Thermolib performs all computations in SI-units (kg, mol, K, J, W, s, ...). Conversions into other units (g, kmol, F, kWh, Ws, min, ...) can be easily done by using the unit conversion block. A sensor block can be attached anywhere to a flow inside a model to 'measure' any thermodynamical property of interest (e. g. mass flow, volume flow, enthalpy flow, concentrations, vapor fractions, relative humidity) in the desired physical units.

Each Thermolib block contains a balancing function. At the end of the simulation, the balances of mass and enthalpy can either be viewed in MATLAB® workspace or in Excel or ASCII files. Separate balancing blocks permit individual boundary definition of the subsystems to be balanced.

Thermolib supports computation of quasi stationary hydraulic networks. It contains the most relevant blocks for handling hydraulics, e. g. a splitter, a mixer, pressure valves, reservoirs, pumps and compressors as well as auxiliary elements. Pressure feedback is explicitly modeled with separate feedback signals. Automatic generation of feedback pressure connections is supported via special integrated tools.