| dc.creator | RICARDO BELTRAN CHACON | |
| dc.date | 2019 | |
| dc.date.accessioned | 2023-07-21T15:32:25Z | |
| dc.date.available | 2023-07-21T15:32:25Z | |
| dc.identifier | http://cimav.repositorioinstitucional.mx/jspui/handle/1004/2653 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7728482 | |
| dc.description | ABSTRACT
This paper proposes direct steam generation by solar radiation falling on an evacuated
tube. Partially filled mass flow of acetone is controlled in a solar evacuated tube
collector (ETC) of an Organic Rankine Cycle (ORC), with the purpose of ensuring the
generation of vapor at all times irrespective of the irradiance from the sun during the
day and night. A system of single pipe in which the subcooled undergoes heating and
evaporation process is analyzed controlled by the variable flow. Mathematical
equations are derived based on energy and mass balances for system components. A
Scilab code is built to simulate the flow of acetone inside the absorber tube and
determine properties of acetone along the pipe. Empirical correlations and
mathematical models of mass flow, for single and two-phase flow, and heat transfer are
used in the simulation. Simulation are run from a subcooled temperature of 60 °C to a
saturation temperature of 120 °C, vapor qualities from 1 - 99 percent and solar
radiation from 600 - 1000 W/m². Two-phase flow observations showed that the
simulation data covered only the fully stratified regimes. The Kattan-Thome-Favrat
flow boiling model is used to obtain the two-phase local heat transfer coefficients
along the tube. The flow boiling model is also successfully compared to the
experimental result of ammonia obtained by Zürcher, O., et al [1]. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc/4.0 | |
| dc.subject | info:eu-repo/classification/cti/2 | |
| dc.subject | info:eu-repo/classification/cti/2 | |
| dc.title | Vapor generation of Acetone for an ORC inside a partially filled solar evacuated tube absorber | |
| dc.type | info:eu-repo/semantics/conferencePaper | |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
