Heat exchange unit te hian engtin nge hna an thawh?

Fluid isolation (mainstream mode) a awm thei lo.Industrial leh foreign trade heat exchange device tam zawk chuan fluid lum leh vawt chu thermal conductivity sang tak solid wall (metal pipe wall, corrugated metal plate ang chi) hmangin khauh takin an thliar hrang a, chu chu fluid pahnih inhmeh leh tihbawlhhlawh loh nan a ni a, wall kaltlangin heat transfer chauh a phalsak a;In a few special scenarios (such as cooling towers) in, direct fluid contact mixing heat exchange is used, but the process requirements for fluid mixability chu a tlin a ngai a ni.

Driving force: Temperature danglamna (ΔT) 1.1.Heat transfer-a core driving force chu tui lum leh lum inkar temperature danglamna a ni. Temperature danglamna a tam poh leh heat transfer rate a rang zawk a ni.Fluid pahnih inkara temperature danglamna a awm chhung chuan heat transfer chu a takin a thleng ang a, chu chu fluid pahnih inkar temperature danglamna chu zero a hnaih a, dynamic equilibrium a thlen thlengin a awm ang a, chutah chuan effective heat transfer chu a bul berah chuan a tawp ta a ni.

Core Process tih dan tur: 1.1.Three-Step Heat Transfer Indirect heat exchanger hman lar ber entirnan la ila, heat transfer hi step pathum a zawnin a awm a, chung zinga pakhat mah chu paih theih a ni lo:

- Convection heat transfer (fluid → wall): Bang sir khatah -temperature sang tak fluid a luang chuan fluid molecule te chu wall nen an insu a, wall ah heat an transfer thin. Chutih rual chuan fluid ngeiin macroscopic flow (turbulence) a neih chuan a chhunga lumna chu wall-ah a transfer chhunzawm zel a ni. Flow rate a chak poh leh turbulence a chak poh leh heat transfer efficiency a sang zawk thin.

- Heat conduction (wall chhungah): Heat hi solid wall material molecular vibration hmangin high{1}}temperature side wall atanga low-temperature side wall thlengin a kal a ni. Wall material-a thermal conductivity (copper leh aluminium ang chi, stainless steel aiin thermal conductivity tha zawk nei) leh wall thickness leh℃of fouling hian conduction efficiency a nghawng nghal vek a ni.

- Convection heat transfer (wall → fluid): Temperature hniam lam-temperature side wall hian wall bula low-temperature fluid molecule te hnenah heat a transfer thin. Low-temperature fluid hian a flow hmangin heat chu a phur chhuak a, wall leh fluid inkar temperature danglamna chu a vawng reng a, heat transfer chhunzawm zel a tichiang bawk.

Energy Balance: 1.1.Conservation of Heat Condition tha takah (heat loss tlemte ngaihthah) chuan high-temperature fluid-in heat a chhuah zawng zawng chu low-temperature fluid-in heat a lakluh zawng zawng nen a inang a, hei hi energy humhalh dan dan nen a inmil a ni.Heat transfer a nih chuan high{3}}temperature fluid temperature chu a tlahniam zauh zauh a, temperature of low-temperature fluid chu a pung zauh zauh a, an pahnih inkar temperature danglamna chu a tlahniam zauh zauh a, chu chuan heat transfer rate a tihhniam phah a ni.