Absorption power cycles for low-temperature heat sources using aqueous salt solutions as working fluids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00310428" target="_blank" >RIV/68407700:21220/17:00310428 - isvavai.cz</a>

Result on the web

<a href="http://onlinelibrary.wiley.com/doi/10.1002/er.3671/full" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/er.3671/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/er.3671" target="_blank" >10.1002/er.3671</a>

Result language

angličtina

Original language name

Absorption power cycles for low-temperature heat sources using aqueous salt solutions as working fluids

Original language description

There are many low-temperature heat sources; however, current technologies for their utilization have a relatively low efficiency and high cost. The leading technology in the low-temperature domain for heat-to-work conversion is the organic Rankine cycle (ORC). Absorption power cycles (APCs) are a second option. Nearly all currently known APCs, most importantly the Kalina cycle, use a water-ammonia mixture as their working fluids. This paper offers a theoretical exploration of the possibility of utilizing aqueous solutions of three salts (lithium bromide, lithium chloride and calcium chloride), known mainly from absorption cooling, as working fluids for APCs. The cycles are compared with a typical steam Rankine cycle, a water-ammonia APC, and (subcritical) ORCs with a range of working fluids explored. The analysis includes a parasitic load for heat rejection by a cooling tower or air-cooled condenser. The absorption cycles exhibit better performance than all Rankine-based cycles analysed in temperatures below 120°C. For the LiBr-based APC, a detailed thermal design of the cycle is provided for 100°C water as a heat source and a sensitivity analysis is performed of the parameters controlling the main cycle. Mechanical design considerations should not pose a problem for small power units, especially in the case of expansion machines, which are often problematic in ORCs. The salt-based APCs also carry environmental benefits, as the salts utilized in the working fluids are non-toxic.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20704 - Energy and fuels

Project

—

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Energy Research

ISSN

0363-907X

e-ISSN

1099-114X

Volume of the periodical

41

Issue of the periodical within the volume

7

Country of publishing house

US - UNITED STATES

Number of pages

24

Pages from-to

952-975

UT code for WoS article

000403300200003

EID of the result in the Scopus database

2-s2.0-85028254425