01
Chip & cold plate
Direct-to-chip cold plates take heat off GPU and CPU dies at up to 1,600 W per socket. Junction to coolant in a single conduction step.
≈ 45 °C out68%less water than an open cooling tower, at equal capacity in Singapore
8,760hper year holding 32 °C facility water — no chiller, no throttling
3,600hper year running fully dry, drawing zero make-up water
5MWper factory-built module — capacity and CAPEX arrive in one-cell steps
The whole chain
From silicon junction to Southeast Asian sky
We engineer, supply and commission the complete heat-rejection path — not just the box on the roof. Every degree of approach between the chip and the ambient wet-bulb is ours to defend. At the ambient end the plant is a bank of identical 5 MW modules on common headers, so a 40 MW campus is eight of the same thing rather than one bespoke structure.
02
Rack manifold & TCS loop
Treated, filtered secondary coolant collects through vertical rack manifolds. Quick-disconnects, leak detection, N+1 flow.
45 / 37 °C03
CDU
A liquid-to-liquid plate exchanger with N+1 variable-speed pumps splits the clean technology loop from the facility loop and holds secondary setpoint independently of the outside world.
≈ 3 K approach04
Facility water loop
A closed, clean primary circuit. Because the SEA-5 module coil is closed-circuit, no intermediate plate exchanger is needed here — and that saves 1.2 K of approach outright.
40 / 32 °C05
SEA-5 module — dry section
Inside each 5 MW cell, finned V-bank coils take the first, sensible bite out of the return water. Whenever ambient allows they take all of it, and the wet section stays off.
zero water06
SEA-5 module — wet section
Below the dry coil, a closed-circuit coil sits in a modulating spray. Duty ramps 0–100 % against wet-bulb and load, so water is spent only where it buys temperature.
→ ambientThe unit of capacity
SEA-5 hybrid module
One cell, 5 MW of rejection, built and wet-tested in the factory and shipped complete. A 40 MW campus is eight of these on a common header rack — not one bespoke structure.
5MW per cell
- Overall size
- 16.0 × 6.0 × 5.4 m
- Operating weight
- ≈ 34 t filled
- Fans
- 3 × EC axial, 5 – 100 % speed
- Dry section
- V-bank finned coil, zero water
- Wet section
- Closed-circuit coil in modulating spray
- Water connections
- DN250 flanged, one face, both valved
- Design supply
- 32 °C at 27.5 °C wet-bulb
- Set and connect
- ≈ 2 days per cell
The control idea in one sentence. A dry cooler is cheap on water and expensive on temperature; an open tower is the reverse. The SEA-5 module is one machine that occupies every point in between, and a controller that moves it there hour by hour — so the plant is never paying for capability it does not need at that moment, and never short of it when the wet-bulb spikes.
Size it · in 5 MW modules
Four ways to reject a megawatt in the tropics
Every figure below comes from an hourly simulation of the site you pick — 8,760 hours of synthesised dry-bulb, dew point and wet-bulb, run against a physical model of each machine. Capacity is built up in 5 MW modules; move the sliders and the whole table re-solves.
Design inputs
Cooling capacity4 × 5 MW = 20 MW
One SEA-5 module = 5 MW · heat rejected to ambient
SiteSingapore
—
Annual load factor80 %
Mean IT utilisation across the year
Electricity tariff0.100
USD / kWh
Industrial water tariff1.20
USD / m³ incl. discharge
Evaluation horizon10 yr
Undiscounted total cost of ownership
Basis. Figures are indicative and subject to site-specific engineering. Scope per system: tower or cooler, circulating pumps, in-plant pipework, water-treatment plant, controls and civil works — CDUs and in-hall distribution are common to all four and excluded. Setpoint 32 °C facility water supply (ASHRAE W32, chiller-less). Recirculating systems at 4.5 cycles of concentration; evaporation taken at 1.475 L per kWh rejected. The open tower carries an intermediate plate heat exchanger, because open-basin water cannot be sent to a CDU — that is worth 1.2 K of approach and a water-treatment plant. Adiabatic pads are once-through with no cycles of concentration, and the small tropical wet-bulb depression buys little cooling per litre passed over the media, which is why their annual water draw lands close to a modulating hybrid despite running dry more often.
A day at the selected site
Ambient conditions and the water temperature each machine can actually deliver, hour by hour.
What the SEA-5 module does about it
Wet-section duty and fan demand over the same day, as a share of rated.
Why Southeast Asia is different
A small wet-bulb depression changes every answer
Temperate-climate playbooks do not survive the crossing. In Singapore the dry-bulb sits high, the dew point barely moves all year, and the gap between dry-bulb and wet-bulb — the entire budget an evaporative process has to work with — is often only 5 to 7 K. That single fact is what makes dry cooling expensive, adiabatic pre-cooling disappointing, and modulation valuable.
Where the year's hours actually sit
Annual hours by wet-bulb bin, split by what the SEA-5 module is doing in them.
Hybrid running fully dry — zero water
Wet section modulating
Design conditions · Singapore
What this buys. —
Our edge
Seven things only a modulating hybrid module gives you
Water becomes a dial, not a fixed cost
The wet section modulates continuously from full duty to fully off. Water is spent only in the hours and at the intensity that actually buy you temperature — typically cutting annual draw by around two thirds against an open tower on the same duty.
Setpoint held on the worst afternoon of the year
At the design wet-bulb the wet section goes to full duty and delivers the same approach an open tower would — without the intermediate plate exchanger, and therefore 1.2 K colder at the CDU. Dry and adiabatic machines simply run out of temperature and hand the problem to your chip.
Instant reserve for load steps
For most of the year the wet section is running below full duty. That idle capacity is standing reserve: when a training job steps the hall from 40 % to 100 %, spray pumps ramp and the extra kilowatts land in under thirty seconds — no pad wetting lag, no basin transient, no thermal throttling.
A water outage is not an outage
Lose municipal supply and an open tower has only its basin — hours, at best. A SEA-5 bank falls back to dry operation and keeps running indefinitely at around 70 % of rated capacity. In a region where water permits and dry-season restrictions are real, that is a different risk class.
Closed circuit, no plume, low biological risk
Process water runs inside a closed coil and never meets open air, so there is no aerosolised process water and a far smaller legionella regime to manage. Warm dry air off the top coil mixes with the saturated plume and suppresses it — which is often what makes an in-city or industrial-estate permit possible at all.
Capacity in 5 MW steps, not one bespoke structure
Every cell is the same SEA-5 module: factory-built, tested before it ships, set and connected to common headers in about two days. A 40 MW campus is eight identical things, so spares are one part list, the O&M procedure is one document, and the second hall does not need a second design.
It changes the money too. CAPEX arrives when the hall energises rather than on day one, redundancy costs 5 MW instead of a duplicated plant, and any single cell can be valved out and serviced while the rest of the bank carries the load.
Sized and proven against your own weather
We do not sell a nameplate. Every proposal is an 8,760-hour simulation against your site's dry-bulb and dew point, your load profile and your tariffs, with the dry/wet split chosen to put the crossover exactly where your economics want it. The model behind this page is the same one we hand you.
Talk to an engineer
Send us your load and your postcode.
We will come back with an hourly simulation for your actual site: water, power, delivered temperature and total cost across all four technologies — not just ours.
- Feasibility and concept design, one 5 MW module to campus scale
- Supply, installation, commissioning and IST witnessing
- Control-logic tuning against your measured wet-bulb and load
- Retrofit of existing open-tower plant to a SEA-5 module bank
- O&M, water-treatment regime and WUE reporting