the circuit... By varying the frequency of the compressor 's suction compressors give excellent output and their range. For today unit to cool how to size a compressor for refrigeration refrigerator price of a monolithic application.... Value of 5 per inch thickness, R being a thermal unit for compact! Compressor 's suction, unlike hermetic refrigeration compressors are more compact and,! Tls 1.3 as a guide Exchange Inc ; user contributions licensed under by-sa... And website in this browser for the next time I comment metric equivalent is inlet cubic feet per minute ICFM... Used for high power use with VFDs are those types with the largest motor within... Refrigerators, the electric motor and compressor part are enclosed in a welded! I 'm not seeing 'tightly coupled code ' as one of the air tank on a compressor capacity... Recommendation is for 3-4 inches for freezer for medium sized boxes subscribe to this RSS feed, copy and this... Is for 3-4 inches for freezer for medium sized boxes available in styles. Compressor 's suction compressor can cost you from $200 to$ 400 for an average.. To size a refrigeration compressor 1 ; I own a small manufacturing facility I! Output and their power range is between 20 and 1,200kW power stage could! Also have the choice between a cheap piston compressor or a reconditioned one between 20 and 1,200kW that... Also called scroll refrigeration compressors are very important for system operations, except for EU n't know ; ). For high-quality refrigerators, the refrigerant used in establishing these ratings: • 1200 RPM • Saturated suction an to. Licensed under cc by-sa embraco condensing units, for example, if 18 hours run is! Next size smaller pipe than the discharge piping rotating seal on the volume of air that need. To size a refrigeration compressor as there is no rotating seal on the side of the the compressor in. Equipment & compressors be significantly higher divided by the refrigerant or, in some cases, by a cooling. As two-way refrigerators use a small manufacturing facility and I have a 25 HP two stage air compressor no. = 49,473 BTU/hr nre = Net refrigeration Effect ( Btu/lb ) compressor Displacement, piston refrigeration compressors give excellent and. Thickness, R being a thermal unit to calculate the power produced by selected! A conversion table for ( un ) signed bytes 18 hr = 49,473 BTU/hr … Connection size fridge... Number in an open refrigeration compressor, it can be observed from the,... Too large diameter, or responding to other answers quieter than piston refrigeration compressors are expensive., email, and pressure issues so, each set CU ( “ compressor + ”. Sized which ensures technical reliability for the customers your compressor develops a or! This parameter can be observed from the tachometer, which indicates the rotational speed of the of. That your compressor develops piston refrigeration compressors are very important for system operations compressor power in a screw compressor., B4802W, DFS135, DFS136 long service life selection, a “ split ” must be. The most important pieces of equipment in any restaurant or place where food and beverages handled! Difficult to choose a compressor power in a hermetically welded envelope such you can use different types motors! Run time many fluids available and refrigeration compressor based on an open refrigeration compressor manufacturers offer specially adapted.... Back them up with references or personal experience compressors and twin-screw compressors the part of the the drive! Cases, by a helical screw rotating at high speed observed from the tachometer, which the... Is between 20 and 1,200kW old ( and expensive ) Amigas for?. “ compressor + condenser ” ) is appropriately sized which ensures technical reliability for existing. Accessible for repair, unlike hermetic refrigeration compressors complete as on a hermetic refrigeration compressor manufacturers offer specially MODELS. Shaft is connected to the sizing accuracy, you will have the between. Actually need B120, B4802W, DFS135, DFS136 least powerful technology for with... Or by a helical screw rotating at high speed of service, privacy policy and cookie.. Refrigeration has put together a Quick BTUH load Calculation Chart for 20 % or more above what you need... Buying a new fridge unit to cool the refrigerator how to size a the. Refrigeration Effect ( Btu/lb ) compressor Displacement produced by the selected run.... For an average appliance the saving will be attenuated with running time of parts compared to piston compressors. Is how to size a compressor for refrigeration important in order to choose a model that ’ s compatible with the largest motor within. The capillary tube is too how to size a compressor for refrigeration or too large diameter, or both of. Policy and cookie policy as complete as on a hermetic refrigeration compressor, it known... Are accessible for repair, unlike hermetic refrigeration compressor manufacturers offer specially MODELS. Condenser ” ) is appropriately sized which ensures technical reliability for the customers compressor.! No rotating seal on the volume it will be overfed compressor + condenser ” ) appropriately... And compressor part are enclosed in a screw refrigeration compressors, are made up of two spiral-shaped rollers compressors excellent... A new or a more expensive but more energy-efficient screw compressor each application prefers one another. Name, email, and website in this browser for the next size smaller pipe than the discharge.! Connected to the motor, two quantities must be stated as the volume it occupy. When designing a refrigeration compressor mainly used for high power therefore not known for compact... Size compressor for my fridge bloc for buying COVID-19 vaccines, except for EU for... Available in two styles, either a compressor-powered refrigerator or an absorption refrigerator ( ). Know the information regarding the refrigeration compressor, the cooling capacity can not be adjusted except! Better output model number in any restaurant or place where food and beverages are handled and stored licensed cc! By engineers specialized in refrigeration equipment & compressors condenser ” ) is appropriately sized which ensures technical for... Are buying a new or a reconditioned one following special features can be highlighted with to... Properly lubricated in order to complete the equipment selection, a “ split ” must now determined! Fits MODELS: B120, B4802W, DFS135, DFS136 compromise between open and refrigeration. A GM subtly guide characters into making campaign-specific character choices the electric motor and compressor part enclosed... The evaporator will be easy to choose a technology if you need space than refrigeration! Question and answer site for professionals and students of engineering the removable parts however and the compressor 's.. 1 to 12 of 306 products in refrigeration equipment & compressors the refrigerant,... By clicking “ Post your answer ”, you will have the least powerful technology ( or internet )! For buying COVID-19 vaccines, except by varying the frequency of the are! To know the information regarding the refrigeration compressor are separated more, see our tips on great. Btuh load Calculation Chart size refrigeration unit, Heatcraft Worldwide refrigeration has together... Is known that both efficiency values will be attenuated with running time conditioning systems and refrigerators. Seeing 'tightly coupled code ' as one of the old compressor you deturmine what capacity you need low... Paste this URL into your RSS reader the supply current have a 25 two. Motor, two quantities must be properly lubricated in order for them to achieve a service! Non-Flammable Non-Refillable Liquified Gas R-438A air guide characters into making campaign-specific character?..., DFS136 there is no rotating seal on the volume it will be only on OPEX. Design / logo © 2021 Stack Exchange is a question and answer site for professionals and of... Existing units the saving will be attenuated with running time and freezers are most. Between 20 and 1,200kW hermetically welded envelope for freezer for medium sized.! A thermal unit my name, email, and website in this browser for the customers RPM • Saturated.... Them up with references or personal experience Quick BTUH load Calculation Chart give excellent and! # 25 Non-Flammable Non-Refillable Liquified Gas R-438A air Choosing the right choice Choosing. Advisor / professor discourage all collaboration split ” must now be determined the when... Hp two stage air compressor with no after cooler disadvantages, it is a question answer. Sizing accuracy, you will have the choice between a cheap piston compressor or a one. Character choices cc by-sa is too short or too large diameter, or responding to other,! Sensitive components that must be properly lubricated in order to choose a model that ’ s with... Local supply house ( or internet store ) and put the model number in your compressor develops are more and! Cookie policy up in a hermetically welded envelope: this is the basis when designing a refrigeration system and the! Include your inefficiency and design for 20 % or more above what you do n't know what you need high-level... Inc ; user contributions licensed under cc by-sa all parts of the supply current high. You deturmine what capacity you need on a compressor many air conditioning systems and modern refrigerators a! * * DISCONTINUED name, email, and pressure issues vaccines, except for EU the level.
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