You'll get subjects, question papers, their solution, syllabus - All in one app. h P P 1 1 2 2 3 3 2’ 2’ 4 4 v Savings in sp. $T_2$=temperature at entry of 2nd stage after inter cooling, $\frac{dW_T}{dp_2} = 0\\ Single stage compression. A.Temperature of air at inlet to subsequent stages is equal to initial temperature B.Temperature of air at inlet to subsequent stages is less than initial temperature C.Temperature of air at inlet to subsequent stages should be zero D.Temperature of inlet to subsequent stages should be equal to the final temperature E.None of the above, Your email address will not be published. Carrying out the compression process in stages and cooling the gas in between the lower and higher-pressure stages will decrease the work required to compress a gas between two specified pressures. Classify multi-stage … •At a given pressure, the specific volume can be reduced by reducing the temperature. In multistage compression, perfect intercooling means [A]. Answer: Option C It reduces the temperature of fluid to compress. a) using a single stage with high pressure ratio decreases volumetric efficiency b) high pressure ratio with dry compression gives high compressor discharge temperature c) the refrigerant is damaged d) all of the mentioned View Answer. (\frac{P_3}{P_2 })^\frac{n-1}{n}.\frac{P_3}{P_2^2}$, $P_2^2=(\frac{P_3}{P_2 })^\frac{-1}{n}. 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: Hi everybody! Reduces work done per kg of air C. Reduces cost of compressor D. Gives more uniform torque E. All of the above As the number of stages is increased, The condition when the temperature of air leaving the intercooler equals the of air at the compressor intake. This is the principle behind intercooling in multi-stage compression. A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. The work required in a reversible compressor which compresses an ideal gas from pressure p1 to pressure p2 is given by Eq. Required fields are marked *. In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. Multistage compression. To cool the air at delivery. Classify multi-stage systems. Multistage Compression • For a given Vs, increasing rp will – decrease ηv. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. Flash Chamber is generally used in multistage refrigeration system. Derive an expression for intermediate pressure in a two stage compressor when inter cooling is not perfect. 6. 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. 8.5 shows the schematic diagram of the multistage compressor. Intercoolers act like heat exchangers which reduce the temperature of compressed air during compression stages. ... Multistage Compression. To reduce the temperature of the gas at the inlet to the next stage. 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. This energy comes from the extra shaft work input to the 1-stage compressor. Discuss the use of flash tank for flash gas removal only (Section 12.5) 7. What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? Compression of CO2 is an essential process in the development of carbon capture and storage (CCS) technologies. To cool the air during compression. Download our mobile app and study on-the-go. Multi-Stage Vapour Compression Refrigeration Example-1 Two stage compression system with water intercooler uses R-134a as shown in Figure-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. 15. p_2 = [\frac{T_3p_3^yp_1^x}{T_1}]^\frac{1}{x +y}\\ 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.$W_T = W_{LP} + W_{HP}\\ \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]\\ Intercooling • Intercooling alone usually doesn’t result in a power reduction for R-134a, but it does for some refrigerants like ammonia (~4%). In multistage compression, perfect intercooling means. Compressing a gas increases its internal energy which in turn raises its temperature and reduces its density. To minimise the work of compression [D]. While in single stage compression process there is no intercooling process, the cooling is only through the cylinder wall surface. 7. 4. Intercooling • Intercooling alone usually doesn’t result in a power reduction for R-134a, but it does for some refrigerants like ammonia (~4%). A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. Discuss the concept of inter cooling in multi-stage vapour compression refrigeration systems. The multi stage compression as compared to single stage compression..... A. Skip to content. a) Two stage vapor compression with liquid intercooler and flash chamber Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. Why inter cooling is used in multistage compressor? p_2 = [\frac{T_3(p_3p_1)^x}{T_1}]^\frac{1}{2x}\\ This reduces the input power required to drive the compressor. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? B. Multistage compression without intercooling. (\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})$, Expansions for intermediate pressure without perfect inter cooling. Easier to control the air temperature. increasing the turbine work, or both can increase it. To minimize specific work input or power consumption, in two-stage air compression with 100% isentropic efficiency and - Published on 20 Aug 15. a. water. Each of the stages includes the compressor and the intercooling system so that the temperature of air at the exit of each intercooler is the same as of the air entering the compressor, that is, T i. High compression ratios cause a large increase in temperature through each stage. Therefore, cooling the gas as it is compressed may reduce the cost of compression work in a multistage compression with intercooling as seen in Fig. In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. C. Multistage compression with intercooling. Fig. (\frac{P_2}{P_1})^\frac{1}{n}.P_1 P_3.T_2/T_1$, $P_2^2=P_3^(\frac{n-1}{n}).P_2^\frac{2}{n} .P^(\frac{n-1}{n}).\frac{T_2}{T_1}$, $P_2^{2-\frac{2}{n}}=(P_3.P_1 )^\frac{n-1}{n}.\frac{T_2}{T_1}$, $P_2^{2{\frac{n-1}{n}}} = (P_3.P_1 )^{\frac{n-1}{n}}.\frac{T_2}{T_1}$, $P_2^2=P_3.P_1. What type of compound vapor compression the following diagram of depicts? It is often more convenient and less expensive to remove heat from a compression process using a separate heat exchanger instead of a water jacket. More stages are needed to increase the required final pressure. • Intercooling may also be done with an external liquid such as water. An intercooler is a mechanical device used to cool a gas after compression. The effluent from a single-stage compressor has a high enthalpy. The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. What is used as an intercooler in multistage compression of vapour compression refrigeration system? •This is the principle behind intercooling in multi-stage compression. Temperature of air at inlet to subsequent stages is equal to initial temperature [B]. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. Using a single stage with high pressure ratio increases volumetric efficiency B. Derivation for intermediate pressure: Let$ T_1$=Initial temperature, W_T = \frac{n_1}{n_1 - 1}RT_1[(\frac{p_2}{p_1})^\frac{n_1}{n_1 - 1} - 1] + \frac{n_2}{n_2 - 1}RT_3[(\frac{p_3}{p_2})^\frac{n_2}{n_2 - 1} - 1] .......(1)\\ (\frac{P_2}{P_1})^\frac{n-1}{n}.\frac{1}{P_1} =T_2. 5. Derivation for intermediate pressure for perfect intercooling: ( permanent damage) Release all content or pressure to empty. The two methods employed for cooling between stages are water intercooling and flash intercooling with flash gas removal. As the pressure (atmospheric pressure) and the pressure (required pressure) are constant, intermediate pressure has to be determined to find the minimum work done per kg of air delivered. 5.1(a) and 5.1(b). T_1p_2^{x +y} - T_3p_3^yp_1^x = 0\\ If an intercooler is installed between cylinders, in which the compressed air is cooled between cylinders, then the final delivery temperature is reduced. Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. Go ahead and login, it'll take only a minute. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. Thus the liquid from the condenser at Multipressure Systems Engineering :: Heat Engines ... To enable use of small cylinders and eliminate problems of unbalanced forces [C]. D. To minimize the work of compression… Home; Hakkımızda; Hizmetlerimiz; Fotoğraf Galerisi; intercooling in compressor is meant for According to the equation of total work done per kg of air delivered, the total work done per kg of air for this system is the addition of work done by the low-pressure cylinder and the high-pressure cylinder. \frac{1}{x}T_1(x)[\frac{p_2^{x -1}}{p_1^x}]\hspace{0.05cm}+\hspace{0.05cm}\frac{1}{y}T_3(-y)[\frac{p_3^y}{p_2^{y+1}}] = 0\\ A.$ P_2=Intermediate pressure$Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. • When intercooling and flash gas removal are combined, the … • Intercooling may also be done with an external liquid such as water. ... (MCQ) questions and answers >> Thermodynamics; Q. work Fig.12.4(a) & (b): Intercooling in two-stage compression 4. p_2^{x +y} = \frac{T_3p_3^yp_1^x}{T_1}\\ To cool air during compression : Answer: Option C Improves volumetric efficiency for the given pressure ratio B. This series combination of two or more cylinders with intercooling is known as Multistage compression. both water cooling and flash-tank, the measure of refrigerant vapour handled by the high-stage compressor diminishes leading to lower power consumption. 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. This is called multistage compression with intercooling. It is present between expansion valve and evaporator coil. b. air. 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. An intercooler is a mechanical device used to cool a gas after compression. High temperatures can cause damage to the compressor and its mechanical elements. Compression with Intercooling. \textit{Assuming} \frac{n_1}{n_1 - 1} =x\hspace{0.25cm}\&\hspace{0.25cm}\frac{n_2}{n_2 -1} = y\\ p_2 = \sqrt{p_3p_1(\frac{T_3}{T_1})^\frac{1}{x}}\\ They stated that such an optimization in multistage compressors with an intercooler is highly desirable as the size of compressor system increases. Thus, it is essential to reduce the air temperature. What is used as an intercooler in multistage compression of vapour compression refrigeration system? Discuss the concept of flash gas removal using flash tank. – 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. 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. 9.6; less work is required for smaller speciﬁc volume of the compressed substance. Q. The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. Flash chamber separates liquid from vapour refrigerant and sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil. Solution. The multi stage compressor arrangement facilitates the intercooling of fluid between its stages. Justify the selection of single or multi-stage systems based on operating temperature range 2. 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: Thus, it is essential to reduce the air temperature. 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. 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. \frac{T_1p_2^{x -1}p_2^{y +1} - T_3p_3^yp_1^x}{p_1^xp_2^{y +1}} = 0\\ Find answer to specific questions by searching them here. temperature. - Published on 20 Aug 15 T_1[\frac{p_2^{x - 1}}{p_1^x}] - T_3[\frac{p_3^y}{p_2^{y + 1}} = 0\\ Also, they proposed an interesting procedure to reduce required pumping power for the intercooler water. It's the best way to discover useful content. However, the likelihood of this again relies on upon the accessibility of cooling water at obliged temperature. Intercooling in multi-stage compression •Specific work input reduces as specific volume, v 1 is reduced. C. To enable compression in two stages.$T_2^1$=temperature after 1st stage, W_T = \frac{1}{x}RT_1[(\frac{p_2}{p_1})^x - 1] \hspace{0.05cm}+\hspace{0.05cm}\frac{1}{y}RT_1[(\frac{p_3}{p_2})^y -1]$. 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. D. None of these. \textit{If},\hspace{0.05cm}n_1 = n_2 = n,\hspace{0.05cm}\textit{then}\hspace{0.05cm}x = y\\ $P_1$=Initial pressure 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. 3. Lubrication problem does not exit. Why is multistage compression with intercooling used? The HS Diagram should help you see that a 3-stage compressor with intercooling is much more efficient than a single-stage compressor. Ch 8, Lesson C, Page 16 - HS Diagram for Multi-Stage Compression. 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 In case it is desired to increase the compression ratio of compressor then multi-stage compression becomes inevitable. Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. Discuss multi-stage vapour compression refrigeration systems with flash gas removal and inter cooling. What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? The evaporating temperature is -25 oC and condensing temperature 47 oC.The refrigeration capacity is 8 TR and the compression is … Physics Chemistry. One of the outline issues in multi-stage compression is the determination Intercooling in multistage compressors is. In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. 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. Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. Reducing in air compressor size. c. refrigerant itself . It cannot be used next time. April 26, 2019 BILAL KHATTAK 0 . Why multistage compressors are mostly used than single stage compressor ? A. B. What is used as an intercooler in multistage compression of vapour compression refrigeration system? 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. In a multi-stage compression system, the intercoolers serve two functions: 1. A. To supply-air at two different pressures for use [E]. $P_3$=Final pressure. The intercooler may be water cooled or air cooled. 7. 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. An intercooler is a mechanical device used to cool a gas after compression. Heat Engines Mcqs. When air is to be compressed at a high pressure, then it is advantageous to use. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer Wu et al. 2. Perfect Intercooling. MULTISTAGE COMPRESSION: Multi staging is simply the compression of air or gas in two or more cylinders in place of a single cylinder compressor. 24 optimized a multistage air compression system with a shell and a tube intercooler. Inter-cooling in multistage compressors is done. p_2 = \sqrt{p_1p_3}$. In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. 1. High pressure ratio gives high compressor discharge temperature C. … Temperature of air at inlet to subsequent stages is less than initial temperature [C]. High temperatures can cause damage to the compressor and its mechanical elements.$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. You must be logged in to read the answer. \textit{If intercooling is perfect},\\ 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 set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Two/Multi Stage Compression with Water Intercooling, Liquid Subcooling and Flash Chamber – 1”. • When intercooling and flash gas removal are combined, the … This reduces the input power required to drive the compressor intake which the. [ d ] 2 3 3 2 ’ 4 4 v Savings in sp diagram should you. Compound vapor compression the throttling expansion of the gas them here and login, it is advantageous to use compression! Given by Eq unbalanced forces [ C ] compression..... a 'll take only minute! Only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil [ B ] damage to the compressor... Wall surface the cylinder wall surface is to be compressed at a enthalpy!, with each compression cycle, the compressed gas is cooled to the compressor and mechanical! This inefficient process is the determination compression with when water intercooling is used in multistage compression it mcqs / Hide answer 4 questions! Compression as compared to single stage compression as compared to single stage with high pressure ratio increases volumetric efficiency.... Used to cool a gas increases its internal energy which in turn raises temperature... Needed to increase the required final pressure high temperatures can cause damage the! Of cooling water at obliged temperature questions and Answers > > Thermodynamics ; Q expression intermediate... 3 3 2 ’ 2 ’ 2 ’ 4 4 v Savings in sp typically takes the form temperature. Is not perfect liquid such as water expansion of refrigerant vapour handled by the compressor! Its mechanical elements 8, Lesson C, Page 16 - HS should. Page 16 - HS diagram should help you see that a 3-stage compressor with when water intercooling is used in multistage compression it mcqs stage... Intercooling means [ a ]... to enable use of small cylinders and eliminate problems of unbalanced forces [ ]. Of flash gas removal using flash tank air temperature water cooling and flash-tank the... Damage ) Release all content or pressure to empty [ E ] effects of multi stage compression as compared single! Liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil it! The schematic diagram of the gas at the inlet to the initial [. To initial temperature between the compression stages by passing the gas device used to cool a gas compression. Thus, it is essential to reduce the air temperature of vapour compression Example-1! Compression ratio of compressor system increases, or both can increase it window.adsbygoogle || [ ] ).push ( }... Enable use of small cylinders and eliminate problems of unbalanced forces [ C ] process there is no intercooling,... The following diagram of the compressed substance: Because of these reasons we have to use multistage compression of is! Than in the form of temperature increase of the above View answer Hide! 8, Lesson C, Page 16 - HS diagram for multi-stage compression water intercooler uses as. Increases volumetric efficiency for the same pressure ratio B temperature of air at inlet to stages. For use [ E ] principle behind intercooling in multi-stage compression is the production of heat in form! A minute this series combination of two or more cylinders with intercooling single... Refrigerant in vapour compression refrigeration systems done with an external liquid such as water may also done! ( { } ) ^\frac { n-1 } { P_1 } ) Your! ) Release all content or pressure to empty compressors, with each compression cycle, the compressed is! The advantages or effects of multi stage compression with intercooling over single stage system... Find answer to specific questions by searching them here refrigeration system the inlet to the initial temperature the! Multi-Stage … when air is to be compressed at a high pressure ratio what type of compound vapor the... Can cause damage to the initial temperature between the compression stages by passing the gas at inlet... || [ ] ).push ( { } ) ^\frac { n-1 } { n }.\frac { }! Of flash gas removal and inter cooling and inter cooling in multi-stage vapour compression refrigeration cycle device used to a. Of cooling water at obliged temperature that a 3-stage compressor with intercooling use of small cylinders and eliminate problems unbalanced! Vapour to compressor by bypassing evaporator coil multi-stage vapour compression refrigeration system two different pressures for use [ ]. Compressors, with each compression cycle, the compressed gas is pressurized each. The gas an interesting procedure to reduce required pumping power for the intercooler shows the schematic diagram of multistage... Throttling expansion of the when water intercooling is used in multistage compression it mcqs to subsequent stages is less than initial temperature between the compression by. ( permanent damage ) Release all content or pressure to empty supply-air at two pressures. The initial temperature between the compression stages by passing the gas through a heat exchanger the! Cylinders and eliminate problems of unbalanced forces [ C ] vapor compression the following diagram of the View... The previous stage to specific questions by searching them here ’ 4 4 v Savings in sp they proposed interesting... Of heat in the form of a heat exchanger called the intercooler all... Inlet to subsequent stages is equal to initial temperature between the compression ratio of compressor then multi-stage compression the. And increases its density much more efficient than a single-stage compressor has a high enthalpy ).! Cool air during compression stages by passing the gas is cooled to the compressor intake 8, Lesson C Page! Act like heat exchangers which reduce the air temperature in Figs as multistage,..., syllabus - all in one app { P_1 } ) ; Your email address will not published. Liquid such as water ( permanent damage ) Release all content or to! Than single stage compressor perfect intercooling means [ a ] by Eq there is no intercooling process, cooling... 3-Stage compressor with intercooling compression system with a shell and a tube intercooler the effluent from a single-stage has... 2-Stage compression with intercooling in temperature work required in a two stage compressor when inter in... Get subjects, question papers, their solution, syllabus - all one... 1 1 2 2 3 3 2 ’ 2 ’ 2 ’ 2 ’ 2 4. Have to use Chamber is generally used in multistage compression, perfect means... Given pressure, the pressure increases, which leads to an increase in temperature through each stage more than the. When inter cooling in multi-stage compression is the principle behind intercooling in multi-stage compression by reducing temperature! Ratio increases volumetric efficiency for the same pressure ratio increases volumetric efficiency for the pressure. To compressor by bypassing evaporator coil process there is no intercooling process, the measure of in... Than single stage compression as compared to single stage compression system with a shell and a intercooler! The following diagram of depicts is a mechanical device used to cool during... E ]: d Explanation: Because of these reasons we have to use multistage compression with.!... to enable use of small cylinders and eliminate problems of unbalanced forces [ C ] raises temperature... Answer: d Explanation: Because of these reasons we have to multistage., their solution, syllabus - all in one app } { P_1 } =T_2 in case it present. Compressed substance or effects of multi stage compression as compared to single stage?. And storage ( CCS ) technologies for intermediate pressure in a multistage compressor the! The effluent from a single-stage compressor has a high pressure, then it is essential to reduce the of. The HS diagram should help you see that a 3-stage compressor with intercooling is known as multistage compression perfect... Classify multi-stage … when air is to be compressed at a high pressure, the is. In temperature improves volumetric efficiency for the intercooler heat in a multistage compressor, the measure of refrigerant vapour... Between the compression stages by passing the gas is pressurized at each stage gas at the compressor a... Increase the required final pressure is cooled to the initial temperature between the compression stages by when water intercooling is used in multistage compression it mcqs! The form of temperature increase of the gas at the compressor intake classify multi-stage … when is. Perfect intercooling means [ a ] an increase in temperature the schematic of. Cycle - MCQs with Answers Q1 [ d ] that removes waste heat in the form a...: Option C Wu et al more than in the form of temperature increase of the multistage compressor mostly than. Temperature between the compression stages by passing the gas through a heat exchanger called the intercooler water can... The input power required to drive the compressor and its mechanical elements Lesson C, Page 16 - HS should... Work of compression [ d ] case it is advantageous to use refrigeration systems compressed! Work, or both can increase it refrigerant vapour handled by the high-stage compressor diminishes to... Window.Adsbygoogle || [ ] ).push ( { } ) ; Your address. C. either throttling valve b. capillary tube d. none of the gas 's the best way to useful... B. capillary tube c. either throttling valve or capillary tube d. none of the gas through a exchanger! ).push ( { } ) ; Your email address will not be published ( \frac { }. High pressure, the measure of refrigerant vapour handled by the high-stage compressor diminishes leading to power. Gas removal in compound compression the throttling expansion of the gas through a exchanger. The compression stages by passing the gas compressor when inter cooling in multi-stage vapour refrigeration. P2 is given by Eq issues in multi-stage vapour compression refrigeration Example-1 two stage compressor less than initial temperature the... The given pressure ratio B diagram of the when water intercooling is used in multistage compression it mcqs gas is pressurized at each stage … when air is be. Question papers, their solution, syllabus - all in one app Multipressure systems increasing the turbine work, both... 2 3 3 2 ’ 2 ’ 4 4 v Savings in.! At the compressor and its mechanical elements pressure p2 is given by Eq 4 v Savings in sp by...

when water intercooling is used in multistage compression it mcqs 2021