Biogas, syngas and landfill gas always contain water vapor in an unsaturated state. During combustion, the water vapor results in considerable corrosion damage to flares, engines and turbines. 

The biogas is cooled from +35 °C to +5 °C, causing the water vapor contained in the gas to condense. The condensate is separated and automatically drained from the system.

After cooling and condensate removal, the biogas is reheated electrically from +5 °C to approximately +15 °C, reducing the relative humidity to approximately 50–52% RH.

General Data

• Gas flow: 200 Nm³/h
• Gas inlet temperature: +35 °C
• Gas outlet temperature after cooling: +5 °C
• Relative humidity at inlet: 100%
• Relative humidity after cooling, before reheater: 100%
• Operating pressure: 0 bar(g)
• Maximum operating pressure: 0.5 bar(g)
• Pressure loss: approx. 8 mbar
• Required cooling power: 8.6 kW
• Condensate removal: approx. 7.2 kg/h

Cooling Machine

• Installed cooling power: 9.0 kW
• Design ambient temperature: +35 °C
• Maximum ambient temperature: +42 °C
• Minimum ambient temperature: −20 °C
• Cooling circuit temperature: +9 / +5 °C
• Refrigerant: R-410A
• Rated electrical power consumption including pump and fan: 3.0 kW
• Maximum current consumption: 7.8 A
• Maximum starting current: 44 A
• Power supply: 3~400 V + N + PE, 50 Hz
• Cold brine buffer storage: 50 l
• Sound pressure level at 10 m: approx. 38 dB(A)

Electric Gas Reheater

The electric gas reheater is installed downstream of the chiller to increase the gas temperature and reduce the relative humidity without using a hot-water circuit.

• Gas flow: 200 Nm³/h
• Inlet gas temperature: +5 °C
• Outlet gas temperature: approx. +15 °C
• Relative humidity at inlet: 100%
• Relative humidity at outlet: approx. 51%
• Required heating power: 0.8 kW
• Installed electric heating power: 1.0 kW
• Heater control: 0–100% modulating
• Temperature control: PID, outlet-temperature controlled
• Overtemperature protection: included
• Power supply: 1~230 V, 50 Hz
• Rated current: approx. 4.4 A
• Gas connections: DN100 / PN6

Installation & Connections

• Installation: Outdoor installation, non-Ex zone
• Maximum installation altitude: 500 m a.s.l.
• Ambient temperature range: −20 to +42 °C
• Biogas inlet connection: DN100 / PN6
• Biogas outlet connection: DN100 / PN6
• Condensate drain: R 1½"

Approximate Dimensions

• Length: 3000 mm
• Width: 1400 mm
• Height: 1500 mm
• Transport weight: 600 kg
• Operating weight: 750 kg

Scope of Supply

The biogas chiller system includes:

• Liquid chilling unit
• Gas cooler / heat exchanger
• Electric gas reheater
• Base frame
• Condensate removal system
• Thermal insulation
• Demister
• Water/glycol first filling
• Electric reheater temperature control
• Overtemperature protection