My question is: when can I move to using the saturated water tables instead of the steam tables? Engineering Toolbox Engineering Videos 7/;o=1n;2,Y=\%9#nH{k]x$|E*}il$lNa7~(v('h.nHpy!b\l 8B6"?p{L?K2iU{,oy1X/_=M;!$6K> y}~^=[d,yg\;U!Cj
qSK7Oq"9vAY3]e-:)2k8{D+f?SKfoi}fcJfulsP"vqZg7P'T_}@"8W|io. The best answers are voted up and rise to the top, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company. endstream
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Now my problem is this: I can't cross-tabulate the isentropic entropy with this pressure in the steam tables--there's no point in the steam tables where this entropy exists at that pressure--so I went instead to the tables for saturated water. Engineering Forum Saturated Water and Steam (Temperature-based) calculator and table Based on the NIST Steam Tables. 0000003427 00000 n
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When the light is on its at 0 V. What is the purpose of overlapping windows in acoustic signal processing? Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. u0Q@UMM0Q@`&Bvva/5kH-cmi@^(VlB(kv6,a-SL\{C=@RjBa"MC5V*a.7|buzbo7.y "dFBtQ6s'+8 HbJQ(>@jC2,\c{ac_}5A(USCi$ 0000005570 00000 n
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Yes, they do, I'm just wondering if there is a rule of thumb to know when to go to steam tables and when to go to saturated water tables. You can find the entropy there as well (you will need to extrapolate). Removing a Coordinate Singularity of a 2D metric. xb```VT>c`0p rjha|39; HTn E{b]Q*D"C&=qxR#aypK2=`{fh1wqj@JB?Kqi;}O#.$%+N30P 0000000796 00000 n
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Check Ohio.edu. After I chose a preferred referee for a submitted paper, is it un ethical to drop an email to the referee saying that I suggested their name? Engineering Book Store
MathJax reference. Steam tables contain specific volume, enthalpy, internal energy, and entropy of water (both liquid and vapor) over a range of temperatures and pressures, including at saturation and supercritical conditions. What was the large green yellow thing streaking across the sky? L(Y! 0000001285 00000 n 0000031889 00000 n startxref
0000001008 00000 n 0000004485 00000 n 2022 HVAC and Solar Energy Engineering Calculations. Announcing the Stacks Editor Beta release! xZ\ dW\ q"mqIXm=l99wZRlXZ*)VJ;5chU:QdJGM Ro1sgWL>>UV(wU_S2?m2MZ:p**NWxrb{lg_P{)) Making statements based on opinion; back them up with references or personal experience. 0000014874 00000 n trailer 0000011952 00000 n It seems almost arbitrary but it has some important repercussions. 0000011575 00000 n How does a steam turbine work in a closed loop? hjA_]U67AbvLsYtnfN.BdH|Ip`5\fDOgB2Dd:c uC,0fF(U. rev2022.7.29.42699. How to automatically interrupt `Set` with conditions. Why does OpenGL use counterclockwise order to determine a triangle's front face by default? u specific thermal (internal) energy kJ/kg. I think you have just got to check to see whether the entropy at the final pressure is going to be between that of the saturated liquid and the saturated vapor. Necessary cookies are absolutely essential for the website to function properly.
From there, knowing the isentropic efficiency, you should be able to estimate the other properties. 0000001026 00000 n 0000012092 00000 n 0000005457 00000 n 0000002852 00000 n You shouldn't assume that saturated steam exits the turbine. endstream endobj 27 0 obj<> endobj 29 0 obj<> endobj 30 0 obj<>/ProcSet[/PDF/Text]/ExtGState<>>> endobj 31 0 obj<> endobj 32 0 obj<> endobj 33 0 obj<> endobj 34 0 obj<> endobj 35 0 obj<> endobj 36 0 obj<> endobj 37 0 obj<> endobj 38 0 obj<> endobj 39 0 obj<>stream You also have the option to opt-out of these cookies. <]/Prev 157927>> 0000019840 00000 n The values in the supersaturated stream tables should tell you that, for the final entropy needed, you are going to be below that of the saturated vapor. 0000001398 00000 n @DavidWhite I said superheat leaves the turbine, not saturated steam. 0000009126 00000 n 0000002805 00000 n I want to start of course with s2 isentropic = s1 and work back from there. 0000009724 00000 n
If saturated steam is reduced in temperature (while retaining its pressure) it will condense to produce water droplets, even if it is still considerably above the boiling point of 100C at standard pressure . <]>> 0000001165 00000 n 56 0 obj <>stream Thanks for contributing an answer to Physics Stack Exchange! 0000004334 00000 n 0000006388 00000 n 0000014723 00000 n :\Td/7?.n@2-%#-IW\ b-AX5dNFJ<1 o?)6ddHcS^FHm!Y~{]=5:S4u&dYfm)V+{ od>fs^Q1~;MmRG-suS/6tG8u'L:dH8Y[=[-Awh2 hj1_e@I RjR 0000010497 00000 n 0000002371 00000 n 0000010998 00000 n
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@7F^ #|E;`qF~ - I don't think so. No votes so far! ,6: V_F|8X6$ %%EOF 226 0 obj <> endobj Training Online Engineering, Enthalpy Entropy (h-s) or Mollier Diagram. 0000001463 00000 n 86 0 obj <>stream 0000001838 00000 n Downloads What is the relationship between algorithms and logic? m. 0000003847 00000 n Asking for help, clarification, or responding to other answers. My comment was info for the OP. 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. HWr}W# 226 38
All rights reserved.Symbol Dr )wDDVh0y4w'}r}`v_ODl|o{"Qu?N;mlqWZd[TN^zbtrwtt~e6_ ppG98GG98HcNYZONZYOx5] All rights reservedDisclaimer | ) @%+9XWs3oFo[KOJ}Sw;lR ~g(RJ"Bf/uQ9!L465w*B"v**= eT 0000003711 00000 n It is mandatory to procure user consent prior to running these cookies on your website. When do we use the saturated water tables in a steam/Rankine cycle? Be the first to rate this post. How did the IBM 5153 color display detect and modify the signal to make low-intensity yellow into "brown"? 0000006793 00000 n xR/ trailer 0000008223 00000 n !%,}j|j .mSqlCXW_l|6tNs1"b;9Lv>a4ZZJamt>@W-x"O_+ qD ,-Dok_`l~fbK.5x8l}Z+$yavH:FC+b p.Z/i7#)J}\)Em {B(BY05tlbZ2Wm ?$fatI+S7XL,CsGVoKoI> #Bw~TyjpQu#]v0%tmdO_f&.Jr2A4',ip DaE.>c>}Ol@T0x$VM;\) Wp% LV!u #UWCm I+\@i@N:B;2`D\AWg0uKqn a6n1tXBbgK) Z{aAiX-(EC)`r}D^HYp/XxO*a3vaZJe\.r.b5 yh#Sw@P+U"20koX1fU bVf$ifgp@gy;hQ_o#Z8;XzUcZ3Z3K>W@Rg4B>g^G4MdmJ/pT&c xSP|b@rH`BGPjTg4h)r %PDF-1.4 % ? Compressibility of Saturated Liquid Water, Question about carnot two phase power cycle. 0000011225 00000 n \X=!0)zriDnYvgJwDX3%x~mBJ~&ug?wsnk=~#Hcw;)C;83d-q`fVX,nOY99-b8'?1 Ik, ^Y:]Cd6=|rt=E?R^-a7|y[z8veO}Y?~AlVw3gZ>$lLHq]r^9*WO[. 0000016953 00000 n 0000004141 00000 n 0000001106 00000 n You need a complete superheat steam table (many stop at pressures well below 15 MPa). J'wqs3hXw_uMQp@> Y4_puGQqr70 g{eAg v}H( ,oO?6b$ +>LA3?gycGr\6MG6?VfQ6p-dtBmK?c=rU9 " :9Yj_F+/}^_@=zHOQq/ '|8H>RNH)~d?:?mcJ9~KGj. startxref @DavidWhite Sorry David, I didn't look at his entire post. Engineering Calculators Finding the enthalpy should be straightforward because I know that the isentropic efficiency of the turbine is 0.91. %PDF-1.4 This interactive self-study module uses screencasts and a simulation to explain how to use steam tables: These screencasts demonstrate how to use steam tables: Download Microsoft Excel (.xlsx) steam tables (we recommend using Excel format unless you have a specific reason to use .csv or .json files): Download comma-separated value (.csv) steam tables: Download JavaScript object notation (.json) steam tables: National Institute of Standards and Technology (NIST), International Association for the Properties of Water and Steam (IAPWS), Properties of Liquid Water in Steam Tables, Saturated water properties organized by temperature - CSV, Saturated water properties organized by pressure - CSV, Compressed liquid and superheated steam properties - CSV, Saturated water properties organized by temperature - JSON, Saturated water properties organized by pressure - JSON, Compressed liquid and superheated steam properties - JSON. 0000008763 00000 n <<331AA819609B9B4F992BFC7309D55DBE>]>> 0000009073 00000 n 0000008576 00000 n stream 0000007088 00000 n Is there some kind of rule I can use to do this? Please re-read. 0000013168 00000 n I probably should have posted higher on the page. 0000009240 00000 n We use cookies to improve your experience. These steam tables are available in three formats: an Excel spreadsheet (.xlsx) containing three tables, or individual tables in comma-separated value (.csv) format or JavaScript object notation (.json) format. 0000004264 00000 n Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. xb```f``i``2:@ (p0Xq5r+gT8gqC}-3qr_d`H. If he looks at the saturated steam table for 1.2 MPa he will see that the entropy for sat vapor is less that 6.50 and realize he should be looking at the superheat steam table. % 0000001889 00000 n 0000005064 00000 n 0000019052 00000 n The data in these steam tables is provided by the. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. To subscribe to this RSS feed, copy and paste this URL into your RSS reader.
%PDF-1.3 % xref <> | Contact, Home What happens if a debt is denominated in something that does not have a clear value? 0000001056 00000 n aovC)?LA%)kWt 3Cb4eOwn>-n>,Px6-i{m`M4 #%0xy>va;!LZVljV}]3k 0000000756 00000 n endstream endobj 87 0 obj <>stream I looked it up in tables. Feedback Advertising Thanks, please check your inbox or spam folder to confirm your subscription. We'll assume you're OK with this, but you can opt-out if you wish. startxref HWE6@pp#)zZNb{ET[ /?_r '8 26 25 0000006009 00000 n 0000002394 00000 n 0000001123 00000 n 0000004078 00000 n These cookies do not store any personal information. 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. Water droplets on the turbine blades lead to erosion, so turbines are designed to avoid saturated conditions. Okay: I have steam leaving a boiler at T = 873 K and P = 15 MPa and entering a turbine which it leaves at a pressure 2.1 MPa (these data are given), and I want to determine the other thermodynamic properties at this second point. -DP+2^mA@ h)X,vA[*h-bQv|vg8dLqlr*q@4[ v/ 0000001345 00000 n 0000010166 00000 n 0000004597 00000 n Is there a better way of defining a constraint on positive integer variables such that no two variables are the same and are uniquely assigned a value.
..there's no point in the steam tables where this entropy exists at that pressure-. 0000012977 00000 n Excel App. 0000008856 00000 n 0000000016 00000 n %xww$R/92v '@ Ma 4>^w8q\KE!CF5Xw._6@1(@lp/m)9W(19Fc6s8#/zOz&},y[v{6@JaGjR IyV14hSABq\`dpdNFj2T? 0000008670 00000 n You will also find that the steam exiting the turbine also appears to be superheat. xref Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. 0000004637 00000 n 0000009482 00000 n 2022, by Engineers Edge, LLC www.engineersedge.com When applying the lever rule, I can find results which are fairly close (like about 0.5% away from the printed result) from those the lecturer provided, but I am a bit skeptical because maybe it's some sort of coincidence? 0000005167 00000 n Why can we not use the specific heat to determine the work done on steam in a Rankine cycle? But opting out of some of these cookies may have an effect on your browsing experience. In a state with the common law definition of theft, can you force a store to take cash by "pretending" to steal? I see now he is referring to quality. 1R .\e||UTL+U|xy @ 6~"?=|>gw30jqa#Mu:nr&RiS"\8P0XdnVvm%2wMdq\Ir#_\1p5=IQ)*">/}y58EqDN-J_o:IMsL 0000016966 00000 n 0000003233 00000 n Revised manuscript sent to a new referee after editor hearing back from one referee: What's the possible reason? 0000003590 00000 n 0000002644 00000 n
Don't your steam tables also have tables for saturated water/steam, including liquid and vapor enthalpies, internal energies, and entropies? 0000010112 00000 n (",AB'(TAW^L{)8l3A4/{B*`5t%c|k)$m\SR. To learn more, see our tips on writing great answers. 0000020919 00000 n 1VS9PC_'UTeu12MPjJ"QB'? 0 dkts:hQj=3EN_%aCP}U1P` m[ It only takes a minute to sign up. These cookies will be stored in your browser only with your consent. 0000016476 00000 n 0000004097 00000 n We also use third-party cookies that help us analyze and understand how you use this website. 0 endstream endobj 41 0 obj<> endobj 42 0 obj<> endobj 43 0 obj<>stream Connect and share knowledge within a single location that is structured and easy to search. %PDF-1.6 % 34 23 You will find the entropy for 600 C, 15 MPa, is 6.680. 0000002275 00000 n 0000015019 00000 n 34 0 obj <> endobj c8Gyf#NXPbqnNDRq0=80O%Nop9W QnSid.EPKRe%s "$P 0G 2d8. p=3l;:5R.Ers2cd -sa~s;(r92, 0000007744 00000 n 0000007605 00000 n %%EOF This website uses cookies to improve your experience while you navigate through the website. AAOEKB+Symbol 'H HQWQ djDeltarhoCopyright (c) 1985, 1987, 1989, 1990, 1997 Adobe Systems Incorporated. 0000026145 00000 n %%EOF 0000003897 00000 n By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This category only includes cookies that ensures basic functionalities and security features of the website. Copyright 2000 - 5 0 obj 26 0 obj <> endobj 0000018273 00000 n 0 %PDF-1.6 %
xref 263 0 obj <>stream Convert all small words (2-3 characters) to upper case with awk or sed, My switch going to the bathroom light is registering 120 V when the switch is off. 0000005381 00000 n How can I get an AnyDice conditional to convert a sequence to a boolean? 28 0 obj<>stream Online Books & Manuals 0000011058 00000 n 0000002801 00000 n Starting at P2 = 2.1 MPa, I then found the "quality" (or "vapour fraction") by applying the lever rule.
We are sorry that this post was not useful for you! 0000007221 00000 n Saturated steam is steam that is in equilibrium with heated water at the same pressure, i.e., it has not been heated past the boiling point for that pressure.