5 research outputs found
Investigation on tip leakage flow characteristics of radial inflow micro turbine used in helium liquefying system
Expander design procedures and selection criterion for small rated organic rankine cycle systems
The particular aspect of this work is the new approach to expander design procedure
for small rated ORC. In fact, once all the calculation procedures have been defined,
they have been implemented in Matlab code. This code, once the design process is
complete, provides an indication of the optimal expander configuration to adopting
to that specific system. For these reasons, this paper aims to analyze all the preliminary
expanders' design procedures, both dynamic and volumetric. The reasons lie in
the development of low-enthalpy heat recovery systems (systems that allow simultaneous
production of electrical and thermal energy made available in the form of
water at a temperature of 60-90°C), with the aim of optimizing any energy system.
Within these energy systems, the expander is the main component, responsible for
power generation. It is, therefore, necessary and useful to analyze in detail every
expander configuration, highlighting the different features. For each component will
be described the theory on which is based the choice and its design and a possible
software implementation is supplied. Finally, a criterion for the choice of the optimal
expander is proposed, based on some operational considerations and other construction
and structural constraints, such as overall dimensions and weight, lubrication,
MTBF, feasibility, reliability, and coupling with the electric generato