Question

Stream Type T. (°C) T(°C) CP (kW/°C) 1 ATmin= 10 1 2 3 Hot Hot Cold Cold 180 130 60 30 80 40 100 1 20 4 1.8 1. Develop a temperature interval diagram 2. Produce a problem table from the temperature interval diagram 3. Using heat cascade, state the pinch point, Hot & cold utility usage 4. What is the minimum number of units a) For max energy recovery b) Energy relaxation across pinch 5. Design a HEX network for a) and b)

Answer 1

• The hot stream lines is based on the for te temperature - hear load doua me hot streams, and is evaluared wing *e Co\, team Кое е, чаму од 4, 5V19-лу The sme sua): «А чо Аме со\\ \\ ПР.. this means that there is no 'pinch I in cample because the temperature evence as the pinch point is grewer than the minimum value. The some Sex a6 САНng thе nеx9 Ахто е , че е "Ето Асе. difference at NN k ao milh ҮЮР Rolo TeN 9 СО \ooo (Co0 Seaь \оод |мт ]

1 Pinen point is the location in heat Rechanger where the temperature differ ме е, че от 5, Rota \\ 14 15 - се еlum's Үс за боку No №v ve en the ends as head exchanger is one or more $ 14, e, AEx »otos ®hose usage. Ақ% % , , , , , , , , Ф\ ts, . , ski, hex to via, Ni, АЖ) 595 cite см 5st be g gaCe so co\A 914 . \+4 954 cm | Csmost — се е си - ne s, 95 % е е,)- soussee sa 5w4 че ѕ. Yves Се 5 см »e (604e, ce the

1. The minimum numbers of exchangers Comin | m qehbox s Katy one 109 than the number or streams [N-. . However, by bring a hokel arrang menta - сет Pli HinG coin, some of the literature can be designed to conform to the Nad target. Тас е оrk we sum IoT \о хеч "0\е аtіng еlек \Jaco y1 \CuЛЧ ge Chapper, so Umin networks often have lower | ePita, Ro9. A coph Ameots, make mCHсе, что ми "Euler's general network theorm". this theorm | translowes into the teriminology of HENi stareg А) mino - N4 – о. За д а си? Where Umin a minimun no. of units N \ok ho. of hrew mg La number of loops 32 number of separate components.

6) Here (or] heat er Here the heat exchanger network neat exchanger is most effeient because heat trans fer is taking place au the minimum temperature difference. so this is your cold utility, this is .. our energy then it becomes cold utlility it becomes hot utility and this side 1- 19 +0 mеxаmе. ehsale oc ЧЕМ Synes ») volvo oo E\ty ») 4e4mm) Xing »» 0 - 60 kc eqota age heesee - «А \se of me me() { Од пех -

| 1 Теореске қос ү44, s um) е мое temperature interrous devined by the "interra \syaabrч <spex[.. . These can be defined in the follow ing way, the unadjusted temperatures of the Cold stream can be used, and the hot stream temperature Rato \ve \sqreA A SYM СНng Tom $com е чок), 10ЛЦе9 . . . За мое уу, me ssen Me "minimum temperature dirference "hap meo fuljke a Ne QЈСЦЕ ОЮ, Stream | tupe 1 is [c] 177 [8] to bec] ] TFC0C] | +st 180 | 8о 12+0 Хот \20 цO T130 Cold T60 joo Tso elkwl cJ cold | 30 | 100 | 2o. 4.8 Atmin = 10