November 2016, Volume 3, Issue 11 JETIR (ISSN-2349-5162) A RECENT REVIEW OF REFRIGERANT R-1234YF AND R-1234ZE (E) 1 Prof.Pragnesh D. Kandoliya, 2 Prof.Nirajkumar C Mehta 1 A.P.M.E., 2 A.P.M.E. R1234yf Pressure Enthalpy Chart. The pressure was there [] Today, as I write this in October of 2017 there are Making its debut in the early 2000s it has quickly rose to power and will soon be the dominant refrigerant in the automotive industry. This category only includes cookies that ensures basic functionalities and security features of the website. Thermodynamic constants of 1,1,1,2-Tetrafluorethane - R134a - C 2 H 2 F 4 : For POE oil, the solubility order is R1234yf < R134a < R1234ze(E). R1234yf Pressure Enthalpy Chart. R1234ze (E) Pressure Enthalpy Chart. R1234ze (E) Pressure Enthalpy Chart. The term enthalpy is now more common than heat content. Columns 6 and 8 show the enthalpy values for liquid and vapor at Column 1 temperatures above 40F. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. These cookies do not store any personal information. LED Circuit Design- How to design LED Circuits, Transistor Explained- How Transistors Work, Full Wave Bridge Rectifier, Capacitor Filters, Half Wave Rectifier. Eng. This latter effect has resulted in a higher shaft torque required for the case of R1234yf, as shown in Fig. 1. specific enthalpy; specific entropy; In reality, there are good choices and bad choices of state variables. REFRIGERANTS P-H DIAGRAM - Refrigeration - The pressure-enthalpy diagram (log P/h diagram) is a very useful tool for refrigerant technicians, engineers and researchers. Since it's not always possible to have all of these diagrams together, we decided to give you this complete pack. These cookies will be stored in your browser only with your consent. Scroll down to find download buttons for pressure enthalpy charts in either Metric or Imperial Units. Enthalpy (kJ/kg) P r e ssu r e (b ar) Reference State: h = 200 kJ/kg, s = 1.00 kJ/kg-K sat. The polytropic index was calculated from pressurevolume ( PV) loop according to the data from measurements. The formulations used here to calculate moist air properties are based on perfect gas relations published in 1989 ASHRAE Fundamentals Handbook, which should be accurate. Vapor Density (Kg/m 3) HFO-1234yf R-134a Similar Capacity Lower H fg but Higher Vapor Density Triple-point pressure: pt = 611.657 Pa, (0.00611657 bar)Triple-point pressure: pt = 0.08871336 psi 9 A few years back there was immense pressure in the European Union to stop using the HFC R-134a for automotive air conditioning. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. liq at 0 C HFO-1234yf R134a Thermodynamic Analysis Typical MAC Condition 0 5 10 15 20 25 30 35-10 -5 0 5 101520 Temperature (oC) Sat. Vince Lynch-Feb 27, 2021 0. It has been proposed as a replacement for R-134a as a refrigerant in automobile air conditioners.HFO-1234yf is the first in a new class of refrigerants acquiring a global warming potential (GWP) rating one 335th that of R-134a (and only 4 times higher than carbon dioxide, which can also be used as a refrigerant but which has properties significantly different from those of R134A, especially requiring operation at around 5 times higher pressure) and an atmospheric lifetime of about 400 times shorter. Aksoy Apt. Introduction determination of thermodynamic properties as enthalpy, entropy, specific volume values for any temperature and Save my name, email, and website in this browser for the next time I comment. 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 80 100 120 140 200 220 240 180 160 260 280 300 320 340 200 220 240 260 120 140 160 180 80 100 40 60 20 0 2 45 e n t r o p y = 0 . Contact. But opting out of some of these cookies may have an effect on your browsing experience. You have entered an incorrect email address! liq at 0 C HFO-1234yf R134a 0 5 10 15 20 25 30 35-10-505101520 Temperature (oC) Sa t. Vapor Densi ty (Kg/m 3) HFO-1234yf ATEL Calculation ATEL (Acute Toxicity Exposure Limit) is a value used by 1234yf: Excellent Plastics Compatibility Equations displayed for easy reference. These system models are running more than twice the speed of the ones using Helmholtz energy EOS. It is mandatory to procure user consent prior to running these cookies on your website. Based on the pressureenthalpy (Ph) diagram of R1234yf and R134a, the pressure ratio, suction pressure, subcooling and superheat can be determined. Calculate Important Refrigerant Data On the Go. Nevertheless, It is strongly recommend that you to compare the results calculated by this worksheet with a psychrometric chart. Honeywells new Solstice ze Refrigerant (HFO-1234ze) is a sustainable alternative to traditional refrigerants for energy-efficient chillers and/or commercial air conditioning in supermarkets and commercial buildings, as well as in other medium-temperature applications like: . All vapor compression refrigeration systems produced newly are charged with the refrigerants that have zero ozone depletion potential (ODP = 0) today. Yf was the first HFO refrigerant to see mainstream attention. As with all P-h diagrams, the liquid saturation line J. Chem. Attempts at phasing out its use as a refrigerant with substances that have lower global warming potentials, such as HFO-1234yf are underway. The European Parliament has published a directive that bans refrigerants having a 100-year direct GWP ex 1234yf and other alternative refrigerants in air conditioning and stationary heating, and concluded that R-1234yf was having 57% less capacity and 7% higher COP than R-410a. COLUMNS 6, 7, AND 8: ENTHALPY Enthalpy means the same thing as heat content. Both terms refer to heat content in Btu per pound (Btu/lb). R1234yf during the early stage of the compression, when the specific volume of the gas is large.