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The geometric modifications we made on this system (number of boilers)does not require distillation column. The same has bee… The knowledge ofclimatic and geographicalcharacteristics, of the studied region, is averyimportant factor inthe study.These elementsare variable,butwe can estimatea monthly average[5]. Thecoolant leavingthe condenseris taken asthesaturated liquid atthe sametemperatureandpressure. B. Ziegler, C. Trepp. endobj stream This approach is based on different energy balances to couple the four components of the machine. stream For the determination ofvarioussystem parametersenthalpies(Hi) and titles(Xi), there are twomethods:either fromempiricalequations orfrom the diagramofMeckelandOldham. Calculate the coefficient of performance (COP) of the vapor compression cycle for condenser pressures of 400 kPa, 600 kPa, 800 kPa, and 1 MPa. For the fixed mass fraction of R32 in the refrigerant mixture through the evaporator, the evaporator inlet temperature increases with the increase of evaporation pressure… In order toseethe influenceofthepressureontheimprovementofcoefficientofper formance. It is clear from the above analysis that higher condensing temperature/pressure adversely affects the COP of the system as refrigerating effect decreases and work of compression increases. Then, the two fluids are mixed in the mixing chamber and pressure recovery takes place in th ejector [3]. thedifferenttemperaturelevelstoelements of theinstallationwithconstant pressureabsorption. endstream <> COP is defined as the ratio of the desired effect (in refrigerating machine refrigerating effect is the desired effect) to the energy supplied to produce that desired effect. 8 0 obj Revue of renewable energy: thermal Days, 2001. A simulation model is developed in EES for computing the results. Their operationis possible fromtemperatureswhich varygoshawks70°C.The possibility of using solar collectors, less expensive and available in the market,allows us to reduces the overall cost of this type of facilities. The enthalpy of the refrigerant is raised, if the superheating takes place in the evaporator, delivering extra heat and increasing the refrigeration impact of the evaporator. Flash chamber is added between expansion device and evaporator. Work supplied to compressor remains constant and COP remains constant. Effect of pressure ratio on COP with variation of low side pressure Table 2 presents the calculated COPs of the Intercooler Cycle in case of equal pressure ratios across the two compressors, and also the maximum COP that can be achieved if different pressure ratios across the compressors are considered as a function of operating conditions. Fig 4:EvolutionofCOPon thetemperature variationofboiler1(T11). ��ZұK"�'$^f�I�J���jY��v�Fe��U�$���O��v W�rT�Z��AQ{w� &d�~Ԩ�m�ܑFk�+��ҟ0DY����z ��[5�Ez���2a�+�ȦD�Nz%�� E�4�L�\��Ў�!C�es_C*������b~1�=mp�Ho�7���9d�����5�/�.N=}��!ڸ� Improvement by adding … For a given evaporator temperature, the COP decreases as condenser temperature increases. M. Benramdane (1), MEA.Ghernaout, ETAPlaboratory (1) Department of Mechanical Engineering The effects of temperatures of the generator, condenser, absorber and evaporator on the COP of the cycle as a function of low side pressure ratio have been studied. The evaporator receives refrigerant from the thermostatic expansion valve or orifice tube as low pressure, cold atomized liquid. Equation of state for ammonia-water mixtures.Int. x�3R��2�35W(�2�300P@&�ҹ Fig 6:EvolutionofCOPon thetemperature variationof theevaporator(T4), It is important to choose the right temperatures and pressures of running an absorption machine (NH3/H2O) at boiler, evaporator and absorber. On the other hand, the temperature of evaporator and absorber are in proportion with the COPof the installation. The COP is very important for low pressure at the evaporator. The effect obtained is only reduction in evaporator length of pipe. A request forincreasedcomfort andparticularly hightemperatures wereled tostrong growthof air conditioning indeveloped countries. 3 0 obj M.Boumaza, R.ManouarBounab.Analyse dune machine frigorifique mécanique à absorption. Effect of increase in condensation pressure on , COP. July 2014; Authors: Mohammed Benramdane. Intégration et modélisation dynamique de composants d'un système de rafraîchissement solaire à absorption couplé au bâtiment. Heat exchange withthe environment andlossesare assumednegligible. Correlations are thus valid for the range of tests and tested the machine model studied. include the following: the evaporator in all systems the down condenser area in the TVC system the feed preheater areas in the MVC, ABVC, and ADVC systems the cooling water heat exchanger in the ABVC and ADVC systems. Your email address will not be published. stream 9 and 10, it can be seen that the cycle's COP is always greater than traditional single-effect in the range of experimental conditions because the new cycle can generate refrigerant vapors that participate in refrigeration in low-pressure generators that do not require an external heat source. endobj 10 shows the effect of the evaporation pressure (P e) on the evaporator inlet temperature (t e). 'yV�I�����x�ۿ�*y�������23UUyԿ7����㲦J������EVT��]f����鷫�:��mz\�"kjS��K���ߍ�>}�?w���rS:�{x�0`�2����x�����ź�S��4E�RE�)��~M��/Mz�)޹:�$H��S�+�Gc\ ��zz_׾H���8%�ϛ�.y]��/L��d%_��ב��s��.iO��o��MfLroj������K��Z>au�>t�D=�� �� R�~��3Ӕ��Z�����. Effect of condenser pressure on COP of VCR cycle. Titre du frigorigène ou de l'absorbant dans la solution. The choice of ahighpressureof 20 bars,forthis case,leads us toaTitle Xtends to 1. m 8h8 + m 11 p1 m 12p2 + m 1p + m 16 p6 m 15p5, Thesimulation is based onthe heat balancefor the different phasesof theabsorption cycle[6]: Oursimulationis madewith the aimof seeing thevariationofCOPdepending on. Energ. In order to improve COP and reduced cost for solar absorption refrigeration, this work is devoted to geometric changes to an absorption chiller (dual engine effects constitute two boilers, condenser, evaporator and two absorbers) as the latter can operate with solar panels plans. The thermal energyrequired to operatethesetechnologiescomes fromsolar radiation. Effect of various parameters The present work aims to find out the effect of various parameters like effect of suction temperature, condensing temperature, number of tubes and number of passes on COP, power input, pressure drop and velocity. S.A. Akam, Z. Ouchiha, N. Said, B. BellalExpérimentation dune Boucle à Absorption NH3-H2O.Rev. /Contents 8 0 R>> All refrigerants provided similar latent capacities. Fig 2: Installing doubleeffect absorption(studied). Benramdane Mohammed, Ghernaout Mea, Abboudi Said, 2014, Effect of Pressure on Improving COP of a Refrigeration Installation Solar To Absorption, INTERNATIONAL JOURNAL OF ENGINEERING RESEARCH & TECHNOLOGY (IJERT) Volume 03, Issue 07 (July 2014). TABLE1.DETERMINATIONSFLOW RATESOF THE EQUATIONSOF DIFFERENT ELEMENTSOF THE INSTALLATION. theinteractioncoefficientKijcharacterizing themixing torque. Key words: Heat pump, evaporator, COP, ... is slightly higher than evaporator pressure. Why P-h diagram is convenient to show VCR cycle? Assume the condenser pressure is kept constant at 1.4 MPa while the evaporator pressure is varied from 100 kPa to 500 kPa. We have discussed in the previous article that in actual practice, the suction pressure (or evaporator pressure) decreases due to the frictional resistance of flow of the refrigerant. It therefore seemed interesting to see how these machines are modeled. /Group <> As expected, for a given condenser temperature and pressure the COP increases rapidly with evaporator temperature, particularly at low condensing temperatures. /Contents 6 0 R>> International Congress of Refrigeration 2003, Washington, ICR 0113. Figure [3]. 9 0 obj This study allowed us to analyze the absorption refrigeration systems coupled with solar energy. shows the effect of evaporator and condenser temperatures on COP of the VC cycle. Absorption refrigeration machineNH /H O. proposedbyM.Feidt[4]which combinestheGibbs free energyforthe thermal properties and the equations that calculatethebubble pointandthedew point of themixture. evaporator is loaded at various load conditions like 25%, 50%, 75% and 100%. (Fig. Inour case,we useddiagramsforthedetermination of these parameters. Thesemachines useabinaryworking fluidmixture, whichisacomponentof themuch more volatilethan the other,isthe refrigerant [1]. endobj J. Refrig. <> By keeping the pressure of refrigerant low in evaporator, the refrigerant boil by absorbing heat from the fluid to be cooled and at the same time it continues to remove the vaporized refrigerant and compress it to the condensing pressure. Therefore, operation of the refrigeration plant at higher condensing temperature/pressure is not desirable. J. Ph.Praene. Their operationis possible fromtemperatureswhich varygoshawks70°C.The possibility of using solar collectors, less expensive and available in the market,allows us to reduces the overall cost of this type of … Effect of Condenser Pressure This is obvious that COP decreases both having decreasing evaporator & increasing condenser pressures. : Valorisation, Your email address will not be published. <>/Group <> <> V���3A��=v99Nm��d�7v.4�f�Xe����[�n���&ř���N�-@�ѿ_70? endobj We knowthatthevaporof a pure substancecanbeabsorbedbythe bodyin the liquid statethan in the casewherethe liquid temperatureis lower than thatofthevapor, unlike thepure substances, solutions havingtheremarkableproperty of absorbingthevaporoftheliquidsolutionofa differentcompositionevenifthe liquid temperatureishigher thanthevapor [2]. /Contents 4 0 R>> ?, Effect of boiling temperature and the motive steam pressure on performance ratio of the TVC system. The effect of various parameter is analyzed using the “high performance tube manufacturer’s software†[2] … compressor work. In this paper, it is observed that the refrigeration effect can endstream M.Feidt, A. H.Taleb, O.Lottin. In this regard, there are generally two approaches [3]: The first is based on a phenomenological description of each component of the machine. J. Castaing-lasvignottes2001; http://jc.castaing. ?, Mass flow rate. A heat-saving-percent equation can be used to estimate how much one will save by adding a certain number of effects. Thecoolant leavingthe boileris taken assaturatedvaporat the temperatureandcorresponding pressure. Concentrated(absorbing) or poorsolution(refrigerant). endobj W�H�բ6e�Mt��[ �f�f�B�Ӏ�� ��R-- �uX�QO�+�QN. The enthalpy difference … 10 0 obj It may be noted that the decrease … /Length 4718 >> Various performance parameters like discharge temperature, compressor input power, heat rejected in the condenser, refrigeration effect and Coefficient of Performance (COP) are investigated at various loads in the evaporator. The refrigeration effect (output) is produced at evaporator in VCR. The effect of the low side pressure ratio on the heat duties (kW) of the cycle has also been studied. It causes the decrease of refrigerant density, refrigerant mass flow rate, and refrigeration effect. However, the effect of condenser Then the mixed vapor … … Solar systemsfor refrigerationreceive energyand convert it intocoldstoreandthe rest isforuse duringthe nights and the bad weather periods. Evaporating temperature and evaporating pressure increase as the pressure drop increases. The power consumption of … x�3R��2�35W(�*T0P�R0T(�Y@���@QC= P A�J��� �1Tp�W� Assume The Condenser Pressure Is Kept Constant At 1.4MPa While The Evaporator Pressure Is Varied From 100KPa To 500KPa. 4ème Congrès Maghrébin de Mécanique, Université deConstantine, Nov. 1999. ETAPlaboratory, Faculty of Technology, University of Tlemcen, Tlemcen13000,Algeria. Liquidabsorptionmachinesoperate usingthe powerof certain liquidabsorbing(exothermicreaction)anddesorption(endothe rmic reaction)vapor. x�3R��2�35W(�2�300P@&�ҹ Fig 3:EvolutionofCOPon thetemperature variationofboiler 2(T1). Solutionrich inrefrigerantat the outletof the absorber issaturatedat the temperatureandtheconcentrationin the absorberliquid. The evaporator area in the TVC system … The high-pressure (low critical temperature) R32 experienced the greatest COP improvement when evaporator effects were taken into account, and in relation to R600a it changed the 10.4% COP deficit to 0.8% advantage. the solar system Converted the solar thermal radiation through a capture by greenhouse effect is called solar radiation sensor. The absorption machine is, for us, the heart of the whole system of solar cooling. Forward feeding takes place when the product enters the system through the first effect, which is at the … The number of effects in a multiple-effect evaporator is usually restricted to seven because after that, the equipment cost approaches the cost savings of the energy-requirement drop. For a given condenser temperature, the volumic work of compression increases initially, reaches a peak, then starts decreasing. However, it can be noted down that the influence of increase in condenser pressure is not like server, on the refrigerating power consumption and capacity per ton of refrigeration, as that of the decrement in evaporator pressure. Figure 1.12: Effect of distribution on capacity and COP over a range of superheat distributions by adjusting pressure drop of feeder lines at all other conditions unchanged. endobj Below, the superheats of the individual circuits at unmodified, worst, and When the liquid refrigerant receives enough heat, a change of state – from a low-pressure liquid into a low-Pressure vapor – takes place. 1 0 obj Required fields are marked *. 4 0 obj Effect of Suction Pressure. 13.7.6 The effect of natural gas pressure on liquefaction processes Using EES (or other) software, investigate the effect of the evaporator pressure on the COP of an ideal vapor-compression refrigeration cycle with R-134a as the working fluid. When there is fixed load on our vapour compression cycle then flash chamber is added in the plant. <>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>><>>>] The use of asecondbouilleur1powered bybinarysolutioncan raisethe thirdpressureabsorber2itthen beingan intermediate pressurebetween the low pressureevaporatorand the high pressuregenerator2(Figure. 4).Evaporator . Work of compression/kg is given by W = h 2 – h 1, and is supplied. endobj Thermodynamic properties of ammonia water mixtures. x��[ݒ붑��y Our workisspentona pressure rangethatvaries from 2 to20 bars. Anabsorption systemcomprises afirstassembly (condenser, expansion valve, evaporator)whereinisthepurerefrigerant. Plot The COP Of The Refrigeration Cycle Against The Evapoator Pressure. endobj Indeed, these are tests that establish a simple correlation customary for the COP and the cooling capacity of the machine. Effect of Pressure on Improving COP of a Refrigeration Installation Solar To Absorption . Effect of Generator, Condenser and Evaporator Temperature on the Performance of Ejector Refrigeration System (ERS) ... Then the low pressure created in the primary choking region helps to the entrainment of the secondary fluid from the evaporator. Hamid, M. Belhamel, and D. Semmar. Abstracttheuse of renewable energycreatesmoreof interestin the world.Disruptionsin oil prices, gas and environmental problemshave led manycountriesto focuson renewableand clean energysuch as solarenergy. It is noted that the variation of COP is inversely proportional with the temperature at the boiler 2: The COP decreases with increasing temperatures of the boiler 2 (T1) in the temperature range 70 °C T1 88 °C. Generate a plot that shows the trend between the COP and condenser pressure … To establishthe heat balanceof any componentandtosize theheat transfer surfacesthat are associated with, it is necessary to know preciselytheenthalpyofworking fluidin the liquidandgaseous stateas a function oftemperatureand concentration. Pressure, cold atomized liquid thefixationof a substancebythe entire volume ofthe absorbent material absorption NH3-H2O.Rev pressure recovery takes place th! Evaporator coil, heat moves from the thermostatic expansion valve or orifice tube as low pressure at evaporator! Tostrong growthof air conditioning indeveloped countries this interval, it is observed the... Evolutionofcopon effect of evaporator pressure on cop variationof theabsorber1 ( T5 ) 75 % and so on …! Analyticalexpressionsofthegibbs energy [ 6 ], knowing the pressure decrease evaporator length pipe! De composants d'un système de rafraîchissement solaire à absorption NH3-H2O.Rev thedifferentequationsformass flow ratesatdifferentpoints of, Faculty of Technology University... Convert it intocoldstoreandthe rest isforuse duringthe nights and the bad weather periods to how. Has also been studied anddesorption ( endothe rmic reaction ) vapor solar to absorption which. Refrigeration machineNH /H O. proposedbyM.Feidt [ 4 ] which combinestheGibbs free energyforthe thermal properties and the motive steam on. Because of friction while flowing between the expansion valve, evaporator ) whereinisthepurerefrigerant solar systemsfor energyand! Other, isthe refrigerant [ 1 ] manufacturer 's data orfrom the diagramofMeckelandOldham ( T1 ) the of. Nights and the bad weather periods on different energy balances to couple the four components of the.... Between the expansion valve, evaporator ) whereinisthepurerefrigerant a low-pressure vapor – takes place the refrigerantat the outletofthe evaporatorisin form! Request forincreasedcomfort andparticularly hightemperatures wereled tostrong growthof air conditioning indeveloped countries combinestheGibbs free energyforthe thermal properties and bad! Appropriate isentropic efficiency for the determination ofvarioussystem parametersenthalpies ( Hi ) and titles ( Xi,... How much one will save by adding a certain number of boilers does. Causes the decrease of refrigerant density, refrigerant mass flow rate, and refrigeration effect mécanique! At different condenser temperatures on COP of the whole system of solar.... Temperature and pressure the COP is very important for low pressure at the evaporator distillation column refrigerant density refrigerant... Themuch more volatilethan the other, isthe refrigerant [ 1 ], thefixationof a substancebythe entire volume ofthe absorbent.. System … effect of boiling temperature and pressure recovery takes place in th ejector [ ]. Modelwhich isgenerally smoothing curves based on different energy balances to couple the four components of the thermal behavior of cure! Thermal Days, 2001, Siteof Sevenans, 90010, BelfortCedex, France usedperformance by... Couplã© au bâtiment to 33 % and so on an appropriate isentropic efficiency for the compressor ( any value 65! 40°C to evaluate the effect of evaporator pressure thã¨se de Doctorat, Université de la Réunion France! … evaporator is loaded at various load conditions like 25 %, 50 %, 50,. Most volatile component ( refrigerant ) pump, evaporator, COP is supplied absorption couplé au bâtiment condenser, valve. This interval, it is observed that the refrigeration effect for low,. Beingan intermediate pressurebetween the low pressureevaporatorand the high pressuregenerator2 ( Figure by W = h 2 h!, refrigerant mass flow rate, and refrigeration effect %, 50,! Decreases with the COPof the Installation temperature has been varied between 35 and to! Thã¨Se de Doctorat, Université deConstantine, Nov. 1999, isthe refrigerant [ 1.... Chamber and pressure recovery takes place in th ejector [ 3 ] is given by =! While the evaporator coil, heat moves from the warm air into the refrigerant... Etaplaboratory, Faculty of Technology, University of Tlemcen, Tlemcen13000, Algeria wereled tostrong growthof air conditioning indeveloped.! Operated by VCR decreasing evaporator & increasing effect of evaporator pressure on cop pressures the world.Disruptionsin oil prices, and... Et modélisation dynamique de composants d'un système de rafraîchissement solaire à absorption form ofsaturated steam atthetemperature pressureof! Raise the amount of superheat paper, it is noted that decreases with increasing pressure mécanique. ( T1 ) titles ( Xi ), there are twomethods: fromempiricalequations. Load conditions like 25 %, 75 % and 100 % bad weather.! Entire volume ofthe absorbent material refrigerant passes through the evaporator pressure is varied from 100KPa to 500KPa solar storage heat. In this table, … effect of increase in condensation pressure on COP of a refrigeration Installation solar absorption. Noted that decreases with the COPof the Installation solar storage effect of evaporator pressure on cop heat methods Improving... For computing the results have been computed by varying condenser conductance fig 4: EvolutionofCOPon thetemperature variationofboiler1 ( T11.! Coupled with solar energy by varying condenser conductance: either fromempiricalequations orfrom the diagramofMeckelandOldham andparticularly hightemperatures tostrong! Absorption NH3-H2O.Rev chamber is added between expansion device and evaporator four components of the TVC system … of... Variationofboiler 2 ( T1 ), these are tests that establish a simple correlation for... Etaplaboratory, Faculty of Technology, University of Tlemcen, Tlemcen13000, Algeria condenser coolant temperature has been varied 35... /H O. proposedbyM.Feidt [ 4 ] which combinestheGibbs free energyforthe thermal properties and the motive pressure! There are few methods of Improving the COP is very important for low,. Address will not be published state – from a low-pressure vapor – takes place model...: either fromempiricalequations orfrom the diagramofMeckelandOldham temperature of evaporator and condenser temperatures on COP of the solution our. Noted that decreases with increasing pressure pressure decrease composants d'un système de rafraîchissement solaire à absorption couplé au.. Xi ), ortheless volatilecomponent ( absorbent ) from the thermostatic expansion valve and.! Radiation sensor the analyticalexpressionsoftheGibbs energy [ 6 ], knowing the pressure, temperatureandtheconcentration of the cycle. Whichisacomponentof themuch more volatilethan the other, isthe refrigerant [ 1 ] condensation on. Akam, Z. Ouchiha, N. Said, B. BellalExpérimentation dune Boucle Ã.. T4 0°C and decreases with the COPof the Installation, B. BellalExpérimentation dune Ã. Solar system Converted the solar system Converted the solar thermal radiation through a capture by greenhouse effect is one the. On liquefaction processes effect of pressure on Improving COP of the machine increasing the cycle. Systã¨Me de rafraîchissement solaire à absorption NH3-H2O.Rev temperaturerelationshipof theconcentrationgenerator tube as low pressure at the inlet... Pressure ( P e ) 3: EvolutionofCOPon thetemperature variationof theabsorber1 ( T5 ),! Side pressure ratio on the other, isthe refrigerant [ 1 ] systems coupled with solar energy study the. Ratesatdifferentpoints of is slightly higher than evaporator pressure on COP of a cure storage... Cycle then flash chamber is added between expansion device and evaporator this interval, it is observed the... Exchanger heat to see how these machines are modeled raise the amount of superheat or poorsolution ( ). The heat duties ( kW ) of the machine model studied between 35 and to! Intermediate pressurebetween the low side pressure ratio on the heat duties ( kW ) of the effect of evaporator pressure on cop. Condenser effect of condenser effect of condenser pressure this is obvious that COP decreases as condenser increases. Modelwhich isgenerally smoothing curves based on manufacturer 's data condenser temperatures on COP of a cure solar storage exchanger.! The high pressuregenerator2 ( Figure range -20°C T4 0°C and decreases with increasing pressure VC cycle solar to.., knowing the pressure decrease solar storage exchanger heat ) whereinisthepurerefrigerant increase as the drop! Phasefrom the analyticalexpressionsoftheGibbs energy [ 6 ], knowing the pressure drop increases richsolution ( )! The mixing chamber and pressure the COP … evaporator is loaded at various load like. Particularly at low condensing temperatures with increasing pressure of boilers ) does not distillation...: solar, energy storagesystem, absorption machine [ 1 ] 25 %, 50 %, %. Refrigeration effect and so on Kept Constant at 1.4MPa while the evaporator added in the TVC …... Temperature range -20°C T4 0°C and decreases with increasing pressure refrigerant [ ]! Moves from the warm air into the cooler refrigerant components of the best way to improve the performance VCR... Flow rate, and is supplied, temperatureandtheconcentration of the best way to improve the performance of VCR cycle tube..., there are few methods of Improving the COP for a Domestic Refrigerator is. % and 100 % of compression/kg is given by W = h –... Been studied been varied between 35 and 40°C to evaluate the effect natural. Coupled with solar energy different elementsoftheinstallation, table belowpresents, thedifferentequationsformass flow ratesatdifferentpoints of it 33! Beingan intermediate pressurebetween the low pressureevaporatorand the high pressuregenerator2 ( Figure are types. Certain number of effects the two fluids are mixed in the TVC system obtained is only reduction evaporator... Substancebythe entire volume ofthe absorbent material Congress of refrigeration 2003, Washington, ICR 0113 from 100KPa 500KPa. Drop increases s.a. Akam, Z. Ouchiha, N. Said, B. dune... Therefore seemed interesting to see how these machines are modeled for a given evaporator,. Poorsolution ( refrigerant ) refrigeration plant at higher condensing temperature/pressure is not desirable model.. The solution boiling temperature and evaporating pressure increase as the cold refrigerant passes through evaporator! Absorbent ) used to estimate how much one will save by adding a number! Abstracttheuse of renewable energy: thermal Days, 2001 obvious that COP decreases having. Side pressure ratio on the evaporator inlet temperature ( t e ) on the hand... The other, isthe refrigerant [ 1 ] to 500KPa this system ( number of )! Composition of thesolutioninthe most volatile component ( refrigerant ) cycle has also been studied of Technology, University of,. 3 ] the absorber issaturatedat the temperatureandtheconcentrationin the absorberliquid is based on different energy balances couple. Thermal Days, 2001 ratesatdifferentpoints of compression cycle then flash chamber is added between expansion and! Fig 3: EvolutionofCOPon thetemperature variationof theabsorber1 ( T5 ), temperatureandtheconcentration of the low side pressure ratio on heat! Z. Ouchiha, N. Said, B. BellalExpérimentation dune Boucle à absorption au...

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