Mfaso a ɛwɔ microchannel ɔhyew sesa (Mches) so sɛ wɔde toto atetesɛm mu ɔhyew a wɔde sesa nneɛma ho (kɔbere tube aluminium fin ɔhyew sesa) .
Ɔhyew a ɛkɔ soro sen biara .
MCHEs feature ultra-nsuo a ɛsen fa mu no kwan nketewa (mpɛn pii no ne ntwemu yɛ mm 0.1–2) ne asase ani a ɛkorɔn-ɛde-volume ratio. Saa nhyehyeɛ yi ma nkitahodiɛ a ɛda ɔhyew a wɔde kɔ baabi foforɔ no ntam (te sɛ frigye te sɛ R134A anaa R404A) ne ɔhyeɛ a ɛsesa no ani, na ɛma ɔhyeɛ a wɔde kɔ baabi foforɔ no tumi kɔ soro 42% anaa nea ɛboro saa sɛ wɔde toto kɔbere afiri a wɔde di dwuma wɔ atetesɛm mu-fin nhwɛsoɔ ho a. Nsuo a ɛyɛ turbulence a ɛkɔ soro wɔ microchannels mu no ma ɔhyew a ɛko tia no so tew bio, na ɛma mches yɛ nea eye ma ahoɔden-kora nsɛm te sɛ aguadi freezers ne display cabinets.
Compact kɛse ne nea emu yɛ hare .
Wɔde nneɛma nyinaa-aluminum nneɛma ne fin a wɔaka abom-flat tube structure (ɛnam welding a ɛnyɛ den so) na ɛyɛe, MCHE ahorow no yɛ nea ɛyɛ ketewaa na ɛyɛ hare kɛse. Sɛ wɔkyekyɛ mu a, wɔte baabi a ɛsua 32–51% na wɔn mu duru sua 42–61% sen kɔbere a wɔde di dwuma wɔ atetesɛm mu-gyina ɔhyew sesa a ɛwɔ ɔhyew a wɔde kɔ baabi foforo no ara. Saa mfasoɔ yi ho hia ma ahunmu-aplikeshɔn a wɔahyɛ no den, te sɛ kar mframa a wɔde yɛ adwuma, afiri a wɔde yɛ frigye a ɛyɛ ketewa, anaa ofie HVAC nhyehyɛeɛ.
Nneɛma ne adwumayɛ ho ka a wɔbɔ no so tew .
Aluminium, MCHE no mu nneɛma titiriw no, yɛ nea ɛho ka yɛ kɛse-ɛbɔ ho ka sen kɔbere (afã titiriw a ɛwɔ atetesɛm mu nsakrae mu), ɛtew nneɛma a wɔde yɛ nneɛma ho ka so 20–30%. Bio nso, Mches hwehwɛ sɛ frigye ho ka sua koraa (ɛkɔ 50–70% a ɛba fam) esiane wɔn mu dodow a ɛyɛ ketewaa nti, ɛbrɛ bere tenten-bere a wɔde yɛ adwuma no ase na ɛne wiase nyinaa nneɛma a atwa yɛn ho ahyia ho mmara (sɛ nhwɛso no, F-gas mmara) a ɛmma frigye a wɔde di dwuma boro so no nni dwuma no hyia.
Ahotoso a ɛwɔ nhyehyɛe mu a wɔama anya nkɔso .
Advanced manufacturing processes (sɛ nhwɛso no, vacuum brazing ma nyinaa-aluminum components) ma nkitahodi a ɛnyɛ den ba fins ne flat tubes ntam wɔ MCHEs mu, yi gaps a ɛma ɔhyew resistance anaasɛ refrigerant leakage wɔ atetesɛm tube-fin exchangers. Saa nhyehyɛe a ɛnyɛ hwee yi nso ma ahoɔden a ɛko tia wosow ne ɔhyew a ɛkyinkyini no tu mpɔn, na ɛtrɛw ɔsom nkwa nna mu wɔ mmeae a ɛyɛ nnam (te sɛ lɔre a wɔde fa frigye mu a ɛkɔ baabiara).
Nneɛma a enye wɔ microchannel ɔhyew sesa (Mches) ho bere a wɔde toto atetesɛm mu ɔhyew a wɔde sesa nneɛma ho no .
Nneɛma a ɛko tia nsɛe a ɛba fam .
Aluminium nneɛma, ɛwom sɛ emu yɛ hare de, nanso ɛwɔ corrosion resistance a ɛba fam sen kɔbere-titiriw wɔ mmeae a ɛyɛ den (sɛ nhwɛso no, ɛpo mu tebea horow, mmeae a ɛkorɔn-nsu a ɛyɛ nwini, anaasɛ nneɛma a wɔde acid/alkaline nsu di dwuma). Sɛ wɔannya anti-corrosion coatings foforo (sɛ nhwɛso no, phenolic resin coatings) a, MCHE betumi anya aluminum oxidation anaasɛ pitting, na ebehia sɛ wɔtaa siesie anaasɛ wɔde foforo si ananmu wɔ tebea horow a ɛyɛ mmerɛw mu.
Nsiesiei a ɛkɔ soro a ɛyɛ den ne ɛka a wɔbɔ .
MCHE ahorow a wɔaka abom, a ɛyɛ ketewaa no ma ɛyɛ den sɛ wobesiesie. Nea ɛnte sɛ atetesɛm tube-fin exchangers (baabi a wobetumi de tube anaa fins a asɛe asi ananmu mmiako mmiako), sintɔ biako a ɛwɔ MCHE’ microchannels mu no taa hwehwɛ sɛ wɔde si unit no nyinaa ananmu. Eyi ma ɛka a wɔbɔ wɔ nsiesie ho ne bere a wɔde yɛ adwuma no yɛ kɛse, titiriw ma kɛse-scale industrial applications.
sika a wɔde hyɛ nneɛma a wɔyɛ no mfiase a ɛkorɔn mu .
Mches hwehwɛ sɛ wɔyɛ mfiridwuma a ɛyɛ pɛpɛɛpɛ (sɛ nhwɛso no, micro-extrusion ma flat tubes, high-temperature vacuum brazing) ne nnwinnade titiriw. Bere a nneɛma ho ka sua no, sika a wɔde di kan de hyɛ nneɛma a wɔyɛ mu no boro nea wɔde sesa ɔhyew a wɔde sesa nneɛma a wɔde di dwuma wɔ amanne kwan so no so mpɛn 2–3. Eyi ma mches no nyɛ sikasɛm mu de ma ketewa-batch production anaasɛ ɛba fam-Budget projects.
anohyeto a ɛkorɔn-Ɔhyew a wɔde di dwuma .
Aluminium a ɛyɛ hyew (bɛyɛ 660℃) ne ɔhyew a ɛyɛ den no sua sen kɔbere (melting point ~1085℃). Wɔ-temperature scenarios (sɛ nhwɛso no, industrial boilers, high-temperature waste heat recovery) mu no, Mches betumi anya structure integrity anaa thermal efficiency a ɛso atew, bere a atetesɛm kɔbere-gyinaso exchangers no kura adwumayɛ mu yiye wɔ tebea horow a ɛte saa mu.
Nneɛma a wɔpaw ho nkate .
Sɛ channel no kɛseɛ yɛ < 0.5 mm a, nsonsonoeɛ a ɛwɔ ɔhyew a ɛkɔ so no mu wɔ nneɛma te sɛ kɔbere ne dadeɛ a ɛnyɛ den ntam no bɛtumi adu 20%. Ɛsɛ sɛ wosusuw nhyehyɛe a wɔde yɛ nhyehyɛe titiriw no ho yiye de ka ahwehwɛde ahorow a ɛfa nsu a ɛreworo so a wɔko tia ho no ho.
flow channel shape gain .
Nsuo kwan nhyehyeɛ a ɛyɛ den (sɛ nhwɛsoɔ, serpentine/serrated) ma ɔhyeɛ a ɛkɔ soro no kɔ soro mpɛn 1.2 kɔsi 1.4 sɛ wɔde toto akwan a ɛyɛ tẽẽ ho a, nanso ɛhia sɛ ɛkari pɛ wɔ aguadiɛ-a ɛfiri nhyɛsoɔ a ɛkɔ soro 15%-25% mu.
Tags a ɛyɛ hyew .: MCHE Micro-channel evaporator, China MCHE Micro-akwan a wɔfa so yɛ evaporator, wɔn a wɔde nneɛma ma, adwumayɛbea
