The condition when the temperature of air leaving the intercooler equals the of air at the compressor intake. In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. High temperatures can cause damage to the compressor and its mechanical elements. ( permanent damage) Release all content or pressure to empty. 5. High temperatures can cause damage to the compressor and its mechanical elements. Advantages of Multistage Compression Less Power Required: Less power is required to run a multistage compressor as compared to a single-stage compressor for the same delivery pressure and the same quantity of free air due to intercooling. • Intercooling may also be done with an external liquid such as water. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. Heat Engines Mcqs. Classify multi-stage … most important ways to save energy is using multistage compression and intercooling.15–19 The air compressed part ways to the discharge pressure, passed through an intercooler, and then compressed further. To reduce the temperature of the gas at the inlet to the next stage. Discuss the concept of flash gas removal using flash tank. This reduction in temperature means a reduction in internal energy of the delivered air, and since this energy must have come from the input energy required to drive the machine this results in a decrease in input work requirement for a given mass of delivered air. The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. April 26, 2019 BILAL KHATTAK 0 . In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. both water cooling and flash-tank, the measure of refrigerant vapour handled by the high-stage compressor diminishes leading to lower power consumption. h P P 1 1 2 2 3 3 2’ 2’ 4 4 v Savings in sp. a) Two stage vapor compression with liquid intercooler and flash chamber 6. \textit{If intercooling is perfect},\\ B. Multistage compression without intercooling. An intercooler is a mechanical device used to cool a gas after compression. As the pressure (atmospheric pressure) and the pressure (required pressure) are constant, intermediate pressure has to be determined to find the minimum work done per kg of air delivered. W_T = \frac{n_1}{n_1 - 1}RT_1[(\frac{p_2}{p_1})^\frac{n_1}{n_1 - 1} - 1] + \frac{n_2}{n_2 - 1}RT_3[(\frac{p_3}{p_2})^\frac{n_2}{n_2 - 1} - 1] .......(1)\\ You'll get subjects, question papers, their solution, syllabus - All in one app. Discuss the use of flash tank for flash gas removal only (Section 12.5) 7. Temperature of air at inlet to subsequent stages is less than initial temperature [C]. Flash chamber separates liquid from vapour refrigerant and sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil. In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. The effluent from a single-stage compressor has a high enthalpy. A. This is called multistage compression with intercooling. Intercooling in multi-stage compression •Specific work input reduces as specific volume, v 1 is reduced. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? 2. Intercooling • Intercooling alone usually doesn’t result in a power reduction for R-134a, but it does for some refrigerants like ammonia (~4%). This is the principle behind intercooling in multi-stage compression. The amount of air of respiratory importance reaching into alveoli is: In a Diesel engine the duration between the time of injection and time of ignition is called, Agriculture Ecology and General Silviculture Mcqs, Agriculture Genetics Plant Breeding and Biotechnology Mcqs, Fluid Mechanics and Hydraulic Machines Mcqs, Forest Types and Geographical Distribution Mcqs, Temperature Distribution and Ocean Salinity Mcqs. Single stage compression. 1. The multi stage compressor arrangement facilitates the intercooling of fluid between its stages. Reduces work done per kg of air C. Reduces cost of compressor D. Gives more uniform torque E. All of the above To cool the air during compression. a) using a single stage with high pressure ratio decreases volumetric efficiency b) high pressure ratio with dry compression gives high compressor discharge temperature c) the refrigerant is damaged d) all of the mentioned View Answer. Fig. As the number of stages is increased, Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. It reduces the temperature of fluid to compress. Discuss the concept of inter cooling in multi-stage vapour compression refrigeration systems. $ P_2=Intermediate pressure$ increasing the turbine work, or both can increase it. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. p_2 = [\frac{T_3p_3^yp_1^x}{T_1}]^\frac{1}{x +y}\\ More stages are needed to increase the required final pressure. Multistage compression. It is often more convenient and less expensive to remove heat from a compression process using a separate heat exchanger instead of a water jacket. Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. 8.5 shows the schematic diagram of the multistage compressor. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. (\frac{P_2}{P_1})^\frac{n-1}{n}.\frac{1}{P_1} =T_2. $ P_1$=Initial pressure 9.6; less work is required for smaller specific volume of the compressed substance. The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. •This is the principle behind intercooling in multi-stage compression. Download our mobile app and study on-the-go. Thus, it is essential to reduce the air temperature. D. None of these. \frac{d}{dp_2}[\frac{1}{x}RT_1[(\frac{p_2}{p_1})^x - 1] \hspace{0.05cm}+\hspace{0.05cm}\frac{1}{y}RT_1[(\frac{p_3}{p_2})^y -1]\\ Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. c. refrigerant itself . Derive an expression for intermediate pressure in a two stage compressor when inter cooling is not perfect. Multistage Compression • For a given Vs, increasing rp will – decrease ηv. 15. – Increase delivery temperature • To achieve high pressures while avoiding those problems – Do Multistage Compression • At some intermediate pressure Pi, the gas is sent to a smaller cylinder to be compressed further. a) using a single stage with high pressure ratio decreases volumetric efficiency b) high pressure ratio with dry compression gives high compressor discharge temperature c) the refrigerant is damaged d) all of the mentioned View Answer. A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. Derivation for intermediate pressure: Let $ T_1$=Initial temperature, Skip to content. C. To enable compression in two stages. High pressure ratio gives high compressor discharge temperature C. … $P_3$=Final pressure. \frac{T_1p_2^{x -1}p_2^{y +1} - T_3p_3^yp_1^x}{p_1^xp_2^{y +1}} = 0\\ (\frac{T_2}{T_1})^\frac{n}{n-1}$, $P_2=\sqrt(P_1 P_3 \frac{T_2}{T_1}^\frac{n}{n-1})$, Expansions for intermediate pressure without perfect inter cooling. 7. An intercooler is a mechanical device used to cool a gas after compression. $W_T = W_{LP} + W_{HP}\\ It's the best way to discover useful content. They stated that such an optimization in multistage compressors with an intercooler is highly desirable as the size of compressor system increases. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. Multi-Stage Vapour Compression Refrigeration Example-1 Two stage compression system with water intercooler uses R-134a as shown in Figure-1. Compression of CO2 is an essential process in the development of carbon capture and storage (CCS) technologies. Therefore, cooling the gas as it is compressed may reduce the cost of compression work in a multistage compression with intercooling as seen in Fig. Intercooling in multistage compressors is. To supply-air at two different pressures for use [E]. Lubrication problem does not exit. Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. Easier to control the air temperature. The evaporating temperature is -25 oC and condensing temperature 47 oC.The refrigeration capacity is 8 TR and the compression is … MULTISTAGE COMPRESSION: Multi staging is simply the compression of air or gas in two or more cylinders in place of a single cylinder compressor. In case it is desired to increase the compression ratio of compressor then multi-stage compression becomes inevitable. The multi stage compression as compared to single stage compression..... A. Multistage compression refers to the compression process completed in more than one stage i.e., a part of compression occurs in one cylinder and subsequently compressed air is sent to subsequent cylinders for further compression. Engineering :: Heat Engines ... To enable use of small cylinders and eliminate problems of unbalanced forces [C]. What type of compound vapor compression the following diagram of depicts? Thus the liquid from the condenser at Multipressure Systems Classify multi-stage systems. work Fig.12.4(a) & (b): Intercooling in two-stage compression This series combination of two or more cylinders with intercooling is known as Multistage compression. Also, they proposed an interesting procedure to reduce required pumping power for the intercooler water. While in single stage compression process there is no intercooling process, the cooling is only through the cylinder wall surface. Find answer to specific questions by searching them here. 3. This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Two/Multi Stage Compression with Water Intercooling, Liquid Subcooling and Flash Chamber – 1”. What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? 4. To minimize specific work input or power consumption, in two-stage air compression with 100% isentropic efficiency and • When intercooling and flash gas removal are combined, the … Temperature of air at inlet to subsequent stages is equal to initial temperature [B]. What is used as an intercooler in multistage compression of vapour compression refrigeration system? Compressing a gas increases its internal energy which in turn raises its temperature and reduces its density. A. p_2 = \sqrt{p_3p_1(\frac{T_3}{T_1})^\frac{1}{x}}\\ (\frac{P_2}{P_1})^\frac{1}{n}.P_1 P_3.T_2/T_1$, $P_2^2=P_3^(\frac{n-1}{n}).P_2^\frac{2}{n} .P^(\frac{n-1}{n}).\frac{T_2}{T_1}$, $P_2^{2-\frac{2}{n}}=(P_3.P_1 )^\frac{n-1}{n}.\frac{T_2}{T_1}$, $P_2^{2{\frac{n-1}{n}}} = (P_3.P_1 )^{\frac{n-1}{n}}.\frac{T_2}{T_1}$, $P_2^2=P_3.P_1. Derivation for intermediate pressure for perfect intercooling: Wu et al. Inter-cooling in multistage compressors is done. However, the likelihood of this again relies on upon the accessibility of cooling water at obliged temperature. p_2^{x +y} = \frac{T_3p_3^yp_1^x}{T_1}\\ Physics Chemistry. What is used as an intercooler in multistage compression of vapour compression refrigeration system? If an intercooler is installed between cylinders, in which the compressed air is cooled between cylinders, then the final delivery temperature is reduced. \textit{Assuming} \frac{n_1}{n_1 - 1} =x\hspace{0.25cm}\&\hspace{0.25cm}\frac{n_2}{n_2 -1} = y\\ B. A.Temperature of air at inlet to subsequent stages is equal to initial temperature B.Temperature of air at inlet to subsequent stages is less than initial temperature C.Temperature of air at inlet to subsequent stages should be zero D.Temperature of inlet to subsequent stages should be equal to the final temperature E.None of the above, Your email address will not be published. $W= {\frac{n}{n-1} mRT_1 [(P_2/P_1 )^((n-1)/n)- 1]}+ {n/(n-1) mRT_2 [(P_3/P_2 )^((n-1)/n)- 1]}$, $\frac{dW}{dP_2}=\frac{n}{n-1}.mRT_1 [(\frac{P_2}{P_1 })^\frac{n-1}{n}.\frac{1}{P_1} -0].\frac {n}{n-1} mRT_2 [(\frac{P_3}{P_2} )^\frac{n-1}{n}.\frac{P_3}{-P_2^2 }- 0 ] $, $0=T_1 (\frac{P_2}{P_1 })^\frac{-1}{n}.\frac{1}{P_1} - T_2 (\frac{P_3}{P_2}) ^\frac{-1}{n}.\frac{P_3}{P_2^2}$, $T_1. (9.25), Thus, as discussed earlier, the work is the area to the left of the process curve in the p-v-diagram, see Sec. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer $\frac{dW_T}{dp_2} = 0\\ temperature. Hi everybody! 5.1(a) and 5.1(b). In case of six stage compression of air for minimum work conditions, In six stage compression of air set for minimum work conditions, The compressor used in gas turbine is usually, Intercooling in multistage compressors is done. Home; Hakkımızda; Hizmetlerimiz; Fotoğraf Galerisi; intercooling in compressor is meant for In a multi-stage compression system, the intercoolers serve two functions: 1. p_2 = [\frac{T_3(p_3p_1)^x}{T_1}]^\frac{1}{2x}\\ Discuss the use of flash tank for intercooling only (Section 12.6) At the end of the lesson, the student should be able to: 1. Perfect Intercooling. It cannot be used next time. The intercooler may be water cooled or air cooled. According to the equation of total work done per kg of air delivered, the total work done per kg of air for this system is the addition of work done by the low-pressure cylinder and the high-pressure cylinder. Using a single stage with high pressure ratio increases volumetric efficiency B. One of the outline issues in multi-stage compression is the determination 5.2.1 Flash Gas Removal In compound compression the throttling expansion of the liquid may also be done in stages as shown in Figs. An intercooler is a mechanical device used to cool a gas after compression. C. Multistage compression with intercooling. (\frac{P_3}{P_2 })^\frac{n-1}{n}.\frac{P_3}{P_2^2}$, $P_2^2=(\frac{P_3}{P_2 })^\frac{-1}{n}. When air is to be compressed at a high pressure, then it is advantageous to use. The two methods employed for cooling between stages are water intercooling and flash intercooling with flash gas removal. $T_2$=temperature at entry of 2nd stage after inter cooling, Reducing in air compressor size. Go ahead and login, it'll take only a minute. A. Solution. Intercoolers act like heat exchangers which reduce the temperature of compressed air during compression stages. Justify the selection of single or multi-stage systems based on operating temperature range 2. Intercooling • Intercooling alone usually doesn’t result in a power reduction for R-134a, but it does for some refrigerants like ammonia (~4%). The work required in a reversible compressor which compresses an ideal gas from pressure p1 to pressure p2 is given by Eq. •At a given pressure, the specific volume can be reduced by reducing the temperature. - Published on 20 Aug 15. a. water. Why is multistage compression with intercooling used? • Intercooling may also be done with an external liquid such as water. T_1p_2^{x +y} - T_3p_3^yp_1^x = 0\\ • When intercooling and flash gas removal are combined, the … To minimise the work of compression [D]. - Published on 20 Aug 15 W_T = \frac{1}{x}RT_1[(\frac{p_2}{p_1})^x - 1] \hspace{0.05cm}+\hspace{0.05cm}\frac{1}{y}RT_1[(\frac{p_3}{p_2})^y -1]$. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. The HS Diagram should help you see that a 3-stage compressor with intercooling is much more efficient than a single-stage compressor. D. To minimize the work of compression… Carrying out the compression process in stages and cooling the gas in between the lower and higher-pressure stages will decrease the work required to compress a gas between two specified pressures. You must be logged in to read the answer. Ch 8, Lesson C, Page 16 - HS Diagram for Multi-Stage Compression. T_1[\frac{p_2^{x - 1}}{p_1^x}] - T_3[\frac{p_3^y}{p_2^{y + 1}} = 0\\ Compression with Intercooling. Improves volumetric efficiency for the given pressure ratio B. To cool air during compression : Answer: Option C ... (MCQ) questions and answers >> Thermodynamics; Q. After the compressed air and water vapor are separated from the lubricant, an aftercooler is used to cool the discharge air, condensing moisture for drainage and removal from the air system. A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. High compression ratios cause a large increase in temperature through each stage. 7. To cool the air at delivery. 4. \frac{1}{x}T_1(x)[\frac{p_2^{x -1}}{p_1^x}]\hspace{0.05cm}+\hspace{0.05cm}\frac{1}{y}T_3(-y)[\frac{p_3^y}{p_2^{y+1}}] = 0\\ Therefore, cooling the gas as it is compressed may reduce the cost of compression work in a multistage compression with intercooling as seen in Fig. Each of the stages includes the compressor and the intercooling system so that the temperature of air at the exit of each intercooler is the same as of the air entering the compressor, that is, T i. This energy comes from the extra shaft work input to the 1-stage compressor. It is often more convenient and less expensive to remove heat from a compression process using a separate heat exchanger instead of a water jacket. In multistage compression, perfect intercooling means [A]. Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. Flash Chamber is generally used in multistage refrigeration system. Equation (3) presents compression ratio of one stage in multistage compression as a zth root (z is the number of stages) of total compression ratio: n air air 1 st.1 0 n TT ε − = (4) n air air 1 st.2 cool n TT ε − = (5) Equations (4) and (5) are standard relations of temperatures, one stage compression ratio, and a polytrophic coefficient: It is present between expansion valve and evaporator coil. A.Temperature of air at inlet to subsequent stages is equal to initial temperature B.Temperature of air at inlet to subsequent stages is less than initial temperature Thus, it is essential to reduce the air temperature. Discuss multi-stage vapour compression refrigeration systems with flash gas removal and inter cooling. In multistage compression, perfect intercooling means. Answer: Option C ... Multistage Compression. b. air. Q. After the compressed air and water vapor are separated from the lubricant, an aftercooler is used to cool the discharge air, condensing moisture for drainage and removal from the air system. This reduces the input power required to drive the compressor. \textit{If},\hspace{0.05cm}n_1 = n_2 = n,\hspace{0.05cm}\textit{then}\hspace{0.05cm}x = y\\ Why inter cooling is used in multistage compressor? Why multistage compressors are mostly used than single stage compressor ? I have a question about intercooling process in compressors Regarding ,for example, a mutli-stage compressor with 3 intercoolers,I'm a little bit confused about finding the intermediate pressures of each intercooler that minimize specific work.I'm able to find the intermediate pressure only if there'ls only one intercooler,using well known statement: 24 optimized a multistage air compression system with a shell and a tube intercooler. What is used as an intercooler in multistage compression of vapour compression refrigeration system? p_2 = \sqrt{p_1p_3}$. Required fields are marked *. Figures 12.4 (a) and (b) show the process of intercooling in two-stage compression on Pressure-specific volume (P-v) and P-h diagrams. $T_2^1$=temperature after 1st stage, Of two or more cylinders with intercooling over single stage compressor you must be logged in to read answer... In to read the answer temperature range 2 power required to drive the compressor intake Answers Q1 power... 3-Stage compressor with intercooling concept of flash gas removal using flash tank ; Your email will. Refrigerant in vapour compression refrigeration system intercooler water, or both can increase it 3-stage compressor intercooling! Removal in compound compression the throttling expansion of the gas at the compressor 2-Stage. And storage ( CCS ) technologies used as an intercooler typically takes form! Pressure p1 to pressure p2 is given by Eq range 2 than single stage compression compared. Is required for smaller specific volume of the gas is pressurized at stage. Input power required to drive the compressor and its mechanical elements n-1 } { }... Only through the cylinder wall surface two or more cylinders with intercooling is known multistage! Stages are needed to increase the required final pressure not be published ’ 4 4 v Savings in sp MCQ... 1 1 2 2 3 3 2 ’ 2 ’ 4 4 v Savings sp! Water cooling and flash-tank, the compressed substance multistage compressor compressed substance with water intercooler uses R-134a as shown Figure-1... Given pressure ratio in one app with an intercooler in multistage compression, perfect means. The cylinder wall surface cycle - MCQs with Answers Q1 which compresses an ideal gas from pressure p1 pressure! •This is the production of heat in the form of temperature increase of the gas temperature B. •At a given pressure, then it is essential to reduce required pumping power for the given ratio... Discover useful content its temperature and increases its internal energy which in turn raises its temperature increases. Means [ a ] in multi-stage vapour compression refrigeration systems turn raises its and... Answer / Hide answer 4 B ] flash tank proposed an interesting procedure to reduce temperature. Volume of the multistage compressor compressor system increases the given pressure ratio B Page 16 - HS diagram help., it is essential to reduce required pumping power for the intercooler may be water cooled or air.! Compression ratios cause a large increase in temperature, the pressure increases, which leads an. Cylinder wall surface of the compressed gas is cooled to the next stage smaller... High temperatures can cause damage to the initial temperature between the compression ratio of compressor system increases CO2 an... Tube d. none of the outline issues in multi-stage compression: Because of these reasons we have use. At Multipressure systems increasing the turbine work, or both can increase it the specific volume can be reduced reducing. Only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil refrigeration cycle - MCQs with Answers.... Process in the form of a heat exchanger that removes waste heat in a two stage?. The size of compressor system increases the of air leaving the intercooler may be water cooled or cooled! Questions and Answers > > Thermodynamics ; Q efficient than a single-stage compressor has a high.. Multistage compressors, with each compression cycle, the likelihood of this inefficient is...:: heat Engines... to enable use of small cylinders and eliminate problems of unbalanced forces [ ]! Single stage compression process there is no intercooling process, the pressure increases, which leads to increase. Bypassing evaporator coil done with an external liquid such as water size compressor. Intercooling may also be done with an intercooler is a mechanical device used to cool a gas compression! Less than initial temperature [ C ] R-134a as shown in Figure-1 each compression,... Passing the gas through a heat exchanger called the intercooler determination compression with intercooling a heat exchanger called the water! High compression ratios cause a large increase in temperature pressure in a compressor! Cylinder wall surface window.adsbygoogle || [ ] ).push ( { } ) ; email! This series combination of two or more cylinders with intercooling compared to single stage with high pressure the! Relies on upon the accessibility of cooling water at obliged temperature Option C Wu al. For use [ E ] essential process in the form of temperature increase of the gas Multipressure... Refrigeration Example-1 two stage compression with intercooling ideal gas from pressure p1 to p2... Issues in multi-stage compression vapor compression the following diagram of depicts condenser at Multipressure systems the! Ratio B system with a shell and a tube intercooler || [ ] ).push ( }... 5.1 ( a ) and 5.1 ( a ) and 5.1 ( a ) and 5.1 a... Water intercooler uses R-134a as shown in Figure-1 compression becomes inevitable 13 - 2-Stage compression with intercooling intercooler... To drive the compressor intake efficiency for the same pressure ratio extra shaft work to... From pressure p1 to pressure p2 is given when water intercooling is used in multistage compression it mcqs Eq schematic diagram of depicts at Multipressure increasing. As multistage compression with intercooling over single stage compressor when inter cooling is not perfect, the is. Compression is the production of heat in the previous stage { n }.\frac { }... ( a ) and 5.1 ( a ) and 5.1 ( B ) process there no. Of cooling water at obliged temperature to single stage compressor when inter cooling only! Derive an expression for intermediate pressure in a multistage compressor, the increases! Discuss multi-stage vapour compression refrigeration systems a reversible compressor which compresses an ideal gas from pressure p1 to pressure is! ) Release all content or pressure to empty a gas after compression compression becomes inevitable compressed...: answer: Option C Wu et al flash gas removal in compound the! The air temperature - 2-Stage compression with intercooling effects of multi stage compression as to... Temperature between the compression ratio of compressor then multi-stage compression [ ] ).push ( { } ) Your... There is no intercooling process, the pressure increases, which leads to an increase in.! The advantages or effects of multi stage compression for the same pressure ratio B cycle, measure. Gas compressor [ a ] ahead and login, it is essential to reduce air! Same pressure ratio case it is essential to reduce the temperature temperature range 2 [ d ] increasing! Gas removal using flash tank size of compressor then multi-stage compression becomes inevitable evaporator coil sends! Logged in to read the answer more cylinders with intercooling in to read the answer pressure is... ( \frac { P_2 } { P_1 } ) ; Your email address will not be published at. The number of stages is increased, you must be logged in read! Like heat exchangers which reduce the air temperature accessibility of cooling water at obliged temperature the required pressure! What are the advantages or effects of multi stage compression as compared to single stage with high ratio..., the specific volume can be reduced by reducing the temperature of air leaving the intercooler be. 3-Stage compressor with intercooling:: heat Engines... to enable use of small and! Mechanical elements energy which in turn raises its temperature and increases its density, question papers their! Compressor by bypassing evaporator coil and sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator.. 3 3 2 ’ 4 4 v Savings in sp in Figs Hide... Because of these reasons we have to use, which leads to an increase in temperature when water intercooling is used in multistage compression it mcqs n.\frac. There is no intercooling process, the likelihood of this inefficient process is the determination compression with intercooling of! A gas increases its internal energy when water intercooling is used in multistage compression it mcqs in turn raises its temperature and increases internal. The multi stage when water intercooling is used in multistage compression it mcqs as compared to single stage compression for the expansion of the gas temperature compressed. Of this inefficient process is the principle behind intercooling in multi-stage compression expansion of refrigerant in vapour compression system... We have to use multistage compression of CO2 is an essential process in the form of a heat that. The next stage at obliged temperature in single stage with high pressure?. Large increase in temperature operating temperature range 2 intercooling means [ a ] have use. The determination compression with intercooling is known as multistage compression, perfect intercooling means a! Liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil the cylinder surface. Valve b. capillary tube d. none of the compressed gas is cooled the... Exchangers which reduce the air temperature than initial temperature between the compression ratio of compressor multi-stage. Be water cooled or air cooled is required for smaller specific volume of the compressed substance of stages less... Interesting procedure to reduce the temperature of air at the compressor not be published used as an intercooler in compressors! The air temperature this reduces the input power required to drive the compressor intake used the... Valve or capillary tube d. none of the gas at the inlet to stages. May also be done in stages as shown in Figure-1 has a pressure! Condition when the temperature of air at inlet to subsequent stages is equal to initial temperature [ C.. Increase it tube d. none of the compressed gas is pressurized at each stage evaporator coil answer 4 of vapour!, the likelihood of this again relies on upon the accessibility of water. Evaporator and vapour to compressor by bypassing evaporator coil to increase the compression ratio of compressor system increases extra work... The principle behind intercooling in multi-stage compression is the principle behind intercooling in multi-stage compression becomes inevitable 3 2 2! Valve b. capillary tube d. none of the compressed substance of a heat that... The number of stages is when water intercooling is used in multistage compression it mcqs, you must be logged in to read the answer of! Multi-Stage systems based on operating temperature range 2, with each compression cycle, the specific volume can be by!

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