Libros y capítulos de libros ISC - ISC liburuak eta liburuen kapituluak

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Browsing Libros y capítulos de libros ISC - ISC liburuak eta liburuen kapituluak by Author "Astrain Ulibarrena, David"

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    PublicationOpen Access
    Heat exchangers for thermoelectric devices
    (InTechOpen, 2012) Astrain Ulibarrena, David; Martínez Echeverri, Álvaro; Institute of Smart Cities - ISC
    This chapter shows in the first place the influence of heat exchangers on the performance of both thermoelectric generation and thermoelectric refrigeration devices. Then, there are presented different types of heat exchangers specifically designed for dissipating high heat fluxes from the cold and the hot side of thermoelectric devices. After that, the chapter studies the improvement in the efficiency of thermoelectric devices achieved with these heat exchangers. Finally, the concept of thermoelectric self-refrigeration is introduced; this application uses thermoelectric technology for the refrigeration and temperature control of a device, without electricity consumption.
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    PublicationOpen Access
    Thermoelectric power generation optimization by thermal design means
    (InTechOpen, 2016) Aranguren Garacochea, Patricia; Astrain Ulibarrena, David; Mekanika, Energetika eta Materialen Ingeniaritza; Institute of Smart Cities - ISC; Ingeniería Mecánica, Energética y de Materiales
    One of the biggest challenges of the twenty‐first century is to satisfy the demand for electrical energy in an environmentally speaking clean way. Thus, it is very important to search for new alternative energy sources along with increasing the efficiency of current processes. Thermoelectric power generation, by means of harvesting waste heat and converting it into electricity, can help to achieve above‐mentioned goal. Nowadays, efficiency of thermoelectric power generators limits them to become key technology in electric power generation, but their performance has potential of being optimized, if thermal design of such generators is optimized. Heat exchangers located on both sides of thermoelectric modules (TEMs), mass flow of refrigerants and occupancy ratio (the area covered by TEMs related to base area), among others, need to be fine‐tuned in order to obtain the maximum net power generation (thermoelectric power generation minus consumption of auxiliary equipment). Finned dissipator, cold plate, heat pipe and thermosiphon are experimentally tested to maximize net thermoelectric generation on real‐working furnace based on computational model. Maximum generation of 137 MWh/year using thermosiphons is achieved with 32% of area covered by TEMs.