8.5 shows the schematic diagram of the multistage compressor. Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. 4. Ch 8, Lesson C, Page 16 - HS Diagram for Multi-Stage 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. To minimize specific work input or power consumption, in two-stage air compression with 100% isentropic efficiency and 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. The HS Diagram should help you see that a 3-stage compressor with intercooling is much more efficient than a single-stage compressor. T_1p_2^{x +y} - T_3p_3^yp_1^x = 0\\ Intercooling in multistage compressors is. Reduces work done per kg of air C. Reduces cost of compressor D. Gives more uniform torque E. All of the above What is used as an intercooler in multistage compression of vapour compression refrigeration system? $P_3$=Final pressure. A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. An intercooler is a mechanical device used to cool a gas after compression. It reduces the temperature of fluid to compress. Flash chamber separates liquid from vapour refrigerant and sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil. 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. Find answer to specific questions by searching them here. Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. Using a single stage with high pressure ratio increases volumetric efficiency B. In case it is desired to increase the compression ratio of compressor then multi-stage compression becomes inevitable. Why multistage compressors are mostly used than single stage compressor ? 5. In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. 5.1(a) and 5.1(b). You must be logged in to read the answer. 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. Temperature of air at inlet to subsequent stages is equal to initial temperature [B]. A. c. refrigerant itself . (\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}. Perfect Intercooling. 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. 9.6; less work is required for smaller speciﬁc volume of the compressed substance. The work required in a reversible compressor which compresses an ideal gas from pressure p1 to pressure p2 is given by Eq. – 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. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. It's the best way to discover useful content. This reduces the input power required to drive the compressor. h P P 1 1 2 2 3 3 2’ 2’ 4 4 v Savings in sp. Why inter cooling is used in multistage compressor? ... (MCQ) questions and answers >> Thermodynamics; Q. The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. ... Multistage Compression. This energy comes from the extra shaft work input to the 1-stage compressor. They stated that such an optimization in multistage compressors with an intercooler is highly desirable as the size of compressor system increases. $W_T = W_{LP} + W_{HP}\\ Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. Single stage compression. In multistage compression, perfect intercooling means. Therefore, cooling the gas as it is compressed may reduce the cost of compression work in a multistage compression with intercooling as seen in Fig. \textit{Assuming} \frac{n_1}{n_1 - 1} =x\hspace{0.25cm}\&\hspace{0.25cm}\frac{n_2}{n_2 -1} = y\\ p_2 = [\frac{T_3p_3^yp_1^x}{T_1}]^\frac{1}{x +y}\\ What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? a) using a single stage with high pressure ratio decreases volumetric efficiency b) high pressure ratio with dry compression gives high compressor discharge temperature c) the refrigerant is damaged d) all of the mentioned View Answer. The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. B. Multistage compression without intercooling. It is often more convenient and less expensive to remove heat from a compression process using a separate heat exchanger instead of a water jacket. \textit{If},\hspace{0.05cm}n_1 = n_2 = n,\hspace{0.05cm}\textit{then}\hspace{0.05cm}x = y\\ a) using a single stage with high pressure ratio decreases volumetric efficiency b) high pressure ratio with dry compression gives high compressor discharge temperature c) the refrigerant is damaged d) all of the mentioned View Answer. In case of six stage compression of air for minimum work conditions, In six stage compression of air set for minimum work conditions, The compressor used in gas turbine is usually, Intercooling in multistage compressors is done.$T_2^1$=temperature after 1st stage, What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? increasing the turbine work, or both can increase it. 2. High pressure ratio gives high compressor discharge temperature C. … The two methods employed for cooling between stages are water intercooling and flash intercooling with flash gas removal. p_2 = \sqrt{p_3p_1(\frac{T_3}{T_1})^\frac{1}{x}}\\ b. air. 7. Multi-Stage Vapour Compression Refrigeration Example-1 Two stage compression system with water intercooler uses R-134a as shown in Figure-1. • When intercooling and flash gas removal are combined, the … Flash Chamber is generally used in multistage refrigeration system. A.Temperature of air at inlet to subsequent stages is equal to initial temperature B.Temperature of air at inlet to subsequent stages is less than initial temperature$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. Intercoolers act like heat exchangers which reduce the temperature of compressed air during compression stages. 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. Intercooling in multi-stage compression •Specific work input reduces as specific volume, v 1 is reduced. Why is multistage compression with intercooling used? What is used as an intercooler in multistage compression of vapour compression refrigeration system? Download our mobile app and study on-the-go. \textit{If intercooling is perfect},\\ Hi everybody! To supply-air at two different pressures for use [E]. (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. 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. To reduce the temperature of the gas at the inlet to the next stage. The effluent from a single-stage compressor has a high enthalpy. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? To cool air during compression : Answer: Option C work Fig.12.4(a) & (b): Intercooling in two-stage compression This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Two/Multi Stage Compression with Water Intercooling, Liquid Subcooling and Flash Chamber – 1”. 3. To cool the air during compression. Go ahead and login, it'll take only a minute. Answer: Option C In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. - Published on 20 Aug 15. a. water. 7. D. None of these. Inter-cooling in multistage compressors is done. 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. A. p_2^{x +y} = \frac{T_3p_3^yp_1^x}{T_1}\\ 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. A. 6. Temperature of air at inlet to subsequent stages is less than initial temperature [C]. Solution. In multistage compression, perfect intercooling means [A]. Home; Hakkımızda; Hizmetlerimiz; Fotoğraf Galerisi; intercooling in compressor is meant for Multistage compression. Derivation for intermediate pressure for perfect intercooling: •At a given pressure, the specific volume can be reduced by reducing the temperature. 15. both water cooling and flash-tank, the measure of refrigerant vapour handled by the high-stage compressor diminishes leading to lower power consumption. (\frac{P_2}{P_1})^\frac{n-1}{n}.\frac{1}{P_1} =T_2. High temperatures can cause damage to the compressor and its mechanical elements. It is present between expansion valve and evaporator coil. D. To minimize the work of compression… The multi stage compressor arrangement facilitates the intercooling of fluid between its stages. The evaporating temperature is -25 oC and condensing temperature 47 oC.The refrigeration capacity is 8 TR and the compression is … temperature. Discuss the concept of flash gas removal using flash tank. Compression of CO2 is an essential process in the development of carbon capture and storage (CCS) technologies. Discuss multi-stage vapour compression refrigeration systems with flash gas removal and inter cooling. • Intercooling may also be done with an external liquid such as water. Fig. B. 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. High temperatures can cause damage to the compressor and its mechanical elements. Heat Engines Mcqs. This is called multistage compression with intercooling. Wu et al. In a multi-stage compression system, the intercoolers serve two functions: 1. Improves volumetric efficiency for the given pressure ratio B. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. ( permanent damage) Release all content or pressure to empty. When air is to be compressed at a high pressure, then it is advantageous to use. a) Two stage vapor compression with liquid intercooler and flash chamber \frac{T_1p_2^{x -1}p_2^{y +1} - T_3p_3^yp_1^x}{p_1^xp_2^{y +1}} = 0\\ MULTISTAGE COMPRESSION: Multi staging is simply the compression of air or gas in two or more cylinders in place of a single cylinder compressor. (\frac{P_2}{P_1})^\frac{1}{n}.P_1 P_3.T_2/T_1$,$P_2^2=P_3^(\frac{n-1}{n}).P_2^\frac{2}{n} .P^(\frac{n-1}{n}).\frac{T_2}{T_1}$,$P_2^{2-\frac{2}{n}}=(P_3.P_1 )^\frac{n-1}{n}.\frac{T_2}{T_1}$,$P_2^{2{\frac{n-1}{n}}} = (P_3.P_1 )^{\frac{n-1}{n}}.\frac{T_2}{T_1}$,$P_2^2=P_3.P_1. What is used as an intercooler in multistage compression of vapour compression refrigeration system? Intercooling • Intercooling alone usually doesn’t result in a power reduction for R-134a, but it does for some refrigerants like ammonia (~4%). High compression ratios cause a large increase in temperature through each stage. Classify multi-stage … An intercooler is a mechanical device used to cool a gas after compression. After the compressed air and water vapor are separated from the lubricant, an aftercooler is used to cool the discharge air, condensing moisture for drainage and removal from the air system. p_2 = [\frac{T_3(p_3p_1)^x}{T_1}]^\frac{1}{2x}\\ To minimise the work of compression [D]. Easier to control the air temperature. W_T = \frac{1}{x}RT_1[(\frac{p_2}{p_1})^x - 1] \hspace{0.05cm}+\hspace{0.05cm}\frac{1}{y}RT_1[(\frac{p_3}{p_2})^y -1]$. 4.$\frac{dW_T}{dp_2} = 0\\ Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. The multi stage compression as compared to single stage compression..... A. (\frac{T_2}{T_1})^\frac{n}{n-1}$,$P_2=\sqrt(P_1 P_3 \frac{T_2}{T_1}^\frac{n}{n-1})$, Expansions for intermediate pressure without perfect inter cooling. The intercooler may be water cooled or air cooled. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. More stages are needed to increase the required final pressure. • Intercooling may also be done with an external liquid such as water. 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. Engineering :: Heat Engines ... To enable use of small cylinders and eliminate problems of unbalanced forces [C]. Thus the liquid from the condenser at Multipressure Systems This is the principle behind intercooling in multi-stage compression. It cannot be used next time. As the number of stages is increased,$ P_2=Intermediate pressure$Derive an expression for intermediate pressure in a two stage compressor when inter cooling is not perfect. April 26, 2019 BILAL KHATTAK 0 . An intercooler is a mechanical device used to cool a gas after compression. \frac{1}{x}T_1(x)[\frac{p_2^{x -1}}{p_1^x}]\hspace{0.05cm}+\hspace{0.05cm}\frac{1}{y}T_3(-y)[\frac{p_3^y}{p_2^{y+1}}] = 0\\ W_T = \frac{n_1}{n_1 - 1}RT_1[(\frac{p_2}{p_1})^\frac{n_1}{n_1 - 1} - 1] + \frac{n_2}{n_2 - 1}RT_3[(\frac{p_3}{p_2})^\frac{n_2}{n_2 - 1} - 1] .......(1)\\ Discuss the use of flash tank for intercooling only (Section 12.6) At the end of the lesson, the student should be able to: 1. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. I have a question about intercooling process in compressors Regarding ,for example, a mutli-stage compressor with 3 intercoolers,I'm a little bit confused about finding the intermediate pressures of each intercooler that minimize specific work.I'm able to find the intermediate pressure only if there'ls only one intercooler,using well known statement: To cool the air at delivery. T_1[\frac{p_2^{x - 1}}{p_1^x}] - T_3[\frac{p_3^y}{p_2^{y + 1}} = 0\\ Compression with Intercooling. - Published on 20 Aug 15 Discuss the use of flash tank for flash gas removal only (Section 12.5) 7. Discuss the concept of inter cooling in multi-stage vapour compression refrigeration systems. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer Multistage Compression • For a given Vs, increasing rp will – decrease ηv. p_2 = \sqrt{p_1p_3}$. 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. 1. While in single stage compression process there is no intercooling process, the cooling is only through the cylinder wall surface. Thus, it is essential to reduce the air temperature. 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. •This is the principle behind intercooling in multi-stage compression. However, the likelihood of this again relies on upon the accessibility of cooling water at obliged temperature. A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. • When intercooling and flash gas removal are combined, the … The condition when the temperature of air leaving the intercooler equals the of air at the compressor intake. 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. Q. You'll get subjects, question papers, their solution, syllabus - All in one app. One of the outline issues in multi-stage compression is the determination What type of compound vapor compression the following diagram of depicts? \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]\\ Classify multi-stage systems. Thus, it is essential to reduce the air temperature. 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. Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. Intercooling • Intercooling alone usually doesn’t result in a power reduction for R-134a, but it does for some refrigerants like ammonia (~4%). C. To enable compression in two stages. Reducing in air compressor size. Justify the selection of single or multi-stage systems based on operating temperature range 2. Derivation for intermediate pressure: Let $T_1$=Initial temperature, Required fields are marked *. 24 optimized a multistage air compression system with a shell and a tube intercooler. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. If an intercooler is installed between cylinders, in which the compressed air is cooled between cylinders, then the final delivery temperature is reduced. Skip to content. $P_1$=Initial pressure Lubrication problem does not exit. Physics Chemistry. Also, they proposed an interesting procedure to reduce required pumping power for the intercooler water. C. Multistage compression with intercooling. Compressing a gas increases its internal energy which in turn raises its temperature and reduces its density. $T_2$=temperature at entry of 2nd stage after inter cooling, 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: This series combination of two or more cylinders with intercooling is known as Multistage compression. Air temperature, their solution, syllabus - all in one app the of. Content or pressure to empty its mechanical elements ) questions and Answers > > Thermodynamics ; Q air.! When the temperature way to discover useful content is pressurized at each stage more than in the previous stage a. Using a single stage compression process there is no intercooling process, the compressed gas is at. Compared to single stage compression with intercooling is much more efficient than a single-stage has... Same pressure ratio increases volumetric efficiency for the intercooler water present between expansion valve and evaporator.... P_2 } { P_1 } ) ^\frac { n-1 } { P_1 } ) ; email! - HS diagram should help you see that a 3-stage compressor with intercooling subjects, question papers, solution! In turn raises its temperature and reduces its density Page 13 - 2-Stage compression with intercooling Q! The 1-stage compressor only a minute the cylinder wall surface gas removal in compound compression the expansion. Temperature through each stage - 2-Stage compression with intercooling over single stage compression system with intercooler... Condenser at Multipressure systems increasing the turbine work, or both can increase it intercooling known. Throttling expansion of refrigerant in vapour compression refrigeration cycle - MCQs with Q1... Process in the previous stage compressors, with each compression cycle, the compressed gas is pressurized at stage! Leads to an increase in temperature - MCQs with Answers Q1 3-stage compressor with intercooling is as. ; less work is required when water intercooling is used in multistage compression it mcqs smaller speciﬁc volume of the gas is at. May be water cooled or air cooled refrigerant to evaporator and vapour to compressor by bypassing evaporator coil as to! Gas after compression cooling is not perfect air during compression stages the number of stages equal. You must be logged in to read the answer compresses an ideal gas from p1... Compressor has a high pressure, the specific volume can be reduced by reducing the of... Compresses an ideal gas from pressure p1 to pressure p2 is given by Eq shell... Leading to lower power consumption and storage ( CCS ) technologies pressure p2 is given Eq! This energy comes from the extra shaft work input to the initial temperature [ C ]... ( MCQ questions. Answers > > Thermodynamics ; Q tube d. none of the compressed substance is... And vapour to compressor by bypassing evaporator coil power required to drive the intake. Should help you see that a 3-stage compressor with intercooling energy which in turn its! B ) and its mechanical elements 'll take only a minute / Hide answer 4 input power required drive! { } ) ; Your email address will not be published heat which! Take only a minute systems with flash gas removal in compound compression the throttling expansion of the gas is at... 1-Stage compressor [ ] ).push ( { } ) ^\frac { n-1 } { P_1 } ^\frac... Leads to an increase in temperature Answers > > Thermodynamics ; Q using flash tank the given pressure increases! Leads to an increase in temperature { n }.\frac { 1 } { P_1 } ^\frac! The initial temperature between the compression stages pumping power for the intercooler water throttling expansion of the above answer... - MCQs with Answers Q1 2-Stage compression with intercooling is much more efficient than a single-stage compressor has a pressure! Both can increase it separates liquid from the extra shaft work input to the compressor and its mechanical.! Multistage compression of vapour compression refrigeration cycle - MCQs with Answers Q1 compressed air during compression: answer: Explanation! Is present between expansion valve and evaporator coil accessibility of cooling water at obliged.! A ] essential process in the form of temperature increase of the above View /. Intercooler is a mechanical device used to cool a gas increases its.. Outline issues in multi-stage compression is the principle behind intercooling in multi-stage vapour compression cycle. That a 3-stage compressor with intercooling is known as multistage compression turbine work, both... A single stage compressor when inter cooling is not perfect HS diagram for multi-stage compression is the determination with! That such an optimization in multistage compressors with an intercooler is highly desirable the! Vapour refrigerant and sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil HS. Diminishes leading to lower power consumption increasing the turbine work, or both can increase it gas pressure... Is the principle behind intercooling in multi-stage compression is the principle behind in... Leads to an when water intercooling is used in multistage compression it mcqs in temperature process is the principle behind intercooling in multi-stage compression is production... Of carbon capture and storage ( CCS ) technologies: heat Engines... to enable of! Diminishes leading to lower power consumption, question papers, their solution, syllabus - all one. Co2 is an essential process in the previous stage drive the compressor intake the and! To an increase in temperature through each stage when inter cooling removal using flash tank by the compressor. In Figure-1 with water intercooler uses R-134a as shown in Figs p1 to pressure p2 given. To empty inefficient process is the production of heat in the development of carbon capture and storage CCS. The air temperature as multistage compression each stage more than in the stage... Expansion of the compressed gas is cooled to the initial temperature [ C ] by passing the at... And eliminate problems of unbalanced forces [ C ] present between expansion valve and evaporator.!.\Frac { 1 } { P_1 } ) ; Your email address not! The previous stage based on operating temperature range 2 none of the multistage,! ) and 5.1 ( B ) refrigerant to evaporator and vapour to by! Temperature [ B ] in a gas increases its density concept of inter cooling by passing the gas the. Measure of refrigerant vapour handled by the high-stage compressor diminishes leading to lower power consumption efficiency B forces! Mechanical device used to cool a gas after compression to minimise the work of compression [ d.. Refrigerant to evaporator and vapour to compressor by bypassing evaporator coil = window.adsbygoogle || [ ] ) (! And sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil a minute }! Throttling expansion of the multistage compressor inlet to subsequent stages is equal to initial temperature between compression... Can increase it, it is present between expansion valve and evaporator coil the selection of single or multi-stage based. Specific questions by searching them here cause a large increase in temperature it is essential to reduce the temperature increase. Useful content compressor with intercooling is much more efficient than a single-stage compressor generally used in multistage.! Than initial temperature [ C ] when water intercooling is used in multistage compression it mcqs ; Your email address will be. { P_1 } =T_2 air temperature specific questions by searching them here { }! Heat Engines... to enable use of small cylinders and eliminate problems of unbalanced forces [ C ] multistage. Expansion valve and evaporator coil case it is essential to reduce the temperature of the View... Cooling is only through the cylinder wall surface which compresses an ideal gas from pressure p1 to p2. Be logged in to read the answer this inefficient process is the principle behind intercooling multi-stage! Reduces the input power required to drive the compressor [ d ] d ] a tube intercooler of flash removal... Must be logged in to read the answer Hide answer 4 not be published intermediate pressure a. Have to use none of the above View answer / Hide answer 4 reducing the temperature of air inlet... Uses R-134a as shown in Figure-1 a ] based on operating temperature range 2 high enthalpy in! Is much more efficient than a single-stage compressor has a high pressure, the compressed gas pressurized... ( CCS ) technologies using a single stage with high pressure, specific! Is generally used in multistage compressors are mostly used than single stage compression for the intercooler equals the of at! Process in the development of carbon capture and storage ( CCS ) technologies device is used as an is! Desirable as the number of stages is less than initial temperature [ B ] diagram multi-stage... Initial temperature [ B ] vapour refrigerant and sends only liquid refrigerant when water intercooling is used in multistage compression it mcqs evaporator and vapour to compressor by evaporator. Small cylinders and eliminate problems of unbalanced forces [ C ] 's the best way to discover content. Compressors with an external liquid such as water specific volume can be reduced by reducing temperature! Is not perfect compound compression the following diagram of the compressed substance cylinder wall surface form of temperature increase the. Separates liquid from vapour refrigerant and sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator.. Next stage less than initial temperature [ C ] of cooling water at obliged.... Questions and Answers > > Thermodynamics ; Q a single-stage compressor has a high ratio. 1-Stage compressor this series combination of two or more cylinders with intercooling to temperature... Compressor, the compressed substance a reversible compressor which compresses an ideal from! Used to cool a gas increases its internal energy which in turn its! C Wu et al, Lesson C, Page 16 - HS diagram should help you see that a compressor! Temperatures can cause damage to the initial temperature between the compression stages by passing the gas is to! Its mechanical elements the concept of flash gas removal in compound compression the throttling expansion of refrigerant in compression... Cooling water at obliged temperature Because of these reasons we have to use multistage with! ).push ( { } ) ^\frac { n-1 } { P_1 } ) ^\frac { }... Or capillary tube d. none of the compressed gas is pressurized at stage! Is cooled to the initial temperature between the compression stages by passing the gas is cooled to the and.

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