Solar energy as a renewable resource for cooling

The thesis contains mainly two parts: 1) the solar energy resource assessment through measurements and comparison of solar irradiance models and analysis of atmospheric turbidity factors; 2) Sensitivity analysis of solar cooling system, monitoring on solar cooling system and pre-design of a solar cooling system test rig in Politecnico di Torino. Firstly, the solar energy resource assessment is based on the measurements of solar beam normal irradiance and solar global horizontal irradiance in Turin during the whole 2010 with available data from end of January until end of December except two thirds of August when the Politecnico di Torino was closed since the campaign was carried on inside the department of Energy. Measured data have been compared with clear-sky models and the atmospheric turbidity factors have been calculated and compared with that in 1975-6 to evaluate the air-quality variation during the last three decades. Secondly, a series of sensitivity analysis on solar cooling system with various configurations has been undertaken through simulation software Polysun. Field data of solar cooling system in IPLA (Istituto per le Piante da Legno e l’Ambiente) have been monitored and analyzed. The main conclusions are: The ASHRAE clear-sky model mostly fits the solar beam normal irradiance while it has been found that the solar diffuse radiation factor ‘C’ (C=Gdh/Gbn) actually not constant but varies all through the day in a typical way; The turbidity factors are lower in 2010 during winter time due to usage of cleaner fuels and district heating while during summer they increase due to heavier traffic; Solar factor (SF) increases as solar collector area is larger, but its increasing ratio is decreasing and SF decreases as volume size of storage tank is bigger after the demand side is satisfied; the three-week monitoring campaign has shown a satisfactory performance of this solar cooling system in PUEEL, although the solar installation appears oversized.

Grantor dc:publisher

Politecnico di Torino

Year dc:date

2012

Author dc:creator

• YANG, YINGYING

• Settore ING-IND/11 - Fisica Tecnica Ambientale

Statement dc:rights

• info:eu-repo/semantics/openAccess
• license:Pubblico - Tutti i diritti riservati

Language dc:language

enm

Identifier

10.6092/polito/porto/2496931

OAI identifier oai:identifier

oai:iris.polito.it:11583/2496931