Library

LTP_Lib - Low Temperature Process Library

The Low Temperature Process Library has been designed for modeling low temperature energy conversion processes. It allows you to design and analyze Organic Rankine Cycles (ORC), Supercritical CO2 Cycles (sCO2) and Kalina Cycles. LTP_Lib contains models for both design and off-design analysis.

Working Fluids

The Low Temperature Process Library contains five groups of working fluids:

Organic working fluids
Ammonia-Water mixtures as working fluid
Heat transfer fluids (thermofluids) like thermo oils and salt mixtures
Water
Gaseous working fluids

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Library Author

SimTech GmbH

Keywords

Organic Rankine Cycle, ORC, Kalina Cycle, Supercritical CO2

Version

6.5.17

First Published

7/2008

A_Condenser

condenser for NH3/H2O mixtures, water cooled

A_Condenser_a

condenser forNH3/H2O mixtures, air cooled, dry

A_Connector

connector for NH3/H2O mixtures to be used in closed loops

A_Flash

flash chamber for NH3/H2O mixtures

A_G_Htex

heat exchanger for transfer from NH3/H2O mixtures on hot side to gas on cold side

A_Htex

general purpose heat exchanger for NH3/H2O mixtures

A_Mixer

mixer for NH3/H2O mixtures

A_Pipe

pipe for NH3/H2O mixtures

A_Splitter

splitter for NH3/H2O mixtures

A_Sink

sink for a NH3/H2O stream

A_Source

source for a NH3/H2O stream

A_Turbine

turbine for NH3/H2O mixtures

A_T_Htex

heat exchanger for transfer from NH3/H2O mixture on hot side to a thermofluid on cold side

A_Valve

valve for NH3/H2O mixtures

A_W_Htex

heat exchanger for transfer from NH3/H2O mixture on hot side to water on cold side

A_Xprescription

prescription/calculation of the fluid quality for NH3/H2O mixtures

A_Pump

pump for NH3/H2O mixtures

gear

gears

generator

G_Analyzer

gas analyzer gives detailed information on gas composition

G_A_Htex

heat exchanger for transfer from gas on hot side to NH3/H2O mixtures on cold side

G_Ambient_Sink

release of a gas stream at ambient pressure

G_Ambient_Source

source for an air stream at ambient conditions

G_Compressor

gas compressor

G_Condenser

gas condenser, water cooled

G_Connector

connector for gas streams to be used in closed loops

G_Htex

general purpose heat exchanger for gases

G_Heat_sink

heat sink for gas streams

G_Heat_source

heat source for gas streams

G_Mixer

mixer for gas streams

G_O_Htex

heat exchanger for transfer from gas on hot side to organic fluid on cold side

G_Pipe

pipe for gas streams

G_Sink

sink for a gas stream

G_Source

source for a gas stream

G_Splitter

splitter for gas streams

G_Stream_to_stream

transition piece to change from G_Streams to streams

G_Turbine

turbine for gaseous fluids

G_T_Htex

heat exchanger for transfer from gas on hot side to thermofluids on cold side

G_Valve

valve for gas

G_W_Htex

heat exchanger for transfer from gas on hot side to water on cold side

mech_loss

mechanical loss

motor

optimization

optimization element

O_Boiler

simple boiler model for ORC fluids

O_Compressor

compressor for ORC fluids

O_Condenser

condenser for ORC fluids, water cooled

O_Condenser_a

condenser for ORC fluids, air cooled, dry

O_Connector

connector for ORC streams to be used in closed loops

O_Expander

expander for ORC fluids

O_G_Htex

heat exchanger for transfer from ORC fluid on hot side to gas on cold side

O_Htex

general purpose heat exchanger for ORC fluids

O_Mixer

mixer for ORC streams

O_Pipe

pipe for ORC fluids

O_Pump

pump for ORC fluids

O_Separator

vapour-liquid separator for ORC fluids

O_Splitter

splitter for ORC streams

O_Sink

sink for an ORC stream

O_Source

source for an ORC stream

O_Turbine

turbine for ORC fluids

O_T_Htex

heat exchanger for transfer from ORC fluid on hot side to thermofluid on cold side

O_Valve

valve for ORC fluid

O_W_Htex

heat exchanger for transfer from ORC fluid on hot side to water on cold side

O_Xprescription

prescription/calculation of vapor quality of an ORC fluid

stream_to_G_Stream

transition piece to change from streams to G_Streams

stream_to_W_Stream

transition piece to change from streams to W_Streams

T_A_Htex

heat exchanger for transfer from thermofluid on hot side to NH3/H2O mixture on cold side

T_Connector

connector for heat transfer fluids to be used in closed loops

T_G_Htex

heat exchanger for transfer from thermofluid on hot side to gas on cold side

T_Heat_sink

heat sink for heat transfer fluids

T_Heat_source

heat source for heat transfer fluids

T_Htex

general purpose heat exchanger for heat transfer fluids

T_Mixer

mixer for heat transfer fluid streams

T_O_Htex

heat exchanger for transfer from thermofluid on hot side to ORC fluids on cold side

T_Pipe

pipe for heat transfer fluids

T_Pump

pump for heat transfer fluids

T_Splitter

splitter for heat transfer fluid streams

T_Sink

sink for a heat transfer fluid stream

T_Source

source for a heat transfer fluids

T_Valve

valve for heat transfer fluids

T_W_Htex

heat exchanger for transfer from thermofluid on hot side to water on cold side

W_A_Htex

heat exchanger for transfer from water on hot side to NH3/H2O mixtures on cold side

W_Boiler

simple water/steam boiler model

W_Condenser_a

steam condenser, air cooled, dry

W_Connector

connector for water streams to be used in closed loops

W_Condenser

steam condenser, water cooled

W_Cooling_Tower_dry

dry cooling tower

W_Cooling_Tower_wet

wet cooling tower

W_Deaerator

direct mixing preheater a.k.a. deaerator

W_Drum

steam drum

W_G_Htex

heat exchanger for transfer from water on hot side to gas on cold side

W_Htex

general purpose heat exchanger, water on both sides

W_Heat_sink

heat sink for water streams

W_Heat_source

heat source for water streams

W_Mixer

mixer for water streams

W_O_Htex

heat exchanger for transfer from water on hot side to organic fluid on cold side

W_Pipe

pipe for water

W_Preheater

preheater for water/steam cycles

W_Pump

pump for water

W_Reheater

simple reheater model

W_Separator

separator splitting water into condensate and steam

W_Sink

sink for a water stream

W_Source

source for a water stream

W_Splitter

splitter for water streams

W_Stream_to_stream

transition piece to change from W_Streams to streams

W_Turbine

steam turbine

W_Turbine_end

steam turbine, end stage

W_T_Htex

heat exchanger for transfer from water on hot side to thermofluids on cold side

W_Valve

valve for water

W_Xprescription

prescription/calculation of steam quality

conditional_setting

free conditional equation to set selected variables

free_var

free variable

Carnot battery HP-ORC

The reversible combination of a heat pump and an organic rankine cycle process coupled via a thermal storage device forms a so-called Carnot battery. In this example both processes use the same working fluid and can share major process components as the heat exchangers.