Chiller Performance

Clipper Stad Amsterdam · R449A chilled-water plant
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LP suction bar g
HP discharge bar g
Cond. approach °C
Subcooling °C
CHW ΔT °C
CHW supply °C
Freeze margin bar

Condensing approach

Condenser condition. Flat & low is good — 16 °C means clean.

LP suction

Suction & freeze margin — keep above 4.5 bar g.

HP discharge

High side. Rises with sea temperature; fine while approach stays low.

CHW supply

Delivered temperature against the 10 °C setpoint.

Sea-water inlet

The main driver of high-side pressure.

Approach vs sea-water inlet — the fouling test

Each dot is one reading: sea-water inlet (x) against approach (y). A clean condenser holds a flat low band whatever the inlet temperature.

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This test removes sea temperature from the picture. If approach stays low as inlet temperature climbs left to right, the condenser is clean. A band that sits higher across all inlet temperatures is fouling — regardless of how warm the sea is.

HP vs sea-water inlet — independent check

Sea-water inlet (x) against HP (y). Healthy, this is a tight rising line — HP simply following sea temperature.

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If this line lifts over weeks at the same inlet temperature, that's fouling confirming itself independently of the approach calculation — a useful cross-check that doesn't rely on the P-T table.

R449A high-side P-T reference — bar g → sat. cond. °C

bar g°Cbar g°Cbar g°C

Corrected Honeywell basis (45 °C ≈ 19 bar g). Mean saturated condensing temperature; R449A glide ~5 K gives ±~2.5 °C. High side only — this is what the approach calculation uses.

Condensing approach calculator

Saturated condensing temp:
Enter HP and SW outlet.

Approach = saturated condensing temp (from HP) − sea-water outlet. Same method as the live sheet, so the number matches the log to the decimal.