Search results for " solar cooling"
showing 10 items of 11 documents
Energy and economic assessment of desiccant cooling systems coupled with single glazed air and hybrid PV/thermal solar collectors for applications in…
2009
Abstract This paper presents a detailed analysis of the energy and economic performance of desiccant cooling systems (DEC) equipped with both single glazed standard air and hybrid photovoltaic/thermal (PV/t) collectors for applications in hot and humid climates. The use of ‘solar cogeneration’ by means of PV/t hybrid collectors enables the simultaneous production of electricity and heat, which can be directly used by desiccant air handling units, thereby making it possible to achieve very energy savings. The present work shows the results of detailed simulations conducted for a set of desiccant cooling systems operating without any heat storage. System performance was investigated through h…
ECO-design of solar driven systems: A performance comparison between the Italian and the Brazilian context
2013
The paper shows a comparative analysis of the performances of two typologies of solar assisted cooling systems for building applications. In particular, Life Cycle Assessment (LCA) methodology is applied to assess the energy and environmental impacts of solar-assisted, heat-driven chillers and conventional compression chillers driven by grid-connected and stand-alone photovoltaic configurations. LCA is applied in compliance with the international standards of ISO 14040. System boundaries are defined following a “cradle to grave” approach, taking into account all the life-cycle phases including the raw materials supply, the production of the components of the plant, the operation and mainten…
DISPOSITIVO E METODO PER IL CONDIZIONAMENTO DELL’ARIA
2012
Experimental results on adsorption beds for air dehumidification
2016
Desiccant rotors are commonly used in large scale solar cooling open cycle applications. As is well known, adsorption heat sensibly reduces the dehumidification capacity of the desiccant material and results in lower system performance. The aim of this work is to describe an innovative solution that permits simultaneous mass and heat transfer. In particular, two components working with silica gel fixed beds were studied and compared. The first component is a simple packed bed containing silica gel grains. The second component is a fin and tube heat exchanger commonly used in several air conditioning applications wherein the spaces between the fins are filled with silica gel grains. In this …
LIFE CYCLE BALANCES OF SOLAR COOLING SYSTEMS
2009
LIFE CYCLE BALANCES OF SOLAR COOLING SYSTEMS
Comparative results of monitored solar assisted heating and cooling installations
2009
Life Cycle Assessment (LCA) of solar cooling systems with 12 kW absorption and 8 kW adsorption chillers
2011
Analisi comparata di sistemi solari per il condizionamento tramite la metodologia LCA
2013
Lo studio mostra un'applicazione della metodologia Life Cycle Assessment finalizzata alla valutazione delle prestazioni energetico-ambientali di due differenti tipologie di sistemi di raffrescamento che utilizzano energia solare per applicazioni nel settore civili d'utenza. In dettaglio, sono analizzati sistemi energetici basati su macchine frigorifere convenzionali connesse a impianti fotovoltaici e sistemi di solar cooling alimentati da fluidi a bassa temperatura. I risultati evidenziano che le prestazioni energetico-ambientali dei sistemi connessi alla rete sono superiori a quelle degli altri sistemi, mentre la produzione dei sistemi di accumulo limita la competitività dei sistemi stand-…
LCA of a solar heating and cooling system equipped with a small water–ammonia absorption chiller
2012
The development of renewable energy technologies is a critical tool for reducing climate change and the reliance on fossil fuels. However, renewable energy technologies cannot be considered totally clean because they require energy consumption and have environmental impacts that cannot be neglected during their life cycle. In this paper, the life cycle assessment methodology was applied to assess resource use and other environmental burdens related to the entire life-cycle steps of a solar cooling plant. The investigated system works with an absorption chiller assisted by a solar plant. Two back-up configurations (hot back-up and cold back-up) were examined in two localities: Palermo (south…