ZEMCH 2015 - International Conference Proceedings | Page 686

Solar based systems for cooling of buildings - Literature review The optimal system configuration for a 11 kW lithium bromide-water absorption chiller installed in Cyprus was found varying the collector array size, orientation and type, as well as the thermal storage capacity of the system, using the TRNSYS simulation software (Florides et al. 2002:1313-1325). The performance of a solar absorption cooler modeled through the use of TRNSYS software, considering three building types in three climatic locations in Europe showed that the annual costs were lower when compared to standard cooling systems, but only a 60% of solar fraction acted for an annual saving of 35%-45%, due to the increase in maintenance costs (Mateus and Oliveira 2008:949-957). Wang et al. described various methods for solar cooling into small-scale residential applications, highlighting advantages and disadvantages of each of the different systems (Wang et al. 2009:638-659). Lafuenti et al. proposed some system innovations about the existing solutions of solar cooling, with the aim of their adaptation to hot and humid climates (Lafuenti et al. 2012:1-7). According to a study by The Centre for Renewable Energy Sources and Saving (CRES), the solar driven systems can cover 10-60% of the combined space heating/cooling and DHW demand at southern, northern and central European countries (CRES 2011). A life-cycle analysis made on a LiBr absorption chiller, using evacuated tube collectors, showed that comparing this solar driven system to one with a conventional vapor compression unit, the Global Energy Requirement (GER) and Global Warming Potential (GWP) were reduced by 25% to 50% (Beccali et al. 2012). A research carried out in 2012 (Shesho 2014:102) on a solar assisted air-conditioning system modeled in TRNSYS, defined with vacuum tube collectors, storage tank, auxiliary heater and absorption machine for a building collocated in Macedonia, showed that the specific indicators for solar fraction, in regard