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Cooling Tower System - How Heat is Rejected Efficiently

Gul Bahar Shah
  Cooling Tower System - How Heat is Rejected Efficiently This diagram explains the complete cooling tower cycle, a critical part of HVAC and industrial cooling systems. ✦ Working Principle: Hot water from the chiller/heat exchanger enters the cooling tower, where heat is removed through: ✓ Evaporation cooling (primary mechanism) ✓ Airflow induced by fan ✓ Heat transfer to ambient air The cooled water is then recirculated back to the system, ensuring continuous operation. ✦ Key Technical Highlights: • Cooling towers operate based on evaporative cooling principle • Typical temperature drop: 5°C to 15°C (approach dependent) • Efficiency depends on Wet Bulb Temperature (WBT) • Blowdown controls TDS & scaling via Cycles of Concentration (CoC) • Make-up water compensates for: • Evaporation loss • Drift loss • Blowdown loss ✦ Critical Components: • Cooling Tower (Heat rejection unit) • Pump (Circulation) • Heat Exchanger / Chiller • Conductivity Controller (Water quality c...
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Master the *Mathematical Formulas of Project Management* with these essential earned value metrics!

Gul Bahar Shah
  Master the *Mathematical Formulas of Project Management* with these essential earned value metrics! 📊 This infographic breaks down key formulas every project manager, engineer, or planner should know: Earned Value (EV), Planned Value (PV), Cost Variance (CV), Schedule Variance (SV), Cost Performance Index (CPI), Schedule Performance Index (SPI), Estimate at Completion (EAC), and To-Complete Performance Index (TCPI). Use these to track performance, forecast costs, and keep projects on schedule and within budget. 👉 Get all-in-one project management templates & dashboards in Excel at https://lnkd.in/dk8ZZQAt – perfect for optimizing your project metrics. #ProjectManagement #EarnedValueManagement #PMP #ProjectPlanning #Templates #Excel #ProjectSuccess 🚀📈
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The firefighter’s elevator operation—often called Fire Service Access Elevator (FSAE) / Firefighter’s Emergency Operation (FEO)—is defined mainly in National Fire Protection Association codes, especially:

Gul Bahar Shah
  The firefighter’s elevator operation—often called Fire Service Access Elevator (FSAE) / Firefighter’s Emergency Operation (FEO)—is defined mainly in National Fire Protection Association codes, especially: NFPA 72 (alarm interface & recall) NFPA 101 (building safety) Also coordinated with ASME A17.1 (detailed elevator operation) 🚒 Firefighter Elevator Response (NFPA Concept) There are two main phases of operation: 🔴 Phase I – Emergency Recall Operation (Automatic) Smoke detector in lobby, machine room, or hoistway Manual fire alarm activation Fire command center input What happens: Elevators stop normal service immediately Cars return to a designated recall floor (usually ground/lobby) Doors open and stay open Elevators become inoperable to public Important logic: If fire is detected on the main lobby → elevators go to alternate recall floor Prevents passengers from being delivered into danger 🔵 Phase II – Firefighter Emergency Operation (Manual Control) A...
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PRECAST ELEMENT HANDOVER – CHECKLIST & DOCUMENTS

Gul Bahar Shah
  PRECAST ELEMENT HANDOVER – CHECKLIST & DOCUMENTS PART A – HANDOVER CHECKS 1. Dimensional Check Overall dimensions as per approved drawing Tolerance within permissible limits Alignment, level & squareness verified 2. Visual & Surface Check No cracks, honeycombing, spalling Surface finish as per specification Chamfers, grooves, rebates as per drawing 3. Cast-in Items Check Inserts, bolts, plates in correct location Size, grade & orientation verified Welding quality checked (if applicable) 4. Concrete Quality Check Concrete grade as per specification Cube/Cylinder strength achieved Mix design compliance verified 5. Reinforcement Check Bar diameter, spacing & grade as per drawing Cover blocks provided properly No exposed reinforcement 6. Lifting & Transport Check Lifting anchors/loops in good condition Lifting points as per approved design Safe handling & transport arrangement 7. Identification & Marking Element ID, type & drawing number Ca...
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