ORC Low Temperature

A low temperature ORC converts waste heat from 85°C to 115°C. One unit can valorize up to 3MWth. The machine can be delivered with a genset of 55kWe up to 250kWe. You can easily mount this type of ORC on the jacket cooling of biogas engines or use it to recover waste heat of a district heating net.

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ORC Low Temperature Cooling Circuits

A low temperature ORC operates ideally with a cooling circuit of 25°C to 35°C or lower. Depending on the temperatures of the supplied heat, the cooling could be increased up to 45°C. E-RATIONAL offers different cooling circuits with sea water, river water or similar. Even when there is no cooling water available on site we can deliver a suitable solution.

 

Heat source inlet temperatures 85 - 115°C
10ft container ≤ 1.5MWth
20ft container ≤ 3MWth
Recuperators (internal heat optimization) N/A
Direct air cooled condensers Optional
ORC cooling for heating purpose (CHP mode) ≤ 45°C
Off-grid integration (island mode) Optional
Double grid connection
(grid consumption and grid injection separated)
Optional
Range of net efficiency 5 – 8%
Capacitor bank Optional
MACHINE SIZE 10ft machine 20ft machine
OPERATING PARAMETERS
Range of thermal input 0.5 – 1.5MWth 1.5 – 3MWth
Range of installed electric power 90 – 160kWe 90 – 250kWe
Efficiency 5 – 8% 5 – 8%
Noise level at 10m < 90dB < 75dB
Heat source Hot water, Steam, Thermal oil
Cooling system Closed loop water cooling, Wet cooling tower, Direct air cooled condenser
Required utilities Instrument air (≥ 6barg)
CONFIGURATION INFORMATION
Standard flange connections DN150 PN16 DN150 PN16 or DN200 PN16
Expander E-RATIONAL single screw expander
Generator type Asynchronous – 2 pole – 3 phase – 380-460VAC
50Hz – 3000RPM
60Hz – 3600RPM
Standard heat exchangers Copper brazed AISI plate heat exchangers
Pump Multistage in-line centrifugal pump
Control system Siemens PLC + Siemens operating panel
Housing IP32: Suitable for indoor IP55: Suitable for outdoor
Machine weight 6 ton 17 ton
Applied EU-norms Machine directive 2006/42/EG
EMC directive 2004/108/EG
Low voltage directive 2014/35/EG
PED 2014/68/EU

 

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Reference Applications

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Typical Applications

Typical applications for this machine type include:

  ORC LT ORC HT ORC UHT
Heat source inlet temperatures 85 - 115°C 105 - 135°C 130 - 175°C
10ft container ≤ 1.5MWth ≤ 1.5MWth ≤ 1.5MWth
20ft container ≤ 3MWth ≤ 3MWth ≤ 3MWth
Recuperators (internal heat optimization) N/A Optional Optional
Direct air cooled condensers Optional Optional Optional
ORC cooling for heating purpose (CHP mode) ≤ 45°C ≤ 60°C ≤ 95°C
Off-grid integration (island mode) Optional Optional Optional
Double grid connection
(grid consumption and grid injection separated)
Optional Optional Optional
Range of net efficiency 5 – 8% 6.5 – 10.5% 6.5 – 10.5%
Capacitor bank Optional Optional Optional