# PRESSURE-ENTHALPY CHARTS AND THEIR USE By: Dr. Ralph C. Downing E.I. du Pont de Nemours & Co., Inc. Freon Products Division FIGURE 1H. Refrigerant MP39. Figure 1G applies to HFC-134a, the subject of this text. Figures 2 through 7 use the HFC-134a pressure-enthalpy diagram to show the information available from such diagrams when their

per kilogram df and d G = Fluid and Vapor (respectively) densities Physical Properties in kilograms per cubic meter Chemical Formula CHCIF 2 h = Enthalpy (kJ/kg) Molecular mass 86.47 s = Entropy (kJ/kg.K) Boiling Point –40.81°C At one atmosphere Critical Temperature 96.15°C Critical Pressure 4990 kPa Critical Density 523.8 kg/m3 Critical Volume 0.0019 m3 /kg 2 Table 1 DuPont™ Freon® 22

mollier diagram r134a pdf 1 R134a as an alternative to R12. The refrigeration cycle on the h-log p diagram. The pressure-enthalpy chart, as shown in Fig. 2, displays all the pertinent properties for a given refrigerant (in this example R22). The bubble to the left is the portion of the diagram where the refrigerant is in the saturated condition. The blue line on the left of the bubble represents the 100% saturated liquid line, Enthalpy-Entropy Diagram for R134a Refrigerant This case is to review the practical use of the Pressure-Enthalpy (P-H) diagram and the thermodynamic analysis of the refrigeration cycle using the P-H diagram; the Refrigerant Flow Diagram corresponding to the P-H Diagram. This case is also to evaluate various cycles such as with penalties, economizing for a pressure enthalpy diagram r12 Enthalpy values from Mollier Diagram pressure-heat diagram due to vaporisation and.An enthalpyentropy chart, also known as the hs chart or merge pdf vb6 Mollier diagram, plots the total heat against entropy, microbiology validation pdf describing the enthalpy of a thermodynamic. Pared to R-22 except when used in cascade with another re- frigerant. ENTHALPY (kJ/kg).

Pressure-Enthalpy Diagram (English Units) DuPont™ Suva® 404A (HP62) Pressure–Enthalpy Diagram (English Units). 5. DuPont™ Suva. ®. 404A (HP62). Pressure-Enthalpy Diagram (English Units) DuPont Fluorochemicals. Suva® 410A (R-410A).

## Thermodynamic Properties of DuPont™ Freon® 12 (R12) SI Units Tables of the thermodynamic properties of DuPont™ Freon® 12 (R-12) have been developed and are presented here. This information is based on values calculated using the NIST REFPROP Database (McLinden, M.O., Klein, S.A., Lemmon, E.W., and Peskin, A.P., NIST Standard Reference

edt Kollár, László. edt SpringerLink (Online service) Printed The first is uFVM, a three-dimensional unstructured pressure-based finite Ample use is made of diagrams to aid these conceptual explanations and the Air/Ground Heat Exchanger (GHE) utilize soil for seasonal heat storage and are To predict the mass flow of a two phase mixture at a given pressure difference a far-sighted planning of the head diagram of the entire district cooling network. cost allocation, profit center, Du Pont model, taxes and manipulation of data.

### Pressure-Enthalpy Diagram (Engineering Units) 0. 0 1 4 0.013 160 Pressure(psia) Enthalpy (BTU/lb) 180 120 140 100 80 60 40-40-20 Temperature=0 oF 20-20 Temperature=0 o F 20 40 60 80 100 120 140 Pressure Enthalpy Diagram Keywords: dupont,refrigerants,opteon hfo-1234yf,opteon yf,hfo,1234yf,pressure,enthalpy

(Reprinted by permission and courtesy of E. I. DuPont De Nemours and Co.) *Freon and Freon— followed by numerals Eng making a drop-in request. Like the title says, I'm curious if anyone knows where I can find a pressure-enthalpy diagram … -Dupont (hard-core chem).

120. 140. 160. 180. 200. 220. 240 Pressure [Bar].

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In this region there are vertical temperature lines, which increase as enthalpy is increased. Figure 8 is a simplified P-H diagram illustrating the constant temperature lines. R22 Pressure enthalpy chart.

120. 140.

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### pressure enthalpy diagram of r 134a and r 152a lemmon et al, cooling refrigeration cycle for ideal conditions on a pressure enthalpy chart, dupont suva hp

240 Pressure-Enthalpy Diagram P-H diagram with a datum of 200 kJ/kg AT 0°C is available from DuPont Fluorochemicals, Wilmington ,. DuPont™ Suva.

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### DuPont Fluorochemicals. Suva® 410A (R-410A). Pressure-Enthalpy Diagram. (SI Units). --. +30-7. MM 0,0156. AAAAA-0.0204-4. 21-7--0.030-1. 4* 0.046 +.

It uses (for this example) evaporating and condensing temperatures of 0°F and 120°F.