ResearchArticle Effects of Different Target Solar Fractions on Providing Heat Required for Space Heating, Sanitary Hot Water, and Swimming Pool in Iran: A Case Study in Cold Climate Nastaran Saberi Shahmarvandi, 1 Fateme Shahrokh Ghahfarokhi, 1 Zahra Delshad Chermahini, 1 Atefeh Faramarzi, 1 Alireza Raisi, 1 Reza Alayi , 2 and Ahmad Tahmasebi 3 1 Department of Biomedical Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran 2 Department of Mechanics, Germi Branch, Islamic Azad University, Germi, Iran 3 Research and Development Department, Pars Regulator Company, Tehran, Iran Correspondence should be addressed to Reza Alayi; reza.alayi@yahoo.com Received 10 September 2021; Revised 11 February 2022; Accepted 16 February 2022; Published 7 March 2022 Academic Editor: Yongping Chen Copyright © 2022 Nastaran Saberi Shahmarvandi et al. is is an open access article distributed under the Creative Commons AttributionLicense,whichpermitsunrestricteduse,distribution,andreproductioninanymedium,providedtheoriginalworkis properly cited. Due to limited fossil fuel resources, population growth, and the need to save energy and prevent the emission of pollutants, solar heatingisofgreatimportanceasastrategicsolution.Duetothesecases,inthepresentwork,forthefirsttime,theuseofflatplate solar water heaters (SWHs) in Shahrekord located in the cold climate of Iran has been studied. e aim is to supply heating for space, sanitary hot water, and swimming pool of a residential apartment. Also, technical-economic-energy-environmental analyses have been done. ree low, medium, and high solar fraction scenarios have been selected for evaluations, and one-year dynamic analysis has been performed by TSOL 2018 commercial software. e required climatic data have been extracted by Meteonorm 7.3 software. e results showed that in most cases of heat supply, i.e., high solar fraction scenario, the percentage of solar heat supply for sanitary hot water, space heating, and swimming pool is 97.8%, 22.3%, and 44.3%, respectively, and the total solar fraction is 41%. Also, in this case, the release of more than 4 tons of CO 2 pollutants has been prevented. Energy balance diagramsfordifferentscenariosshowedthat60%oflossesareopticalandthermalandalsothehighestrateoflosseswasrelatedto theswimmingpool.elowestcostofheatgeneratedandthelowestpaybacktimewere$0.028/kWhand11.4years,respectively, which were related to the high solar fraction scenario. 1. Introduction Energy consumption reflects the socioeconomic growth rate of any country today [1]. Energy from fossil fuels produces a large number of greenhouse gases, which is the main cause of global warming [2–4]. e effects of global warming can be seen in almost every part of the world [5]. It is predicted that if the current emission rate continues, global warming will increase by 1.5 ° C at an average surface temperature between 2030 and 2052 [6–8]. Dealing with the undesirable effects of climate change is the biggest concern of society around the world [9–12]. A possible solution is to take benefit of renewable technologies and replace fossil tech- nologies with them [13–17]. Among all renewable energy sources, solar energy is widely available and is present in almost all parts of the world [18–23]. In recent decades, global solar thermal capacity has increased sharply and is now widely used around the world to provide heating and cooling [24–28]. In 2019, solar heating systems generated 479GW of heat, equivalent to 43 million tons of oil saved, which prevented the release of 138 million tons of CO 2 (Figure 1) [30]. Figure 2 illustrates the geographical breakdown of the cumulatively installed solar water heating capacity by the Hindawi Journal of Engineering Volume 2022, Article ID 2720057, 10 pages https://doi.org/10.1155/2022/2720057