Evaluation principles Chiller vs VRF system installation cost

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Evaluation principles Chiller vs VRF system installation cost
Don't just look at the "price of the machine" but have to look at the entire system + building characteristics + usage patterns.

1️⃣ Evaluation principles Chiller system installation cost
Chiller system = Central Plant system
The main cost is not just the machine.

🔹 Main cost elements
 1. Chiller machine
    • Air-Cooled / Water-Cooled
    • Fixed Speed / VFD
    • Accounted for as the highest % of the machinery budget.
 2. Water system
    • Cold water pipe (CHW)
    • Water pump (CHP)
    • Expansion Tank
    • Valve, Strainer, Balancing
 3. Cooling system
    • Cooling Tower (in case of Water-Cooled)
    • Condenser water pump (CDP).
    • Make-up Water / Water Treatment system
 4. Destination air conditioning system
    • AHU / FCU / PAU / OAU
    • Air pipe + insulation + Diffuser
 5. Electrical & Control
   • MDB, MCC, VFD
   • BMS / Chiller Plant Control
 6. Civil works
   • Engine room
   • Machine base
   • Shaft pipe / floating pipe

🔹 Method of valuation (concept)
   • Estimated from BTU or total TR.
   • Big building → price per TR will be cheaper.
   • Long-term use → Low average annual electricity cost.
In general, Chiller = high installation costs / low electricity costs / long service life

2️⃣ Evaluation principles VRF system installation cost
VRF = Zone separation system (Distributed System)
Expenses distributed by area

🔹 Main cost elements
 1. Outdoor Unit (Condensing Unit)
   • Number of machines by zone.
   • Every Inverter
 2. Indoor Unit
   • Cassette / Duct / Wall
   • Calculate price per point of use.
 3. Refrigerant pipe
   • Copper pipe
   • Y-Branch / Header
   • Soldering work (very important)
 4. Control
   • Remote
   • Central Controller (if any)
 5. Electrical
   • Sub MDB
   • Electrical wires go to many outdoor points.

🔹 How to evaluate the price
   • Estimated from BTU per area.
   • Large number of rooms → Price increases according to the number of indoor rooms.
   • No water work → Quick installation.

generally
VRF = easy installation / lower initial cost /Electricity costs are higher than Chillers in large buildings.

3️⃣ Cost comparison (overview)
   - Topic Chiller VRF
   - Default settings 
   - System work is complex and easy.
   - Long-term electricity costs are low, higher.
   - Service life 20–25 years 12–18 years
   - Maintenance costs, having a team to take care of them, are lower.
   - Suitable for large, medium-small buildings.

4️⃣ The concept of choosing to be “truly worthwhile” (design experience)
 • Building > 10,000–15,000 sq m. → Chiller is more worthwhile.
 • Buildings with multiple zones do not open and close at the same time → VRF is easy to install.
 • Hospital / factory / large department store → Chiller required.
 • Medium sized hotel / office → VRF answers the need.

5️⃣ Summary like an engineer (not selling dreams)
     Don't just look at the "installation price".
     Look at Life Cycle Cost = installation cost + electricity cost + repair cost 15–20 year.