E-rational 1000 series

BEP Europe through its Energy & Infrastructure Division – “E-Rational” 
is delivering a cost-effective solution to convert low temperature heat into clean energy power without emissions. Our state-of-the-art Organic Rankine Cycle (ORC) technology combined with the usage of industrial grade components makes E-Rational’s ORCs user-friendly, robust and economically viable.

E-Rational’s ORC machine has been designed for a maximized combined uptime and efficiency with a minimized operational and maintenance cost. This resulted in a skid-mounted modular machine, CE-compliant, with plug-and-play connections for easy installation.

The ORC-1000 machine absorbs up to 1,000 kW (3.4 MMBTU/h) thermal heat in a temperature range between 80°C and 150°C (176 F – 302 F). The ORC units are heat powered by hot water, thermal oil or low pressure steam coming from:

  • Waste heat flows from industrial processes, e.g. cooling cycles from chemical plants,  glass-,  steel-  & food- industry,  power plants,  etc …
  • Unused heat in District Heating networks
  • Biomass furnaces and CHP/COGEN or biogas installations
  • Geothermal wells

Depending on the operating conditions, E-Rational’s ORC-1000 series are offered with different types of expander-generator sets with typical outputs ranging from 55 kWe to 132 kWe.

E-rational 1000 series


Skid mounted modular Organic Rankine Cycle machine

Generator type

Asynchronous, 2 pole, 3 phase, 400V, 50-60 Hz

Generator Power Range

55kWe - 70kWe - 90kWe - 110kWe - 132kWe


E-Rational (single screw, radial inflow)

Heat Exchangers

Plate heat exchangers

Applied EG-Norms:

Machine directive

EMC Directive

Low voltage directive

Pressure Equipment Directive



2004/108 EG



Electrical Enclosures


Control system

PLC, Web Based Remote Monitoring

Dimensions (L x W x H)

2,933 mm x 1,856 mm x 2,530 mm (9’6” x 6’1” x 7’5” )

Operating Mass (kg)

±3,800 kg (±8,378 Lbs)

Operating Conditions (ambient temperature)

-20°C to +50°C (-4 F to 122 F)

Temperature Heat input

80°C – 150°C (176 F – 302 F)

Maximum heat input

1,000 kWth (3.4 MMBTU/h)

Heat source

Hot water

Thermal oil

Low Pressure steam

ORC working Fluid

(depending on conditions)

Honeywell r245fa®

Solkatherm SES36®

Hydraulic connection heat source

2 Flanges DN150 PN16

Hydraulic connection cooling

2 Flanges DN150 PN16

Cooling system

Cold water

Cooling tower

Air cooler


Suited for indoor installation

Noise level

<70 dB at 10 m


No Emission

No fuel consumption


HEAT SOURCE: Hot water 1,000 kWth - 43m³/h (3.4 MMBTU/h - 189 GPM)

COOLING: Cold water, direct condenser or air cooling


Temperature heat source

Gross power production

Cold water out 20°C (68 F)

Cold water out 30°C (86 F)


194 F

76 kWe

65 kWe


212 F

85 kWe

74 kWe


230 F

93 kWe

83 kWe


248 F

115 kWe

104 kWe


266 F

124 kWe

113 kWe


284 F

132 kWe

130 kWe

HEAT SOURCE: Low Pressure Steam 1,000 kWth - 1.54 Tons/h - 0.43 kg/s (3.4 MMBTU/h - 3,359 Lbs/h)

COOLING: Cold water out 20°C (68°F)

Steam Pressure

Saturated Steam Temperature

Gross power production

1.5 bara

21.76 psi


232 F

100 kWe

2.0 bara

29.01 psi


248 F

109 kWe

2.8 bara

40.61 psi


268 F

118 kWe

4.0 bara

58.02 psi


289 F

132 kWe