The log ph diagrams on this page can be retrieved from the coolpack program, which can be downloaded here. Dupont freon 12 saturation properties figure 8 is a simplified ph diagram illustrating the constant temperature lines. The pressureenthalpy diagram or ph diagram is a tool that all hvac and refrigeration engineers should be able to use proficiently. Apr 10, 2012 made by faculty at the university of colorado boulder, department of chemical and biological engineering. Case1 the basics of refrigeration cycle ph diagram analysis. The process transforming a mollier diagram to a psychrometric chart is shown below. Drybulb temperature tdb dry bulb temperature is usually referred to as air temperature, is the air property that is most common used. The molecular weights m o f refrigerants r4a, r1234yf and r1234zee are s imilar. It is a chemically stable product with low temperature glide and low toxicity. This refrigerant presents a low critical temperature tc 31. Jul 21, 2019 dupont r4a ph diagram filetype pdf dupont freon 12 saturation properties temperature reading comprehension thermodynamic propertiesfigure a14 p h diagram for refrigeranta. Pressure enthalpy diagram melting line40 o 40 c2 02 0. Apr 16, 2020 dupont r4a ph diagram filetype pdf dupont freon 12 saturation properties temperature reading comprehension thermodynamic propertiesfigure a14 p h diagram for refrigeranta.
Pdf plotting of ph and ts diagrams of fluoropropylenes. This information is based on values calculated using the nist refprop database mclinden, m. Reviewed by faculty from other academic institutions. The areas between the curves define the limits of temperature and pressure at which different phases can exist. Positively innovative r32 daikin chemical europe gmbh. Thus the p h diagram is a widely used and very useful tool for doing an approximate evaluation of a refrigerator or heat pump system.
H 2 o mollier diagram pressureenthalpy diagram based on the scientific iapws95 formulation mollier chart in metric units excel file 342 kb. Figure 4 is a pressureenthalpy diagram of a typical refrigeration cycle in a system with one pound of hfc4a. In fact, in the official reference handbook supplied by the ncees to be used in the fundamentals of engineering exam, only the p h diagram is presented for r4a. Beberapa jenis refrigeran sudah tidak dijual karena alasan merusak lingkungan. The psychrometric chart is a variant of the mollier diagram used in some parts of the world. The ph diagram and the refrigerant flow diagram are as the following.
Scroll down to find download buttons for pressure enthalpy charts in either metric or imperial units. How can i plot the ph diagram for my system using ees. Thermodynamic constants of 1,1,1,2tetrafluorethane r4a c 2 h 2 f 4. The lo g ph dia gram is better suited to represent the re frigeration cycle than the ts diagram and is therefore used predominantly. Figure 42 ph diagram for the refrigeration system figure 43 refrigerant flow diagram for the refrigeration system. The vapor is compressed, following the constant entropy line to the pressure cor. Modified rankine cycle on pv diagram for steam engines. In order to properly understand this diagram, it is best to go through the vapor compression. This case is also to evaluate various cycles such as with penalties, economizing for a. Figure a9 ts diagram for water figure a10 mollier diagram for water table a11 saturated refrigerant4a temperature table table a12 saturated refrigerant4a pressure table table a superheated refrigerant4a figure a14 ph diagram for refrigerant4a figure a15 nelsonobert generalized compressibility chart. This page shows log ph diagrams for the following refrigerants. It uses for this example evaporating and condensing temperatures of 0f and 120f.
The expansion device is the counterpart of the compressor. Figure a9e ts diagram for water figure a10emollier diagram for water table a11esaturated refrigerant4a temperature table table a12esaturated refrigerant4apressure table table aesuperheated refrigerant4a figure a14eph diagram for refrigerant4a table a16eproperties of the atmosphere at high altitude. Thus the ph diagram is a widely used and very useful tool for doing an approximate evaluation of a refrigerator or heat pump system. Figure a14eph diagram for refrigerant4a table a16eproperties of the atmosphere at high altitude table a17eidealgas properties of air table a18eidealgas properties of nitrogen, n 2 table a19eidealgas properties of oxygen, o 2 table a20eidealgas. The aim of this research is to find the alternative refrigerant of. Thermodynamic properties saturation table 1415 contents. Each step of the cycle can be approached separately. Positively innovative r32 instructions for use and handling refrigerants r32. Made by faculty at the university of colorado boulder, department of chemical and biological engineering. How to read p h chart explained with numerical youtube. Enthalpy kjkg 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 pressure bar 0,50 0,60 0,70 0,80 0,90 1,00. From p h diagram for r we read after evaporator h kj kg kj kg from catt.
Figure a14 ph diagram for refrigerant4a figure a15 nelsonobert generalized compressibility chart table a16 properties of the atmosphere at high altitude table a17 idealgas properties of air table a18 idealgas properties of nitrogen, n 2. The curves break up the diagram into three regions 1 liquid, 2 vapor and 3 mix. P h diagram r4a pdf p h diagram r4a pdf p h diagram r4a pdf download. Sep 29, 2010 refrigeran yang biasa di pasaran antara lain r22, r4a, r12, dan lainlain. Points on the diagram are labeled to correspond to locations of equipment in the system. Ada banyak jenis refrigeran, setiap refrigeran memiliki diagram ph yang berbedabeda. The pressureenthalpy diagram or p h diagram is a tool that all hvac and refrigeration engineers should be able to use proficiently. Dupont r4a ph diagram filetype pdf dupont freon 12 saturation properties temperature reading comprehension thermodynamic propertiesfigure a14 ph diagram for refrigeranta.
Starting a system with liquid refrigerant in the compressor. Because energies exchanged with the refrigerant modify the enthalpy h of the refrigerant, energy flows can be read directly from the diagram as horizontal lines. Figure 6 p h diagram of the ideal vapor compression cy cle for refrigerants r4a, r1234yf and r1234ze e. Refrigeran yang biasa di pasaran antara lain r22, r4a, r12, dan lainlain. Walaupun refrigeran memiliki diagram p h yang berbedabeda, namun pola siklus refrigerasinya sama dan dengan cara yang sama pula dapat diketehui dan analisis besaranbesaran tersebut. The saturated vapor entering the compressor suction would be at 20.
This diagram describes the relationship of pressure and enthalpy of a select refrigerant. Technical r410a data sheet features and uses of r410a r410a is an almost azeotropic mixture composed of r125 and r32, it is currently used primarily in new air conditioners that are appearing on the market. R22 properties of r22 vapor volume, enthalpy and entropy at pressures. Ts diagram of stirling cycles a and ericsson cycles b. Untuk melihat besaranbesaran seperti tekanan, suhu, enthalpy dalam siklus refrigerasi biasanya digunakan diagram ph refrigeran tertentu. Thermodynamic properties of duponttm freonr 12 r12. Feb 01, 2018 this lecture will explain how to use p h chart for calculating cop, heat rejected by condenser, refrigerating effect, compressor power. The refrigerants studied are r4a, r152a, r1234yf, r404a, r407c, r410a and r507a. Pressure enthalpy diagram melting line40 o 40 c2 02 0 t 0 o c 0 0 20 40 40 60 60 80 80 100 100 120 120 140 140 160 160 180 180 200 200 220 220. R4a pressure enthalpy chart the engineering mindset. A suitable range of the mollier chart has been selected for actual. In fact, in the official reference handbook supplied by the ncees to be used in the fundamentals of engineering exam, only. P h diagram of refrigerant r1234zee the d irect s earch of feasible d irections d sfd algorithm a nd software has b een used for optimization 14. Ph diagram of refrigerant r1234zee the d irect s earch of feasible d irections d sfd algorithm a nd software has b een used for optimization 14.
First it has to be reflected in a vertical mirror, then rotated 90 degrees. Jul 07, 2019 dupont r4a ph diagram filetype pdf spiritual july 7, 2019 dupont freon 12 saturation properties temperature reading comprehension thermodynamic propertiesfigure a14 p h diagram for refrigeranta. Properties of refrigerant r22 saturated liquid and saturated vapor both imperial. Thermodynamic properties of r22 at saturation english units p.
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