Heat galai shai ai unit ni gara hku bungli galaw ai kun?

Hka garan tawn ai (madung masa)Industrial hte maigan hpaga yumga galaw ai nbung galai shai ai jak law malawng gaw, nbung lahkawng hpe kayau kaya n byin hkra, nbung hpe n-gun ja ai bunghku (metal pipe bunghku, corrugated metal plates zawn re ai) hku nna, nbung hpe garan ginhka nna, bunghku hku nna nbung hpe direct mix galaw na matu sha ahkang jaw ai; heat exchange hpe lang ai raitim, hka hpe kayau kaya galaw lu na matu ra kadawn ai lam ni hpe galaw ra ai.

Hkrun lam hkawm ai n-gun: Katsi ai shai hkat ai lam (ΔT)Katsi ai hpe htawt sit ai lam a core driving force gaw katsi ai hte katsi ai hka lapran na katsi ai shai hkat ai lam rai nga ai. Dai nbung laru shai hkat ai lam kaba wa yang, nbung laru htawt sit ai lam grau lawan wa na re.Dai hka lahkawng a lapran nbung laru shai hkat ai aten du hkra, nbung laru shai hkat ai lam gaw zero de du wa nna, n-gun rawng ai rap ra lam de du wa ai aten du hkra, nbung laru htawt sit ai lam gaw shi hkrai shi byin pru wa na re, dai aten hta kaja ai nbung laru htawt sit ai lam gaw madung hku nna jahkring kau ai.

Madung Ladat:Three-Step Heat Transfer Grau nna lang ai indirect heat exchanger hpe ga shadawn hku la yang, n-gun galai ai lam gaw, matut manoi galaw ai lahkam masum rai nna, dai ni hta na langai mi hpe mung n mai tawn kau ai:

- Convection heat transfer (fluid → bunghku): N-gun ja ai -n-gun rawng ai ntsin gaw bunghku langai a maga mi de lwi wa ai shaloi, n-gun molecule ni gaw bunghku hte hkrat nna bunghku de n-gun hpe htawt sit ya ai. Dai aten hta sha, hka htung a shi a macroscopic flow (turbulence) gaw, kata na katsi ai hpe bunghku de matut manoi htawt sit ya nga ai. Lawan ai hku lwi ai hte n-gun ja ai turbulence gaw, nbung hpe htawt sit lu ai atsam grau law wa ai.

- Katsi ai hpe htawt sit ai lam (bunghku kata): Katsi ai hpe n-gun ja ai-katsi ai maga bunghku kaw nna, n-gun kaji ai-katsi ai maga bunghku de, n-gun ja ai bunghku arung arai a molecular vibration hku nna htawt sit ai. Bunghku a n-gun atsam (stainless steel hta grau kaja ai n-gun rawng ai copper hte aluminum zawn re ai) hte bunghku a galu kaba ai lam hte n-gun rawng ai lam gaw n-gun rawng ai lam hpe hkrak sha hkra machyi shangun ai.

- Convection heat transfer (bunghku → hka): N-gun n law ai-katsi ai maga na bunghku gaw bunghku makau na n-gun n law ai-n-gun rawng ai ntsin molecule ni de katsi ai hpe htawt sit ya ai. Dai low-temperature fluid gaw shi a lwi ai lam hku nna katsi ai hpe htawt sit kau ya nna, bunghku hte hka lapran na katsi ai shai hkat ai lam hpe makawp maga ya ai hte matut manoi katsi ai hpe htawt sit ya lu ai.

N-gun rap ra ai lam:Katsi ai hpe makawp maga ai lam Ideal masa hta (katsi ai hpe loi mi sha sum mat ai hpe n sawn ai sha), n-gun kaba ai-n-gun rawng ai hka kaw na pru wa ai n-gun yawng gaw, n-gun n-gun hpe makawp maga ai tara hte maren rai nga ai. shayawm ai shaloi, npu-n-gun n-gun n-rawng ai ntsin a n-gun gaw loi loi hte jat wa nna, dai lahkawng a lapran na n-gun shai hkat ai lam gaw loi loi hte shayawm mat wa ai majaw, n-gun htawt sit ai lam hpe shayawm kau ya ai.