MEP Systems in a High-Rise Building ✅️ basically all the main technical systems inside a tall building. MEP = Mechanical + Electrical + Plumbing (plus Fire & Safety). 🔵 1. Mechanical System (HVAC / Cooling) 👉 Used for air conditioning & ventilation Cooling Towers (roof) → remove heat from building Chillers → make chilled water FCU / AHU / Air Handling Units → supply cool air Fan Coil Units → room cooling Ducting & air distribution 👉 Purpose: Cooling, ventilation, indoor comfort 🟡 2. Electrical System 👉 Power supply & distribution Transformers → voltage change UPS Room → backup for critical loads Switchboards / Panels Cable risers Lighting & sockets Generator → power backup 👉 Purpose: Provide electricity safely 🔴 3. Fire Fighting System 👉 Safety during fire Sprinklers Fire pumps Fire water tanks Hose reels & hydrants Fire alarm system 👉 Purpose: Detect + control fire 🔵 4. Plumbing System 👉 Water supply & drainage Overhead water tank Booster p...
Gul Bahar Shah
Gul Bahar Shah
OPEN vs CLOSED LOOP COOLING TOWERS
Practical MEP Comparison Every Engineer Must Know
Cooling towers look similar from outside —
but their circuit philosophy, water quality, pump selection, and maintenance strategy are completely different.
Here’s the real site-based comparison 👇
🟦 OPEN LOOP COOLING TOWER
💧 Water is directly exposed to air
How it works:
Hot condenser water → sprayed over fill → direct evaporation → cooled → back to chiller.
✅ Practical Advantages
• Very high heat rejection efficiency
• Simple operation
• Lower initial cost
• Widely used in large HVAC plants
❌ Practical Limitations
• Scaling, algae & bacteria formation (need chemical dosing)
• Water loss due to evaporation & drift
• Requires make-up water connection, blowdown
• Contamination directly affects chiller tubes
🛠️ Site Use Case:
District cooling, high-rise towers, malls, stadiums.
🟩 CLOSED LOOP COOLING TOWER
🔁 Heat transfer without exposing process water to atmosphere
How it works:
Chilled water/glycol flows inside coil → external water sprays on coil → evaporation cools the coil.
✅ Practical Advantages
• Process water always clean → protects HX, chillers, data centers
• Lower maintenance
• Reduced scaling & fouling
• Best for industrial cooling, data centers, cold storage
❌ Practical Limitations
• Higher initial cost
• Slightly lower heat rejection efficiency
• Requires two sets of pumps (coil circulation + spray circulation)
🛠️ Site Use Case:
Data centers, industrial plants, sensitive cooling loops.
🎯 Quick Practical Difference (Real MEP Summary)
• Open Loop → Exposed water, high efficiency, more maintenance
• Closed Loop → Clean loop, less contamination, higher CAPEX
• Open = condenser water, Closed = process/glycol loop
• Closed loop always has two pumping circuits
Aww
🔍 Why It Matters for Engineers?
This selection impacts:
✔ Chemical treatment cost
✔ Water consumption
✔ Heat exchanger performance
✔ Long-term reliability of chillers / process equipment
hashtag#MEP hashtag#HVAC hashtag#CoolingTower hashtag#OpenLoop hashtag#ClosedLoop hashtag#MechanicalEngineering hashtag#MEPDesign hashtag#HVACDesign hashtag#ChillerPlant hashtag#DistrictCooling hashtag#DataCenterCooling hashtag#IndustrialCooling hashtag#QatarProjects hashtag#SaudiProjects hashtag#UAEProjects hashtag#GCCEngineering hashtag#MiddleEastEngineering
but their circuit philosophy, water quality, pump selection, and maintenance strategy are completely different.
Here’s the real site-based comparison 👇
🟦 OPEN LOOP COOLING TOWER
💧 Water is directly exposed to air
How it works:
Hot condenser water → sprayed over fill → direct evaporation → cooled → back to chiller.
✅ Practical Advantages
• Very high heat rejection efficiency
• Simple operation
• Lower initial cost
• Widely used in large HVAC plants
❌ Practical Limitations
• Scaling, algae & bacteria formation (need chemical dosing)
• Water loss due to evaporation & drift
• Requires make-up water connection, blowdown
• Contamination directly affects chiller tubes
🛠️ Site Use Case:
District cooling, high-rise towers, malls, stadiums.
🟩 CLOSED LOOP COOLING TOWER
🔁 Heat transfer without exposing process water to atmosphere
How it works:
Chilled water/glycol flows inside coil → external water sprays on coil → evaporation cools the coil.
✅ Practical Advantages
• Process water always clean → protects HX, chillers, data centers
• Lower maintenance
• Reduced scaling & fouling
• Best for industrial cooling, data centers, cold storage
❌ Practical Limitations
• Higher initial cost
• Slightly lower heat rejection efficiency
• Requires two sets of pumps (coil circulation + spray circulation)
🛠️ Site Use Case:
Data centers, industrial plants, sensitive cooling loops.
🎯 Quick Practical Difference (Real MEP Summary)
• Open Loop → Exposed water, high efficiency, more maintenance
• Closed Loop → Clean loop, less contamination, higher CAPEX
• Open = condenser water, Closed = process/glycol loop
• Closed loop always has two pumping circuits
Aww
🔍 Why It Matters for Engineers?
This selection impacts:
✔ Chemical treatment cost
✔ Water consumption
✔ Heat exchanger performance
✔ Long-term reliability of chillers / process equipment
hashtag#MEP hashtag#HVAC hashtag#CoolingTower hashtag#OpenLoop hashtag#ClosedLoop hashtag#MechanicalEngineering hashtag#MEPDesign hashtag#HVACDesign hashtag#ChillerPlant hashtag#DistrictCooling hashtag#DataCenterCooling hashtag#IndustrialCooling hashtag#QatarProjects hashtag#SaudiProjects hashtag#UAEProjects hashtag#GCCEngineering hashtag#MiddleEastEngineering
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