✇🎛️🧑🎓 雜
𓃾 𓉭 𓂬 ⑂ 𓆓 𓈈 𓊽 𓋾 𓊀 𓁶 𓂋 𓂏 𓂀 ☸︎ 𓉤 𓃻 𓏷 ⚯ 𓃱¸ 𑀯 ⌂ገ ሠ r ⌸ дʷ ó ⌸₁ 𐌙ꕀ 𐌈 𓂕 𐌍 𐌆 〰 ϖ
⦠ 𓁹 🪡 Γ ʰ ꁻ 𓋿
1°F/°R = 5/9 °C/K
kw/RT = 3.516 / COP
Efficiency:
天基 > 堃霖 > 格力Gree
🇲🇾 At T4(CHWS) = 15°C, T2(CDWS) = 30°C
🇲🇾 At T4(CHWS) = 5°C, T2(CDWS) = 30°C
Fouling tendency:
York < Carrier < Trane
R123 < R134
Total Cooling Tower RT = ~1.2 x Total Chiller RT
開冷卻塔省下的电費會比多花的水費多
Magnetic Chiller Highest COP at Lower Loading
Refrigerant Chiller Highest COP at Higher Loading
+ve pressure vs - ve pressure
Magnetic Chiller usually < 500 RT as technology not yet mature @ 2023
60-70% of chillers are in Asia
Magnetic flow meter is more accurate than ultrasonic.
| Brand Type | Diff. Oil Prs. Normal Range |
|---|---|
| York Centrifugal | above 30Psid (207kPa) |
| Trane Centrifugal | between 18Psid (124kPa) to 22 Psid (151kPa) |
| Trane Screw | below 15 Psid (103kPa) |
| Carrier Centrifugal | between 16 Psid (110kPa) to 35 Psid (241kPa) |
| McQuay Centrifugal | above 60.9 Psid (420kPa) |
Eff: Centrifugal > Screw > Scroll > Reciprocal
Isentropic
T2 ⬇️1°C ➡️ ~1% ⬇️ Compressor Power
Surge: P diff btwn refrigerant in Evap & Cond. > Design Max Chiller Lift, Backflow frm Cond. ➡️ Evap can happen
SUPERHEAT rfrgrnt abv boiling pt to ensure it enters cmprssr as 100% gas
Some Chillers are Compartmentalised (refrigerant loops & comprssrs separated)
Some Chillers use part of Cooling Water to cool Compressor
Compressor Voltage
Thailand 380V
Malaysia 415V / 6600V
Can Biofilm form on Silver surface?
𓃾r⌂𓂧𓋿ꕀ⊗ 𓃾Д𓂋r𓂋r⊗ꕀ𓂋 ⌸₁o𐌙⊗o 𓊀ገʰrdʰ 𓃾llz𓂧m𓉤gts😅
ϖ𓋿⦠u 𓉤⊗ enwrssliko ϖr𓂋r⊗n𓋾s
𓃾Д.𓂋r𓂋r-⊗ꕀ𓂋
SUBCOOL rfrgrnt blw boiling pt to ensure it enters Exp Valve as 100% liquid
Adiabatic
Humidity control is vital to Hospitals
Chiller: Every 1 ºC⬇️ ↪ ~3% energy saving
𓃱𑀯𓋿⊗𑀯 ⑂Дr ϖ𓋿⦠u 𓉤⊗ enwrssliko ϖrϖr⊗n𓋾s 𓃱ʰs𓋿𑀯h₂.⑂lh₁dʰ.kóryos /⊗𐌍
Oil Sump Heater OFF when Chiller ON
Oil Sump Heater ON when Chiller OFF
Air Compressor Designated Cool Temperature Difference (CTD) ~ 7-8 ºC
Air Compressor: Every 3 ºC⬇️ ↪ ~1% energy saving
#🛢️Frigaid
Ion–dipole bonding is stronger than hydrogen bonding.
https://www.quora.com/Can-you-add-Frigaid-to-gear-oil
https://www.quora.com/Can-you-add-Frigaid-to-engine-motor-oil
](https://blog.nutbox.io/@bsfmalaysia/ewqbb-modified-reverse-rankine-cycle-refrigeration-sook-jin-goh), 2023-Jul-18
back on Top 5 Google Image Search Results for "Reverse Rankine Cycle" @ 2024-05-14
back on Top 10 Google Image Search Results for "Reverse Rankine Cycle" @ 2024-05-06
Preventive Saving & Measured (Restorative) Saving of Chillers
, 2023-Feb-10 / STM
/ twt
𓂬rsoscare 𓏷𐌍 ϖrꕀ 𓂬𐌍д𐌍ꁻr✔
⌛ ~ 1-2 yrs
Svng ~ 3 - 15%
💰💰💰💰💰💰
SGdoc3QgYW5ubCBwcmZ0ICBSTSByIHpyLCBtIHN0ZmY
只需一台電腦，有网絡，到處都能操業
Ozone is not suitable for water sterilization in pharmaceutical production.
打螺絲機器 潤滑油需要有硫磺
中國的書（紙）密度普遍比歐美來得大，很沉重
