Li-Microchannel Heat Exchangers (MCHEs): Fetola Li-Condensers tsa CRAC bakeng sa Tšebeliso e Ntle ea Setsi sa Boitsebiso

Bakeng sa litsi tsa boitsebiso, li-condenser tsa Computer Room Air Conditioner (CRAC) li entsoe-kapa-khefu bakeng sa ho boloka tšebetso ea li-server le ho theola PUE (Matla a Tšebeliso ea Matla). Tlhōrō ea setso-licheso tse futhumatsang li atisa ho haella{4}}li ngata, li sa sebetse hantle, 'me{5}li hlokomeloa hantle. KenaMicrochannel Heat Exchangers (MCHEs): e entsoe ka likanale tsa phallo ea microscale (0.1-2 mm), e kopantsoeng{2}}ka sebopeho sa aluminium kaofela, le vacuum brazing, li-MCHE li rarolla lintlha tsena tsa bohloko ha li ntse li fana ka boleng bo bonahalang bakeng sa ts'ebetso ea setsi sa data. Ka tlase ke hore na ba hlahella joang, hammoho le li-tweaks tse tloaelehileng tse eketsang tšusumetso ea bona.

Melemo ea Kopo ea Kopo: Rarolla Lintlha tse Kholo ka ho Fetisisa tsa Bohloko ba Setsi sa Boitsebiso

Li-MCHE ha li "ntlafatse" feela ho li-condenser tse tloaelehileng-li hlalosa se ka khonehang bakeng sa litsi tsa boitsebiso tse shebaneng le katleho, sebaka, litšenyehelo le botšepehi.

1. 30–50% Matla a Ho Fetisetsa Mocheso o Holimong=PUE e Tlase

Litsi tsa data li loanela ho boloka PUE ka tlase ho lilemo tse 1.3-'me li-MCHE ke sebetsa sa lekunutu. Likanale tsa tsona tse nyane li theha sebaka se seholo se ikhethileng (200–350 m²/m³, 2–3x sa mefuta ea li-tube{15}}fin), tse qobellang lihatsetsi (tse kang R134a kapa R410A) hore li be le moferefere o matla (nomoro ea Reynolds Re > 2300). Sena se fokotsa mocheso oa mocheso, 'me se sutumelletsa palo ea ho fetisa mocheso ho 400–600 W/(m²·K) (vs. 200–300 W/(m²·K) bakeng sa tube-fin).

Sena se bolela'ng ho uena: Bakeng sa moroalo o pholileng oa 100 kW, li-MCHE li fokotsa mocheso o fokolang ka likhato tse 3-5. Ho theoha ha tekanyo e 'ngoe le e' ngoe ea 1 ho fokotsa tšebeliso ea matla a compressor ka 2-3%, ho fetolela ho 25-35% ho fokotsa tšebeliso ea matla a CRAC. Bakeng sa sebaka sa data sa 1000 m² se mahareng, seo ke 30,000–42,000 kWh ho baballa motlakase ka selemo{15}}mme PUE e theohile ho tloha ho 1.4 ho ea tlase ho 1.25.

E nepahetse bakeng sa:{0}}litsi tsa data tse phahameng haholo (tekanyo ea matla > 300 W/m²) kapa tse nchafatsang likarolo tsa khale tsa CRAC (ha ho hlokahale ho atolosa sebaka ho matlafatsa ho pholisa).

{{0}–50% E Nnyane, 40–60% E bobebe: Boloka Sebaka sa Bohlokwa sa Setsi sa Boitsebiso

Sebaka sa mokatong oa boitsebiso se bitsa chelete e ngata-mme li-tube tsa setso{1}}li-fin condensers lia li senya. Li-MCHE's kaofela-aluminium flat-tube + integrated fin design e felisa likheo tse ngata tsa koporo le likheo tsa bloat tube{6}}fin models.

Bakeng sa 100 kW air{1}}seta se pholileng:

Bolumo: Li-MCHE li nka ~0.8 m³ (ha ho bapisoa le. 1.2–1.3 m³ bakeng sa tube-fin), li kenella habonolo mahlakoreng a rack kapa lihukung.

Boima ba 'mele: Ho ~80kg (ha ho bapisoa le. 150 kg bakeng sa tube-fin), li-MCHE li loketse liyuniti tsa CRAC tse marulelong{3}li fokotsa boima ba mohaho le ho fokotsa litšenyehelo tsa ho kenya (ha ho hlokahale lisebelisoa tse boima tsa ho phahamisa).

{{0}–70% e Tlatseha Sehatsetsing: Fokotsa Litšenyehelo le ho Kopana le Melao ea Tikoloho

Lihatsetsi tse kang R410A li theko e boima ebile li laoloa (ka lebaka la EU's F-Gas Regulation and China'sTekolo ea Boemo ba Botala le bo Tlase{{0}Tlhahiso ea Khabone bakeng sa Litsi tsa Boitsebiso). Bolumo e nyane ea kanale ea MCHEs (1/3–1/2 ea tube-fin) e fokotsa litlhoko tsa sehatsetsi:

Seseteme ea 100 kW e sebelisang R410A e hloka feela 2.5–3.5 kg ea sehatsetsi (ha ho bapisoa le. 8–10 kg bakeng sa tube-fin){7}}saving ~300–390 CNY yuniti ka 'ngoe ho ea pele.

Libaka tse fokolang tse lutlang (40% ka tlase ho li-tube-fin, ka lebaka la lihlooho tse kopantsoeng) li bolela kotsi e tlase ea tikoloho 'me ha ho na lihatsetsi tse turang- holimo.

4. Corrosion Resistance & 10,000-Hour MTBF: Boloka CRACs e matha 24/7

Litsi tsa data li sebetsa hang-hang-'me nako ea ho phomola e kotsi. Traditional tube tube-fin condenser e hloleha kapele ka lebaka la koporo-aluminium galvanic corrosion, empa li-MCHE li etselitsoe ho tšoarella:

Sebopeho se se nang moroko: Vacuum brazing e tlosa "koporo-likheo tsa aluminium" (sebaka se seholo sa kutu).

Liaparo tsa tloaelo: Liaparo tsa epoxy kapa polytetrafluoroethylene (botenya ba 20-50 μm) li matlafatsa khanyetso ea ho fafatsa letsoai ho tloha lihora tse 500 ho isa ho lihora tse fetang 1500.

Sephetho? MTBF (Mean Time Between Failures) e fihla lihora tse 10,000{2}}e batlang e imena habeli ea tube-fin (lihora tse 5,000–6,000). Tlhokomelo e nyane=e fokotsehile nakong ea setsi sa hau sa data.

Liphetoho tse Tloaelehileng tsa Tekheniki: Etsa hore li-MCHE li sebetse molemong oa CRAC ea hau

Li-MCHE ha se "ho oela-ka hare"-li hloka liphetoho ho tsamaisana le litlhoko tse ikhethang tsa CRAC. Mona ke kamoo re li ntlafatsang bakeng sa litsi tsa data:

1. Moralo o Bohlale bakeng sa Phetoho ea Meroalo le Lerata le Tlase

Manane{0}a mangata a fetisang: Li-server li eketseha haholo mots'ehare ebe li theoha bosiu. Li-MCHE li sebelisa liteishene tsa phallo ea karolo ea 2-4, tse kopantsoeng le li-valve tsa ho atolosa elektronike, ho lokisa phallo ea sehatsetsing: matla a feletseng bakeng sa litlhōrō, matla a leeme bakeng sa lulls. Sena se qoba "tlase-ho se sebetse hantle" ho aparetseng li-condenser tsa khale tsa -pass condenser.

Mapheo a khutsitseng: Litsi tsa data li hloka lerata Le ka tlase ho kapa le lekanang le 60 dB (A). Li-MCHE li sebelisa mapheoana a moqotetsane-(1.8–2.2 mm spacing) le -airflow e tlase (1.5–2.0 m/s){8}}e fokotsa lerata ka 3–5 dB (A) vs. tube-, kahoo lihlopha (tsa tšebetso le tlhokomelo) li sebetsa li sa khathatsehe.

2. (Tshireletso ea Corrosion & Clogging): E hahiloe bakeng sa Tikoloho ea Setsi sa Boitsebiso

Lerōle, mosi oa betri ea UPS, le sekala sa metsi ke likotsi tsa setsi sa boitsebiso{0}}Li-MCHE li sebetsana le tsona-ka:

Melao e 'meli-e thibelang kutu{1}}e thibelang kutu: Chromate passivation (5-10 μm) e matlafatsa ho khomarela, ha karolo e ka holimo ea epoxy (20-30 μm) e thibela mecha ea litaba e senyang. Liteko li bonts'a hore e hanela mafome ka lilemo tse fetang 8 litsing tsa data.

Metsi-litokiso tsa ho koala metsi (bakeng sa metsi-li-CRAC tse pholileng): Liteishene tsa MCHE (1–2 mm) li tloaetse ho hola{2}kahoo rea eketsa:

Li-filters tsa tšepe tse se nang tšepe tse 100-mesh ho tšoasa litšila.

Manane a nang le matlapa (1 mm inlet → 1.5 mm outlet) ho fokotsa phallo-ho phahama ha sekhahla ho bakang sekala.

Lijo-li-grade scale inhibitors (mohl, polycarboxylic acid) ho eketsa linako tsa ho hloekisa ho isa ho likhoeli tse 12 (ha ho bapisoa le. 6 likhoeli tsa tube-fin).

3. Khokahano ea CRAC e se nang Seam: Ha ho na litšila, ha ho na ho lutla

Li-MCHE li sebetsa hantle ha li tsamaisana le lisistimi tsa CRAC{{0}re ntlafatsa khokahanyo e 'ngoe le e 'ngoe:

Ho tsamaisana le fan: Mapheo a MCHE a na le 15–20% ea ho hanyetsa moea ka tlase ho feta tube-fin. Re sebelisa -static-li-pressure fan tse tlase (50–80 Pa) le cap speed ka Tlase ho kapa ho lekana le 1400 rpm ho boloka matla ntle le ho fokotsa ho pholisa.

Leak{0}likhokahano tsa bopaki: Lihlooho tse kopantsoeng li fokotsa palo ea sebopeho ho tloha ho 8–12 (tube-fin) ho ea ho 2–4. Habeli-ferrule seals boloka ho dutla Ka tlase ho kapa ho lekana le 1×10⁻⁹ Pa·m³/s (liteko tsa helium leak){8}}habohlokoa bakeng sa polokeho ea sehatsetsing.

Hobaneng ha li-MCHE e le Bokamoso ba Li-Condensers tsa CRAC

Bakeng sa litsi tsa datha, li-MCHE ha se sesebelisoa se futhumatsang hantle feela{0}ke tsela ea ho finyella lipakane tsa ts'ebetso, ho fokotsa litšenyehelo, le ho boloka li-server li sebetsa ka botšepehi. Hore na o aha-setsi sa batho ba bangata haholo kapa u ntlafatsa li-CRAC tsa khale, li-MCHE li fana ka tšebetso e sebetsang hantle, e baballang sebaka, le ho tšoarella ha nako eo u e hlokang hore u lule u le tlhōlisano.

Na u ikemiselitse ho fetola li-condensers tsa hau tsa CRAC? Lekola hore na li-MCHE li ka theola PUE ea hau joang le ho matlafatsa ts'ebetso ea setsi sa hau sa data kajeno.

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