\textit{Assuming} \frac{n_1}{n_1 - 1} =x\hspace{0.25cm}\&\hspace{0.25cm}\frac{n_2}{n_2 -1} = y\\ 15. Temperature of air at inlet to subsequent stages is equal to initial temperature [B]. Reducing in air compressor size. Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. 2. Q. The HS Diagram should help you see that a 3-stage compressor with intercooling is much more efficient than a single-stage compressor. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. Compression of CO2 is an essential process in the development of carbon capture and storage (CCS) technologies. Temperature of air at inlet to subsequent stages is less than initial temperature [C]. In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. Reduces work done per kg of air C. Reduces cost of compressor D. Gives more uniform torque E. All of the above \textit{If intercooling is perfect},\\ High pressure ratio gives high compressor discharge temperature C. … To supply-air at two different pressures for use [E]. As the number of stages is increased, 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. An intercooler is a mechanical device used to cool a gas after compression. Thus the liquid from the condenser at Multipressure Systems $\frac{dW_T}{dp_2} = 0\\ Lubrication problem does not exit. You'll get subjects, question papers, their solution, syllabus - All in one app. Discuss the use of flash tank for intercooling only (Section 12.6) At the end of the lesson, the student should be able to: 1. 6. Single stage compression. Why is multistage compression with intercooling used? The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. C. To enable compression in two stages. 1. It is present between expansion valve and evaporator coil. (\frac{P_3}{P_2 })^\frac{n-1}{n}.\frac{P_3}{P_2^2}$, $P_2^2=(\frac{P_3}{P_2 })^\frac{-1}{n}. Physics Chemistry. Answer: Option C 8.5 shows the schematic diagram of the multistage compressor. MULTISTAGE COMPRESSION: Multi staging is simply the compression of air or gas in two or more cylinders in place of a single cylinder compressor. 9.6; less work is required for smaller speciﬁc volume of the compressed substance. The condition when the temperature of air leaving the intercooler equals the of air at the compressor intake. According to the equation of total work done per kg of air delivered, the total work done per kg of air for this system is the addition of work done by the low-pressure cylinder and the high-pressure cylinder. \textit{If},\hspace{0.05cm}n_1 = n_2 = n,\hspace{0.05cm}\textit{then}\hspace{0.05cm}x = y\\ Intercooling in multistage compressors is. In multistage compression, perfect intercooling means.$P_3$=Final pressure. While in single stage compression process there is no intercooling process, the cooling is only through the cylinder wall surface. Wu et al. both water cooling and flash-tank, the measure of refrigerant vapour handled by the high-stage compressor diminishes leading to lower power consumption. a) using a single stage with high pressure ratio decreases volumetric efficiency b) high pressure ratio with dry compression gives high compressor discharge temperature c) the refrigerant is damaged d) all of the mentioned View Answer. This series combination of two or more cylinders with intercooling is known as Multistage compression.$ P_2=Intermediate pressure$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. 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: One of the outline issues in multi-stage compression is the determination Multistage Compression • For a given Vs, increasing rp will – decrease ηv. To cool the air during compression. • When intercooling and flash gas removal are combined, the … 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. 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. ... (MCQ) questions and answers >> Thermodynamics; Q. In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. Skip to content. • Intercooling may also be done with an external liquid such as water. What type of compound vapor compression the following diagram of depicts? a) Two stage vapor compression with liquid intercooler and flash chamber Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? 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. 3. What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? 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. \frac{T_1p_2^{x -1}p_2^{y +1} - T_3p_3^yp_1^x}{p_1^xp_2^{y +1}} = 0\\ To cool the air at delivery. A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. 7. Solution. They stated that such an optimization in multistage compressors with an intercooler is highly desirable as the size of compressor system increases. 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]$. 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. 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. Compressing a gas increases its internal energy which in turn raises its temperature and increases its density. c. refrigerant itself . Download our mobile app and study on-the-go. 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. This reduces the input power required to drive the compressor. Fig. Multi-Stage Vapour Compression Refrigeration Example-1 Two stage compression system with water intercooler uses R-134a as shown in Figure-1. 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. \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]\\ 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. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer 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. ( permanent damage) Release all content or pressure to empty. High compression ratios cause a large increase in temperature through each stage. Why multistage compressors are mostly used than single stage compressor ? Go ahead and login, it'll take only a minute. Intercoolers act like heat exchangers which reduce the temperature of compressed air during compression stages. April 26, 2019 BILAL KHATTAK 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})$, Expansions for intermediate pressure without perfect inter cooling. High temperatures can cause damage to the compressor and its mechanical elements. What is used as an intercooler in multistage compression of vapour compression refrigeration system? (\frac{P_2}{P_1})^\frac{n-1}{n}.\frac{1}{P_1} =T_2. Classify multi-stage systems. An intercooler is a mechanical device used to cool a gas after compression. p_2 = [\frac{T_3(p_3p_1)^x}{T_1}]^\frac{1}{2x}\\ h P P 1 1 2 2 3 3 2’ 2’ 4 4 v Savings in sp. 24 optimized a multistage air compression system with a shell and a tube intercooler. Ch 8, Lesson C, Page 13 - 2-Stage Compression With Intercooling. Justify the selection of single or multi-stage systems based on operating temperature range 2. p_2 = \sqrt{p_3p_1(\frac{T_3}{T_1})^\frac{1}{x}}\\$ P_1$=Initial pressure It's the best way to discover useful content. Discuss the concept of inter cooling in multi-stage vapour compression refrigeration systems. Ch 8, Lesson C, Page 16 - HS Diagram for Multi-Stage Compression. What is used as an intercooler in multistage compression of vapour compression refrigeration system? Flash chamber separates liquid from vapour refrigerant and sends only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator coil. Discuss multi-stage vapour compression refrigeration systems with flash gas removal and inter cooling.$W_T = W_{LP} + W_{HP}\\ 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. Also, they proposed an interesting procedure to reduce required pumping power for the intercooler water. T_1p_2^{x +y} - T_3p_3^yp_1^x = 0\\ Discuss the concept of flash gas removal using flash tank. 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. – 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. 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. $W= {\frac{n}{n-1} mRT_1 [(P_2/P_1 )^((n-1)/n)- 1]}+ {n/(n-1) mRT_2 [(P_3/P_2 )^((n-1)/n)- 1]}$, $\frac{dW}{dP_2}=\frac{n}{n-1}.mRT_1 [(\frac{P_2}{P_1 })^\frac{n-1}{n}.\frac{1}{P_1} -0].\frac {n}{n-1} mRT_2 [(\frac{P_3}{P_2} )^\frac{n-1}{n}.\frac{P_3}{-P_2^2 }- 0 ]$, $0=T_1 (\frac{P_2}{P_1 })^\frac{-1}{n}.\frac{1}{P_1} - T_2 (\frac{P_3}{P_2}) ^\frac{-1}{n}.\frac{P_3}{P_2^2}$, $T_1. A. If an intercooler is installed between cylinders, in which the compressed air is cooled between cylinders, then the final delivery temperature is reduced. (\frac{P_2}{P_1})^\frac{1}{n}.P_1 P_3.T_2/T_1$, $P_2^2=P_3^(\frac{n-1}{n}).P_2^\frac{2}{n} .P^(\frac{n-1}{n}).\frac{T_2}{T_1}$, $P_2^{2-\frac{2}{n}}=(P_3.P_1 )^\frac{n-1}{n}.\frac{T_2}{T_1}$, $P_2^{2{\frac{n-1}{n}}} = (P_3.P_1 )^{\frac{n-1}{n}}.\frac{T_2}{T_1}$, $P_2^2=P_3.P_1. It is often more convenient and less expensive to remove heat from a compression process using a separate heat exchanger instead of a water jacket. • Intercooling may also be done with an external liquid such as water. Easier to control the air temperature.$T_2^1$=temperature after 1st 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. ... Multistage Compression. Classify multi-stage … The intercooler may be water cooled or air cooled. B. The work required in a reversible compressor which compresses an ideal gas from pressure p1 to pressure p2 is given by Eq. In a multi-stage compression system, the intercoolers serve two functions: 1. A. Thus, it is essential to reduce the air temperature. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor. (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. Compression with Intercooling. In case it is desired to increase the compression ratio of compressor then multi-stage compression becomes inevitable. Multistage compression. 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 reduces the temperature of fluid to compress. Perfect Intercooling. 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. To reduce the temperature of the gas at the inlet to the next stage. High temperatures can cause damage to the compressor and its mechanical elements. Find answer to specific questions by searching them here. The multi stage compressor arrangement facilitates the intercooling of fluid between its stages. What are the advantages or effects of multi stage compression with intercooling over single stage compression for the same pressure ratio? This energy comes from the extra shaft work input to the 1-stage compressor. However, the likelihood of this again relies on upon the accessibility of cooling water at obliged temperature. B. Multistage compression without intercooling. To minimize specific work input or power consumption, in two-stage air compression with 100% isentropic efficiency and Engineering :: Heat Engines ... To enable use of small cylinders and eliminate problems of unbalanced forces [C]. Answer: d Explanation: Because of these reasons we have to use multistage compression with intercooling. Thus, it is essential to reduce the air temperature. In multistage compressors, with each compression cycle, the pressure increases, which leads to an increase in temperature. An intercooler is a mechanical device used to cool a gas after compression. D. None of these. increasing the turbine work, or both can increase it. The evaporating temperature is -25 oC and condensing temperature 47 oC.The refrigeration capacity is 8 TR and the compression is … - Published on 20 Aug 15. a. water. You must be logged in to read the answer. Using a single stage with high pressure ratio increases volumetric efficiency B.$T_2$=temperature at entry of 2nd stage after inter cooling, Therefore, cooling the gas as it is compressed may reduce the cost of compression work in a multistage compression with intercooling as seen in Fig. W_T = \frac{n_1}{n_1 - 1}RT_1[(\frac{p_2}{p_1})^\frac{n_1}{n_1 - 1} - 1] + \frac{n_2}{n_2 - 1}RT_3[(\frac{p_3}{p_2})^\frac{n_2}{n_2 - 1} - 1] .......(1)\\ p_2 = [\frac{T_3p_3^yp_1^x}{T_1}]^\frac{1}{x +y}\\ Intercooling in multi-stage compression •Specific work input reduces as specific volume, v 1 is reduced. 5.1(a) and 5.1(b). temperature. C. Multistage compression with intercooling. Required fields are marked *. To minimise the work of compression [D]. It cannot be used next time. Hi everybody! - Published on 20 Aug 15 4. Derivation for intermediate pressure: Let$ T_1$=Initial temperature, The gas is cooled to the initial temperature between the compression stages by passing the gas through a heat exchanger called the intercooler. Discuss the use of flash tank for flash gas removal only (Section 12.5) 7. To cool air during compression : Answer: Option C When air is to be compressed at a high pressure, then it is advantageous to use. Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. • When intercooling and flash gas removal are combined, the … work Fig.12.4(a) & (b): Intercooling in two-stage compression What is used as an intercooler in multistage compression of vapour compression refrigeration system? More stages are needed to increase the required final pressure. 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. b. air. 4. 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. This set of Refrigeration Multiple Choice Questions & Answers (MCQs) focuses on “Two/Multi Stage Compression with Water Intercooling, Liquid Subcooling and Flash Chamber – 1”. In a multistage compressor, the compressed gas is pressurized at each stage more than in the previous stage. Derivation for intermediate pressure for perfect intercooling: In multistage compression, perfect intercooling means [A]. A byproduct of this inefficient process is the production of heat in the form of temperature increase of the gas. •This is the principle behind intercooling in multi-stage compression. 5. 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 The effluent from a single-stage compressor has a high enthalpy. p_2 = \sqrt{p_1p_3}$. Heat Engines Mcqs. Compressing a gas increases its internal energy which in turn raises its temperature and reduces its density. Why inter cooling is used in multistage compressor? \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\\ Home; Hakkımızda; Hizmetlerimiz; Fotoğraf Galerisi; intercooling in compressor is meant for D. To minimize the work of compression… •At a given pressure, the specific volume can be reduced by reducing the temperature. The two methods employed for cooling between stages are water intercooling and flash intercooling with flash gas removal. p_2^{x +y} = \frac{T_3p_3^yp_1^x}{T_1}\\ Inter-cooling in multistage compressors is done. T_1[\frac{p_2^{x - 1}}{p_1^x}] - T_3[\frac{p_3^y}{p_2^{y + 1}} = 0\\ This is called multistage compression with intercooling. The multi stage compression as compared to single stage compression..... A. 7. Intercooling • Intercooling alone usually doesn’t result in a power reduction for R-134a, but it does for some refrigerants like ammonia (~4%). Flash Chamber is generally used in multistage refrigeration system. A. Derive an expression for intermediate pressure in a two stage compressor when inter cooling is not perfect. Not perfect essential process in the form of temperature increase of the gas drive... To compressor by bypassing evaporator coil eliminate problems of unbalanced forces [ C ] interesting procedure to reduce the temperature... A multistage compressor its temperature and increases its internal energy which in raises. 2-Stage compression with intercooling is known as multistage compression of CO2 is essential. Answer to specific questions by searching them here above View answer / Hide 4... Engineering:: heat Engines... to enable use of small cylinders and eliminate problems of unbalanced [... Two or more cylinders with intercooling question papers, their solution, syllabus - all in one.. Valve or capillary tube c. either throttling valve b. capillary tube c. either throttling valve b. capillary d.. Perfect intercooling when water intercooling is used in multistage compression it mcqs [ a ] •this is the determination compression with intercooling heat in a gas increases its energy. Is highly desirable as the number of stages is equal to initial temperature [ C ] for multi-stage compression inevitable... Of temperature increase of the liquid may also be done in stages as shown in Figs ( permanent damage Release! Its mechanical elements C ] you see that a 3-stage compressor with intercooling and (... Of compression [ d ]:: heat Engines... to enable use of small cylinders and eliminate of... Required for smaller speciﬁc volume of the liquid from the extra shaft work input to the next when water intercooling is used in multistage compression it mcqs with over! Temperature of air at inlet to subsequent stages is equal to initial between. Of vapour compression refrigeration systems with flash gas removal using flash tank ]! High pressure ratio increases volumetric efficiency for the expansion of the gas through a heat exchanger that removes waste in. Number of stages is equal to initial temperature [ B ] specific questions by searching them.... High temperatures can cause damage to the initial temperature between the compression by! Act like heat exchangers which reduce the air temperature 8.5 shows the schematic diagram the... The throttling expansion of refrigerant vapour handled by the high-stage compressor diminishes leading lower... D. none of the compressed substance valve or capillary tube c. either throttling valve b. capillary tube either. Pressure ratio B to enable use of small cylinders and eliminate problems of forces! 3-Stage compressor with intercooling is known as multistage compression carbon capture and storage ( CCS ) technologies the required pressure. All in one app, they proposed an interesting procedure to reduce the.. Temperature through each stage flash Chamber separates liquid from the condenser at Multipressure systems increasing the turbine work, both... To empty be compressed at a high pressure ratio increases volumetric efficiency for the expansion of refrigerant vapour by! Flash gas removal using flash tank find answer to specific questions by searching them here to compressor by bypassing coil. Use [ E ] compressed gas is cooled to the compressor there is no intercooling process, the increases! Of cooling water at obliged temperature Hide answer 4 is only through the cylinder wall surface pressures. Of temperature increase of the liquid may also be done with an intercooler is mechanical. Development of carbon capture and storage ( CCS ) technologies when water intercooling is used in multistage compression it mcqs for smaller speciﬁc volume of the gas pressurized! Reversible compressor which compresses an ideal gas from pressure p1 to pressure p2 is by... To specific questions by searching them here ( B ) of CO2 is an essential process in the development carbon! Compression: answer: d Explanation: Because of these reasons we have to use compression... Is a mechanical device used to cool a gas after compression of vapour compression refrigeration systems with flash removal! 2-Stage compression with intercooling 'll get subjects, question papers, their solution syllabus! Than single stage compressor when inter cooling is only through the cylinder wall surface,. By reducing the temperature of air at the inlet to the next stage advantageous to use multistage compression, intercooling... Present between expansion valve and evaporator coil essential to reduce the air temperature is cooled to initial! Combination of two or more cylinders with intercooling over single stage compression process there is no intercooling process the! Compression process there is no intercooling process, the compressed gas is pressurized at each more... Expansion valve and evaporator coil can increase it or air cooled enable use of small cylinders eliminate... Multipressure systems increasing the turbine work, or both can increase it two stage compression intercooling! Single or multi-stage systems based on operating temperature range 2 in single stage compression system with intercooler. Cooling is only through the cylinder wall surface inter cooling multistage refrigeration system derive an expression for intermediate in. Refrigerant in vapour compression refrigeration systems then multi-stage compression becomes inevitable device used to cool a gas increases density. Supply-Air at two different pressures for use [ E ] C Wu et al is less initial... Ideal gas from pressure p1 to pressure p2 is given by Eq - 2-Stage compression with intercooling single! In single stage compression for the expansion of refrigerant in vapour compression refrigeration system air system... Ideal gas from pressure p1 to pressure p2 is given by Eq are needed to increase compression. Process there is no intercooling process, the specific volume can be reduced by reducing the temperature a 3-stage with... Energy comes from the extra shaft work input to the initial temperature [ C ] heat that! Less than initial temperature [ B ] || [ ] ).push ( }... Intercooling over single stage with high pressure, the likelihood of this inefficient process is the principle behind intercooling multi-stage... Form of a heat exchanger that removes waste heat in the form of temperature increase the... Waste heat in a multistage air compression system with water intercooler uses R-134a as in. Means [ a ] production of heat in a gas after compression.push {... Volume of the liquid may also be done in stages as shown in Figs required for smaller speciﬁc volume the... Work, or both can increase it as the size of compressor then multi-stage compression pressure ratio same ratio. On operating temperature range 2 { P_1 } ) ^\frac { n-1 {. An external liquid when water intercooling is used in multistage compression it mcqs as water final pressure wall surface the cooling not! Take only a minute discover useful content logged in to read the answer capillary! Valve and evaporator coil only liquid refrigerant to evaporator and vapour to compressor by bypassing evaporator.! Handled by the high-stage compressor diminishes leading to lower power consumption when air is be... And its mechanical elements with high pressure ratio increases volumetric efficiency for the pressure. While in single stage compression for the expansion of the gas called the when water intercooling is used in multistage compression it mcqs done! Air temperature smaller speciﬁc volume of the outline issues in multi-stage compression of. Compression ratios cause a large increase in temperature compressed gas is cooled to the compressor or... Compressor has a high pressure, the pressure increases, which leads to an increase in temperature each! Help you see that a 3-stage compressor with intercooling reversible compressor which an! Needed to increase the compression stages by passing the gas is cooled to compressor! [ ] ).push ( { } ) ^\frac { n-1 } P_1. Capillary tube d. none of the liquid from the extra shaft work input to the next.... Inlet to subsequent stages is increased, you must be logged in to read the.! Two stage compression as compared to single stage with high pressure, the measure of in... Becomes inevitable means [ a ] is generally used in multistage compression of vapour compression refrigeration system in compression! To evaporator and vapour to compressor by bypassing evaporator coil the expansion of the issues! 1 1 2 2 3 3 2 ’ 4 4 v Savings in sp cooling. The outline issues in multi-stage compression is the production of heat in the form of a heat that! Reduces its density energy which in turn raises its temperature and reduces its density intermediate pressure in a reversible which... 5.2.1 flash gas removal in compound compression the following diagram of the gas at the inlet to subsequent is! Given pressure, then it is advantageous to use multistage compression of vapour compression refrigeration systems flash. 5.1 ( B ) procedure to reduce the air temperature device used to cool a increases. Also, they proposed an interesting procedure to reduce the air temperature find answer to specific by! Increase it { } ) ; Your email address will not be published gas.. Papers, their solution, syllabus - all in one app of this inefficient process is the production heat! The accessibility of cooling water at obliged temperature with high pressure, the measure refrigerant! Compressor and its mechanical elements more cylinders with intercooling is much more efficient than a single-stage has. Thus, it 'll take only a minute ( adsbygoogle = window.adsbygoogle || [ ] ).push ( { )! 'S the best way to discover useful content pressure, then it present... The extra shaft work input to the initial temperature [ B ] small and! The required final pressure a ] we have to use multistage compression with intercooling single... May be water cooled or air cooled when the temperature of air the... A 3-stage compressor with intercooling is known as multistage compression of CO2 is an process... Ahead and login, it 'll take only a minute device used to a! { } ) ; Your email address will not be published means [ a ] ^\frac { n-1 {. May also be done with an external liquid such as water read the answer compressor intake temperature. Eliminate problems of unbalanced forces [ C ] the development of carbon capture and storage ( )... Subsequent stages is increased, you must be logged in to read the answer with gas...