GESON / WATER-COOLED SCREW CHILLER SYSTEMS
CONDENSER WATER · CENTRAL PLANT · SCREW COMPRESSOR DUTY
Water-cooled screw chillers built into the heat-rejection loop.
A water-cooled screw chiller is selected together with the chilled-water circuit, condenser-water loop and cooling-tower or heat-sink scope. The written proposal confirms capacity and power at the agreed operating conditions—not nominal tonnage alone.
SYSTEM DEFINITION / WATER SIDE
One machine.
Three connected loops.
The evaporator transfers heat from the chilled-water or process-fluid circuit to refrigerant. The screw compressor raises refrigerant pressure and temperature. The condenser then passes that heat into a separate condenser-water loop.
A cooling tower, dry cooler, heat-recovery circuit or another approved heat sink handles the final heat-rejection duty. Selection therefore includes the complete plant boundary—not only the chiller package.
WATER-LOOP DOSSIER
Define every interface before the screw chiller is selected.
The source page centers water-cooled screw chillers on the condenser-water system, cooling-tower conditions and central cooling applications. These four interfaces turn that source logic into a project-ready review.
Chilled-water duty
Required cooling load, entering and leaving fluid temperatures, design flow, pressure drop and glycol information define the evaporator-side duty.
Condenser-water loop
Entering and leaving water temperatures, flow, fouling allowance, water quality and pump arrangement define the condenser operating point.
Heat rejection
Cooling tower or alternative heat sink, outdoor wet-bulb, tower approach, range and water-treatment scope are reviewed as part of the plant.
Controls and BMS
Flow proof, pumps, tower fans, valves, chiller enable, alarm and staging sequence should be identified with the selected control package.
LOAD PROFILE / CAPACITY CONTROL
Read screw-compressor control across the operating profile.
The source identifies staged and multi-stage capacity adjustment. Actual unloading, speed control, minimum load and performance are confirmed for the selected compressor and package.
State the net load at approved chilled-fluid and condenser-water conditions.
Compare selected-model staging, unloading or speed control at the expected operating points.
Set sequencing, redundancy and tower/pump control around the project’s actual load pattern.
Capacity, power, water flow, pressure drop and control scope belong in the final submittal.
HEAT-REJECTION DECISION
Water-cooled and air-cooled screw routes solve different site constraints.
Water-cooled systems add condenser-water infrastructure and water treatment. In return, the project can define the heat-rejection system independently from the outdoor air-cooled condenser arrangement.
SELECTION FACTORWATER-COOLED SCREWAIR-COOLED SCREW
Heat rejection
Condenser-water loop + approved heat sink
Outdoor air across condenser coils
Site focus
Wet-bulb, tower, pumps, treatment and tubes
Dry-bulb, airflow, sound and coil access
Energy review
Chiller, chilled/condenser pumps and tower fans
Compressor, condenser fans and chilled-fluid pumps
PROJECT INPUTS / QUOTATION BASIS
Send the two water circuits together.
Stating the requested tonnage is not enough for a water-cooled screw selection. Provide the design conditions and plant scope so the equipment and interfaces can be matched.
Share Plant Conditions- 01
COOLING DUTY
Application, calculated load, minimum and typical load, operating hours, redundancy and future capacity plan.
- 02
FLUID CONDITIONS
Entering/leaving temperatures, design flow, water or glycol type, concentration and allowable pressure drop.
- 03
CONDENSER BASIS
Condenser-water temperatures and flow, outdoor wet-bulb, tower data, water quality and fouling allowance.
- 04
SITE + SCOPE
Plant-room access, lifting route, service clearance, electrical supply, BMS requirements, destination and factory/site supply boundary.
WATER-COOLED SCREW FAQ
Questions before the central plant is specified.
01What is a water-cooled screw chiller?+
It is a vapor-compression chiller using a rotary screw compressor. It cools a water or process-fluid circuit at the evaporator and rejects heat through a water-cooled condenser connected to an engineered heat-rejection system.
02Does every water-cooled screw chiller need a cooling tower?+
An evaporative cooling tower is common, but another approved heat sink may be used when it is engineered for the required condenser-water conditions and heat-rejection duty. The site system must be defined in the proposal.
03Is a screw chiller always more efficient than a scroll chiller?+
No. Compare selected-model capacity, full-load input, part-load performance and auxiliary power at the same chilled-water, condenser-water and load conditions. Compressor type alone does not establish operating cost.
04What is required to compare water-cooled chiller performance?+
Use the same entering and leaving chilled-fluid temperatures and flow, condenser-water temperatures and flow, fluid properties, fouling assumptions and load point. Include pumps and tower fans for a whole-plant comparison.
05What information should I send for a quotation?+
Send the application, design load, chilled-fluid temperatures and flow, glycol type and concentration where applicable, condenser-water conditions, wet-bulb data, operating profile, power supply, installation constraints and destination country.
MODEL-SPECIFIC PROPOSAL / GESON ENGINEERING
Start with the chilled-water duty and condenser-water design conditions.
Send the project load, fluid temperatures and flow, condenser-water data, wet-bulb, operating profile, electrical supply and plant boundary for a water-cooled screw chiller selection.