Theoretical Analysis of Vacuum Flat-plate Solar Collector with a Detailed Model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00313361" target="_blank" >RIV/68407700:21220/17:00313361 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21720/17:00313361

Výsledek na webu

<a href="http://proceedings.ises.org" target="_blank" >http://proceedings.ises.org</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.18086/eurosun.2016.07.06" target="_blank" >10.18086/eurosun.2016.07.06</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Theoretical Analysis of Vacuum Flat-plate Solar Collector with a Detailed Model

Popis výsledku v původním jazyce

Flat-plate collectors are generally designed for applications with typical working temperatures between 40 °C and 60 °C, which is mostly the case for domestic hot water systems. The major effect on the performance of flat solar collector has heat loss through glazing. The reduction of front side heat loss and consequently increasing efficiency can be achieved by using vacuum glazing. The paper presents a theoretical analysis of flat-plate solar collectors with a vacuum glazing. Different configurations of the collector have been investigated by a detailed theoretical model based on combined external and internal energy balance of the absorber. Performance characteristics for vacuum flat-plate collector alternatives have been derived. Subsequently, annual energy gains have been evaluated for a selected variant and compared with state-of-art vacuum tube collectors. The results of modeling indicate, that in case of using advanced vacuum glazing with special low-emissivity coating (emissivity 0.20, solar transmittance 0.85), it is possible to achieve efficiency parameters similar to or even better than vacuum tube collectors.

Název v anglickém jazyce

Theoretical Analysis of Vacuum Flat-plate Solar Collector with a Detailed Model

Popis výsledku anglicky

Flat-plate collectors are generally designed for applications with typical working temperatures between 40 °C and 60 °C, which is mostly the case for domestic hot water systems. The major effect on the performance of flat solar collector has heat loss through glazing. The reduction of front side heat loss and consequently increasing efficiency can be achieved by using vacuum glazing. The paper presents a theoretical analysis of flat-plate solar collectors with a vacuum glazing. Different configurations of the collector have been investigated by a detailed theoretical model based on combined external and internal energy balance of the absorber. Performance characteristics for vacuum flat-plate collector alternatives have been derived. Subsequently, annual energy gains have been evaluated for a selected variant and compared with state-of-art vacuum tube collectors. The results of modeling indicate, that in case of using advanced vacuum glazing with special low-emissivity coating (emissivity 0.20, solar transmittance 0.85), it is possible to achieve efficiency parameters similar to or even better than vacuum tube collectors.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/ED2.1.00%2F03.0091" target="_blank" >ED2.1.00/03.0091: Univerzitní centrum energeticky efektivních budov (UCEEB)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the ISES EuroSun 2016 Conference

ISBN

978-3-9814659-6-9

ISSN

—

e-ISSN

—

Počet stran výsledku

11

Strana od-do

1109-1119

Název nakladatele

International Solar Energy Society

Místo vydání

Freiburg

Místo konání akce

Palma de Mallorca

Datum konání akce

11. 10. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000426895100112