\documentclass[11pt,twoside]{article}\makeatletter

\IfFileExists{xcolor.sty}%
  {\RequirePackage{xcolor}}%
  {\RequirePackage{color}}
\usepackage{colortbl}
\usepackage{wrapfig}
\usepackage{ifxetex}
\ifxetex
  \usepackage{fontspec}
  \usepackage{xunicode}
  \catcode`⃥=\active \def⃥{\textbackslash}
  \catcode`❴=\active \def❴{\{}
  \catcode`❵=\active \def❵{\}}
  \def\textJapanese{\fontspec{Noto Sans CJK JP}}
  \def\textChinese{\fontspec{Noto Sans CJK SC}}
  \def\textKorean{\fontspec{Noto Sans CJK KR}}
  \setmonofont{DejaVu Sans Mono}
  
\else
  \IfFileExists{utf8x.def}%
   {\usepackage[utf8x]{inputenc}
      \PrerenderUnicode{–}
    }%
   {\usepackage[utf8]{inputenc}}
  \usepackage[english]{babel}
  \usepackage[T1]{fontenc}
  \usepackage{float}
  \usepackage[]{ucs}
  \uc@dclc{8421}{default}{\textbackslash }
  \uc@dclc{10100}{default}{\{}
  \uc@dclc{10101}{default}{\}}
  \uc@dclc{8491}{default}{\AA{}}
  \uc@dclc{8239}{default}{\,}
  \uc@dclc{20154}{default}{ }
  \uc@dclc{10148}{default}{>}
  \def\textschwa{\rotatebox{-90}{e}}
  \def\textJapanese{}
  \def\textChinese{}
  \IfFileExists{tipa.sty}{\usepackage{tipa}}{}
\fi
\def\exampleFont{\ttfamily\small}
\DeclareTextSymbol{\textpi}{OML}{25}
\usepackage{relsize}
\RequirePackage{array}
\def\@testpach{\@chclass
 \ifnum \@lastchclass=6 \@ne \@chnum \@ne \else
  \ifnum \@lastchclass=7 5 \else
   \ifnum \@lastchclass=8 \tw@ \else
    \ifnum \@lastchclass=9 \thr@@
   \else \z@
   \ifnum \@lastchclass = 10 \else
   \edef\@nextchar{\expandafter\string\@nextchar}%
   \@chnum
   \if \@nextchar c\z@ \else
    \if \@nextchar l\@ne \else
     \if \@nextchar r\tw@ \else
   \z@ \@chclass
   \if\@nextchar |\@ne \else
    \if \@nextchar !6 \else
     \if \@nextchar @7 \else
      \if \@nextchar (8 \else
       \if \@nextchar )9 \else
  10
  \@chnum
  \if \@nextchar m\thr@@\else
   \if \@nextchar p4 \else
    \if \@nextchar b5 \else
   \z@ \@chclass \z@ \@preamerr \z@ \fi \fi \fi \fi
   \fi \fi  \fi  \fi  \fi  \fi  \fi \fi \fi \fi \fi \fi}
\gdef\arraybackslash{\let\\=\@arraycr}
\def\@textsubscript#1{{\m@th\ensuremath{_{\mbox{\fontsize\sf@size\z@#1}}}}}
\def\Panel#1#2#3#4{\multicolumn{#3}{){\columncolor{#2}}#4}{#1}}
\def\abbr{}
\def\corr{}
\def\expan{}
\def\gap{}
\def\orig{}
\def\reg{}
\def\ref{}
\def\sic{}
\def\persName{}\def\name{}
\def\placeName{}
\def\orgName{}
\def\textcal#1{{\fontspec{Lucida Calligraphy}#1}}
\def\textgothic#1{{\fontspec{Lucida Blackletter}#1}}
\def\textlarge#1{{\large #1}}
\def\textoverbar#1{\ensuremath{\overline{#1}}}
\def\textquoted#1{‘#1’}
\def\textsmall#1{{\small #1}}
\def\textsubscript#1{\@textsubscript{\selectfont#1}}
\def\textxi{\ensuremath{\xi}}
\def\titlem{\itshape}
\newenvironment{biblfree}{}{\ifvmode\par\fi }
\newenvironment{bibl}{}{}
\newenvironment{byline}{\vskip6pt\itshape\fontsize{16pt}{18pt}\selectfont}{\par }
\newenvironment{citbibl}{}{\ifvmode\par\fi }
\newenvironment{docAuthor}{\ifvmode\vskip4pt\fontsize{16pt}{18pt}\selectfont\fi\itshape}{\ifvmode\par\fi }
\newenvironment{docDate}{}{\ifvmode\par\fi }
\newenvironment{docImprint}{\vskip 6pt}{\ifvmode\par\fi }
\newenvironment{docTitle}{\vskip6pt\bfseries\fontsize{22pt}{25pt}\selectfont}{\par }
\newenvironment{msHead}{\vskip 6pt}{\par}
\newenvironment{msItem}{\vskip 6pt}{\par}
\newenvironment{rubric}{}{}
\newenvironment{titlePart}{}{\par }

\newcolumntype{L}[1]{){\raggedright\arraybackslash}p{#1}}
\newcolumntype{C}[1]{){\centering\arraybackslash}p{#1}}
\newcolumntype{R}[1]{){\raggedleft\arraybackslash}p{#1}}
\newcolumntype{P}[1]{){\arraybackslash}p{#1}}
\newcolumntype{B}[1]{){\arraybackslash}b{#1}}
\newcolumntype{M}[1]{){\arraybackslash}m{#1}}
\definecolor{label}{gray}{0.75}
\def\unusedattribute#1{\sout{\textcolor{label}{#1}}}
\DeclareRobustCommand*{\xref}{\hyper@normalise\xref@}
\def\xref@#1#2{\hyper@linkurl{#2}{#1}}
\begingroup
\catcode`\_=\active
\gdef_#1{\ensuremath{\sb{\mathrm{#1}}}}
\endgroup
\mathcode`\_=\string"8000
\catcode`\_=12\relax

\usepackage[a4paper,twoside,lmargin=1in,rmargin=1in,tmargin=1in,bmargin=1in,marginparwidth=0.75in]{geometry}
\usepackage{framed}

\definecolor{shadecolor}{gray}{0.95}
\usepackage{longtable}
\usepackage[normalem]{ulem}
\usepackage{fancyvrb}
\usepackage{fancyhdr}
\usepackage{graphicx}
\usepackage{marginnote}

\renewcommand{\@cite}[1]{#1}


\renewcommand*{\marginfont}{\itshape\footnotesize}

\def\Gin@extensions{.pdf,.png,.jpg,.mps,.tif}

  \pagestyle{fancy}

\usepackage[pdftitle={Using Solar Energy to Build Air Conditioning -A Case Study of Libya},
 pdfauthor={}]{hyperref}
\hyperbaseurl{}

	 \paperwidth210mm
	 \paperheight297mm
              
\def\@pnumwidth{1.55em}
\def\@tocrmarg {2.55em}
\def\@dotsep{4.5}
\setcounter{tocdepth}{3}
\clubpenalty=8000
\emergencystretch 3em
\hbadness=4000
\hyphenpenalty=400
\pretolerance=750
\tolerance=2000
\vbadness=4000
\widowpenalty=10000

\renewcommand\section{\@startsection {section}{1}{\z@}%
     {-1.75ex \@plus -0.5ex \@minus -.2ex}%
     {0.5ex \@plus .2ex}%
     {\reset@font\Large\bfseries}}
\renewcommand\subsection{\@startsection{subsection}{2}{\z@}%
     {-1.75ex\@plus -0.5ex \@minus- .2ex}%
     {0.5ex \@plus .2ex}%
     {\reset@font\Large}}
\renewcommand\subsubsection{\@startsection{subsubsection}{3}{\z@}%
     {-1.5ex\@plus -0.35ex \@minus -.2ex}%
     {0.5ex \@plus .2ex}%
     {\reset@font\large}}
\renewcommand\paragraph{\@startsection{paragraph}{4}{\z@}%
     {-1ex \@plus-0.35ex \@minus -0.2ex}%
     {0.5ex \@plus .2ex}%
     {\reset@font\normalsize}}
\renewcommand\subparagraph{\@startsection{subparagraph}{5}{\parindent}%
     {1.5ex \@plus1ex \@minus .2ex}%
     {-1em}%
     {\reset@font\normalsize\bfseries}}


\def\l@section#1#2{\addpenalty{\@secpenalty} \addvspace{1.0em plus 1pt}
 \@tempdima 1.5em \begingroup
 \parindent \z@ \rightskip \@pnumwidth 
 \parfillskip -\@pnumwidth 
 \bfseries \leavevmode #1\hfil \hbox to\@pnumwidth{\hss #2}\par
 \endgroup}
\def\l@subsection{\@dottedtocline{2}{1.5em}{2.3em}}
\def\l@subsubsection{\@dottedtocline{3}{3.8em}{3.2em}}
\def\l@paragraph{\@dottedtocline{4}{7.0em}{4.1em}}
\def\l@subparagraph{\@dottedtocline{5}{10em}{5em}}
\@ifundefined{c@section}{\newcounter{section}}{}
\@ifundefined{c@chapter}{\newcounter{chapter}}{}
\newif\if@mainmatter 
\@mainmattertrue
\def\chaptername{Chapter}
\def\frontmatter{%
  \pagenumbering{roman}
  \def\thechapter{\@roman\c@chapter}
  \def\theHchapter{\roman{chapter}}
  \def\thesection{\@roman\c@section}
  \def\theHsection{\roman{section}}
  \def\@chapapp{}%
}
\def\mainmatter{%
  \cleardoublepage
  \def\thechapter{\@arabic\c@chapter}
  \setcounter{chapter}{0}
  \setcounter{section}{0}
  \pagenumbering{arabic}
  \setcounter{secnumdepth}{6}
  \def\@chapapp{\chaptername}%
  \def\theHchapter{\arabic{chapter}}
  \def\thesection{\@arabic\c@section}
  \def\theHsection{\arabic{section}}
}
\def\backmatter{%
  \cleardoublepage
  \setcounter{chapter}{0}
  \setcounter{section}{0}
  \setcounter{secnumdepth}{2}
  \def\@chapapp{\appendixname}%
  \def\thechapter{\@Alph\c@chapter}
  \def\theHchapter{\Alph{chapter}}
  \appendix
}
\newenvironment{bibitemlist}[1]{%
   \list{\@biblabel{\@arabic\c@enumiv}}%
       {\settowidth\labelwidth{\@biblabel{#1}}%
        \leftmargin\labelwidth
        \advance\leftmargin\labelsep
        \@openbib@code
        \usecounter{enumiv}%
        \let\p@enumiv\@empty
        \renewcommand\theenumiv{\@arabic\c@enumiv}%
	}%
  \sloppy
  \clubpenalty4000
  \@clubpenalty \clubpenalty
  \widowpenalty4000%
  \sfcode`\.\@m}%
  {\def\@noitemerr
    {\@latex@warning{Empty `bibitemlist' environment}}%
    \endlist}

\def\tableofcontents{\section*{\contentsname}\@starttoc{toc}}
\parskip0pt
\parindent1em
\def\Panel#1#2#3#4{\multicolumn{#3}{){\columncolor{#2}}#4}{#1}}
\newenvironment{reflist}{%
  \begin{raggedright}\begin{list}{}
  {%
   \setlength{\topsep}{0pt}%
   \setlength{\rightmargin}{0.25in}%
   \setlength{\itemsep}{0pt}%
   \setlength{\itemindent}{0pt}%
   \setlength{\parskip}{0pt}%
   \setlength{\parsep}{2pt}%
   \def\makelabel##1{\itshape ##1}}%
  }
  {\end{list}\end{raggedright}}
\newenvironment{sansreflist}{%
  \begin{raggedright}\begin{list}{}
  {%
   \setlength{\topsep}{0pt}%
   \setlength{\rightmargin}{0.25in}%
   \setlength{\itemindent}{0pt}%
   \setlength{\parskip}{0pt}%
   \setlength{\itemsep}{0pt}%
   \setlength{\parsep}{2pt}%
   \def\makelabel##1{\upshape ##1}}%
  }
  {\end{list}\end{raggedright}}
\newenvironment{specHead}[2]%
 {\vspace{20pt}\hrule\vspace{10pt}%
  \phantomsection\label{#1}\markright{#2}%

  \pdfbookmark[2]{#2}{#1}%
  \hspace{-0.75in}{\bfseries\fontsize{16pt}{18pt}\selectfont#2}%
  }{}
      \def\TheFullDate{2021 2021-05-15 (revised: 25 Year 2021 15 May 2021)}
\def\TheID{\makeatother }
\def\TheDate{2021 2021-05-15}
\title{Using Solar Energy to Build Air Conditioning -A Case Study of Libya}
\author{}\makeatletter 
\makeatletter
\newcommand*{\cleartoleftpage}{%
  \clearpage
    \if@twoside
    \ifodd\c@page
      \hbox{}\newpage
      \if@twocolumn
        \hbox{}\newpage
      \fi
    \fi
  \fi
}
\makeatother
\makeatletter
\thispagestyle{empty}
\markright{\@title}\markboth{\@title}{\@author}
\renewcommand\small{\@setfontsize\small{9pt}{11pt}\abovedisplayskip 8.5\p@ plus3\p@ minus4\p@
\belowdisplayskip \abovedisplayskip
\abovedisplayshortskip \z@ plus2\p@
\belowdisplayshortskip 4\p@ plus2\p@ minus2\p@
\def\@listi{\leftmargin\leftmargini
               \topsep 2\p@ plus1\p@ minus1\p@
               \parsep 2\p@ plus\p@ minus\p@
               \itemsep 1pt}
}
\makeatother
\fvset{frame=single,numberblanklines=false,xleftmargin=5mm,xrightmargin=5mm}
\fancyhf{} 
\setlength{\headheight}{14pt}
\fancyhead[LE]{\bfseries\leftmark} 
\fancyhead[RO]{\bfseries\rightmark} 
\fancyfoot[RO]{}
\fancyfoot[CO]{\thepage}
\fancyfoot[LO]{\TheID}
\fancyfoot[LE]{}
\fancyfoot[CE]{\thepage}
\fancyfoot[RE]{\TheID}
\hypersetup{citebordercolor=0.75 0.75 0.75,linkbordercolor=0.75 0.75 0.75,urlbordercolor=0.75 0.75 0.75,bookmarksnumbered=true}
\fancypagestyle{plain}{\fancyhead{}\renewcommand{\headrulewidth}{0pt}}

\date{}
\usepackage{authblk}

\providecommand{\keywords}[1]
{
\footnotesize
  \textbf{\textit{Index terms---}} #1
}

\usepackage{graphicx,xcolor}
\definecolor{GJBlue}{HTML}{273B81}
\definecolor{GJLightBlue}{HTML}{0A9DD9}
\definecolor{GJMediumGrey}{HTML}{6D6E70}
\definecolor{GJLightGrey}{HTML}{929497} 

\renewenvironment{abstract}{%
   \setlength{\parindent}{0pt}\raggedright
   \textcolor{GJMediumGrey}{\rule{\textwidth}{2pt}}
   \vskip16pt
   \textcolor{GJBlue}{\large\bfseries\abstractname\space}
}{%   
   \vskip8pt
   \textcolor{GJMediumGrey}{\rule{\textwidth}{2pt}}
   \vskip16pt
}

\usepackage[absolute,overlay]{textpos}

\makeatother 
      \usepackage{lineno}
      \linenumbers
      
\begin{document}

             \author[1]{Monaem  Elmnifi}

             \affil[1]{  Bright Star University}

\renewcommand\Authands{ and }

\date{\small \em Received: 12 April 2021 Accepted: 2 May 2021 Published: 15 May 2021}

\maketitle


\begin{abstract}
        


The aim of this study is the evaluation of the economic and technical viability for the installation of a solar air conditioning system based on parabolic solar concentrators and adsorption technology, in an existent building. As case study was selected a bright star university located in elbrega city- Libya. Besides air conditioning, this system is also used for domestic hot water production. This solution enables the system use throughout the year in order to maximize the investment and reducing environmental pollution resulting from the use of fossil fuels in energy production. Results show that the implementation of these systems is feasible for the Libya reality and the climatic conditions enjoyed by most Libyan cities in terms of the intensity of solar radiation and most of the land is predominantly desert.

\end{abstract}


\keywords{solar energy, solar cooling, adsorption cooling, parabolic trough solar collectors}

\begin{textblock*}{18cm}(1cm,1cm) % {block width} (coords) 
\textcolor{GJBlue}{\LARGE Global Journals \LaTeX\ JournalKaleidoscope\texttrademark}
\end{textblock*}

\begin{textblock*}{18cm}(1.4cm,1.5cm) % {block width} (coords) 
\textcolor{GJBlue}{\footnotesize \\ Artificial Intelligence formulated this projection for compatibility purposes from the original article published at Global Journals. However, this technology is currently in beta. \emph{Therefore, kindly ignore odd layouts, missed formulae, text, tables, or figures.}}
\end{textblock*}


\let\tabcellsep& 	 	 		 \par
ibya lies in the center of North Africa between latitudes 20 -33 ° N and longitude 10 -25 ° E. The country is located in the Sun Earth belt and about 88\% of its territory is considered in the desert. According to the report of the Institute of Thermodynamics Engineering at the German Space Center in Stuttgart \hyperref[b1]{[1]}. Which shows that direct natural solar radiation varies from 1900 kWh / m 2 / year in the far north of the country to more than 2,800 kWh / m 2 /year in parts of the southeast. Concentrated solar power plants can be considered economically valuable only for sites with direct solar radiation above 1800 kWh / m 2 / year \hyperref[b2]{[2]}. All Libyan lands can meet this condition with higher potential than the southern parts of the country.\par
The sector of buildings is, on a global scale, one of the largest energy consumers (together with transport and industry sectors), becoming essential to ensure a higher energetic and environmental efficiency, thermal comfort and health conditions. Over time arose solutions to answer more directly to users comfort needs. One solution was the widespread use of air conditioning systems based on electric driven compression technology, which have improved greatly the quality of indoor environment in buildings. However, these systems improved greatly the quality of indoor environment in buildings. However, these systems Author: Department of Mechanical Engineering, Bright Star University, Libya. e-mail: monm.hamad@yahoo.com heating and cooling, as well as, and nowadays represent an important share in the overall consumption of the building With comfort levels ever higher, the costs associated with air conditioning has been increasing and is expected that this growth will be even more pronounced in coming years, either due to the rising standards in comfort required by the occupants or even due to climate changes  {\ref [3][4]}.\par
Nowadays in Libya, buildings account for about 60\% of the electric energy consumption and about 30\% of primary energy consumption \hyperref[b5]{[5]}, this makes this sector a target for intervention as regard the improvement of energy efficiency ratings. Thus, any measure to keep or improve standards in indoor comfort and at the same time allowing the reduction in the energetic bill should be aim of interest and study. With this in mind, this study proposes to analyze the use of a solar based system to obtain the required thermal energy for heating and cooling, as well as the production of Domestic Hot Water (DHW). Solar cooling is a solar thermal technology that produces cold by exploiting solar energy allowing significant savings compared with traditional air conditioning plants. This is also due to the fact that the main cooling demand can be covered at the moment of maximum solar radiation. Solar energy is used to provide heat to a thermodynamic cycle that allows to produce cold water \hyperref[b6]{[6]}. 
\section[{a) Parabolic Troughs}]{a) Parabolic Troughs}\par
Parabolic troughs are collectors designed to reach temperatures over 100ºC and up to 450ºC (with a concentration ratio around 26) and still keeping high efficiency due to a large solar energy collecting area with a small absorber surface. 
\section[{Introduction II.}]{Introduction II.} 
\section[{Technology}]{Technology}\par
Abstract-The aim of this study is the evaluation of the economic and technical viability for the installation of a solar air conditioning system based on parabolic solar concentrators and adsorption technology, in an existent building. As case study was selected a bright star university located in elbrega city-Libya. Besides air conditioning, this system is also used for domestic hot water production. This solution enables the system use throughout the year in order to maximize the investment and reducing environmental pollution resulting from the use of fossil fuels in energy production. Results show that the implementation of these systems is feasible for the Libya reality and the climatic conditions enjoyed by most Libyan cities in terms of the intensity of solar radiation and most of the land is predominantly desert. The adsorption system (Fig.  {\ref 2}) can be compared to a conventional air conditioner or refrigerator with electric powered mechanical compressor replaced by a thermally driven adsorption compressor. The ability to be driven by heat which is used for desorption, makes adsorption cycles attractive for electrical energy savers. Also since fixed adsorbent beds are usually employed these cycles can be operational without moving parts other than magnetic valves.\par
This results in low vibration mechanically simple high reliability and very long life time. The uses of fixed beds also results in intermittent cycle operation, with adsorbent beds changing between adsorption and desorption stages \hyperref[b8]{[8]}[9]. 
\section[{Fig. 2: Adsorption chiller (SJ-10AD)}]{Fig. 2: Adsorption chiller (SJ-10AD)}\par
To supply the energy for air conditioning and DHW was considered a system in which thermal energy is supplied through the use of Parabolic Trough solar Collectors (PTC) combined with an adsorption system (for cold production). For this, several approaches were made in what concerns the system sizing. These approaches consisted in sizing the system taking into account the energy required to meet the building energy needs, considering: monthly average area of collectors, average area of collectors in the heating period, average area of collectors in the cooling period and month in which is needed greater area of collectors. Another aspect to consider is that the installed collector power is equal to the power needed to satisfy the energy demand of the building. It is expected that total energy needs will not always be satisfied due to the fluctuation of the available solar energy along the day. 
\section[{a) Solar radiation}]{a) Solar radiation}\par
In Table \hyperref[tab_0]{1} are presented the solar radiation parameters for ELbrega city used for this study. These values were obtained from the atmospheric science data center maintained by NASA \hyperref[b9]{[10]}  The prices presented in the Table  {\ref 2} were obtained from the energy bills of the building. All prices used in this study are reported to 2010 \hyperref[b5]{[5]}.\par
For this study was selected a administrator building of Bright Star University. The building is composed by two floors with a total surface area of 1.450 m 2 . The building does not have any heating system.. The building is cooled using a Electrical Energy (EE). Due to the non-existence of system, it was considered that the cooling of the building is achieved by using an electrical compression chiller with a Coefficient Of Performance (COP) of 3.Table \hyperref[tab_2]{3} lists the heating and cooling periods taken into consideration for this study.  The thermal energy captured in the solar collectors is transferred to the internal circuit through a heat exchanger The backup will be assured by the existing hot water system (liquid/liquid). For DHW storage is used a thermal reservoir that shall come into operation when the solar collectors do not provide enough energy to satisfy the building energy demand. The system will alternate between the production of heat in the winter and cold in the summer, depending on the direction of the hot water circuit. The heating and cooling of the different indoor spaces will be done through heat exchangers (water/air) mounted in the air handling units of the building. To mitigate fluctuations in the supply of cold water, as well as to meet peak needs, the system has an inertia tank in the chilled water circuit. The operating principle diagram is presented in Fig.  {\ref 5}. 
\section[{Case Study}]{Case Study} 
\section[{Fig. 5: Operating principle diagram b) Energy needs of the building}]{Fig. 5: Operating principle diagram b) Energy needs of the building}\par
The heating and cooling needs presented in table \hyperref[tab_4]{4} were determined by using a Calculation equations for cooling and heating loads.   Table  {\ref 5} shows the monthly produced energy and the costs associated with the use of fossil fuels as backup. 
\section[{Table 5: Produced Energy}]{Table 5: Produced Energy}\par
Table  {\ref 5} shows the difference between the real value of subsidized cost kWh and the actual, loss and loss on the government the very high support rate 83,503dinars .Therefore, since the cost of the solar system to feed the building loads about 370,000 dinars, and compared to the value of the loss, the installation of the station means the possibility of restoring the value of the solar system in the first five years and then after 20 years free. 
\section[{d) Design the model}]{d) Design the model}\par
Table \hyperref[tab_5]{6} shows the design values of the solar system that we need to provide building loads  For this scenario is required a collecting surface area of 140 m 2 of PTCs (5 NepSolar PolyTrough 1200 solar modules) that result in 77 kW of installed power. For the cold production it was considered an adsorption system capable of delivering 48 kW of cooling power (SorTec adsorption Chillers). 
\section[{e) Economic analysis}]{e) Economic analysis}\par
For the economical analysis, was considered a system lifetime of 25 years. The analysis was carried out at constant prices (without considering the rate of inflation) it was considered a nominal discount rate of 3 \%; were not considered costs associated with the maintenance of the system and it was considered an annual cost of ? 2.692 with backup energy fossil fuels . The prices mentioned in table 7 refer to PTCs and to the adsorption system; and were obtained directly from their manufacturers \hyperref[b10]{[11]}. Solar water heating reduces the amount of water that must be heated by conventional waterheating system used in buildings, so it can directly substitute fossil-fuel energy for renewable energy, allowing at the same time a reduction in the energy bill, with the possibility of achieving a better energy label for the building. The use of PTC when combined with adsorption technology can be used for building air conditioning, enabling the production of heat and cold besides the production of DHW, with environmental benefits. The existing technology enables the use of these systems in small size applications (less than 100 kW), once there are available in the market small PTCs that can be roof mounted, and small power adsorption systems (less than 10 kW).\begin{figure}[htbp]
\noindent\textbf{1}\includegraphics[]{image-2.png}
\caption{\label{fig_0}Fig. 1 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{4}\includegraphics[]{image-3.png}
\caption{\label{fig_1}Fig. 4 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{6}\includegraphics[]{image-4.png}
\caption{\label{fig_2}Fig. 6 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{}\includegraphics[]{image-5.png}
\caption{\label{figure5}}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{1} \par 
\begin{longtable}{P{0.5972972972972973\textwidth}P{0.25270270270270273\textwidth}}
III.\tabcellsep Methodology\\
© 2021 Global Journals\tabcellsep \end{longtable} \par
  {\small\itshape [Note: Fig. 3: The average solar radiation of ELbrega city b) Energy costsThe considered energy costs are presented in]} 
\caption{\label{tab_0}Table 1 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{22} \par 
\begin{longtable}{P{0.5780000000000001\textwidth}P{0.102\textwidth}P{0.17\textwidth}}
Electrical Energy\tabcellsep 0.4\tabcellsep D/kWh\end{longtable} \par
 
\caption{\label{tab_1}table 2 .Table 2 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{3} \par 
\begin{longtable}{P{0.2087719298245614\textwidth}P{0.6412280701754386\textwidth}}
Heating\tabcellsep From November to March\\
Cooling\tabcellsep From April to October\end{longtable} \par
 
\caption{\label{tab_2}Table 3 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{} \par 
\begin{longtable}{P{0.11376262626262626\textwidth}P{0.13308080808080808\textwidth}P{0.15883838383838383\textwidth}P{0.2532828282828283\textwidth}P{0.19103535353535353\textwidth}}
\tabcellsep \tabcellsep \tabcellsep \tabcellsep Year 2021\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep 29\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep (A ) Volume Xx XI Issue I Version I\\
Month Jan Mar Apr May Jun Jul Feb\tabcellsep Heating [kWh] 27.300 6.0001 8.000 0 0 0 0\tabcellsep Cooling [kWh] 0 0 0 10.240 24.194 27.628 31.104\tabcellsep Total [kWh] 27.300 6.0001 8.000 10.240 24.194 27.628 31.104\tabcellsep Global Journal of Researches in Engineering\\
Aug\tabcellsep 0\tabcellsep 33.990\tabcellsep 33.990\tabcellsep \\
Sep\tabcellsep 0\tabcellsep 32.760\tabcellsep 32.760\tabcellsep \\
Oct\tabcellsep 0\tabcellsep 28.220\tabcellsep 28.220\tabcellsep \\
Nov\tabcellsep 12.000\tabcellsep 0\tabcellsep 12.000\tabcellsep \\
Dec\tabcellsep 23.400\tabcellsep 0\tabcellsep 23.400\tabcellsep \\
Total\tabcellsep 86.700\tabcellsep 188.136\tabcellsep 274.836\tabcellsep \\
\tabcellsep \tabcellsep \tabcellsep © 2021 Global Journals\tabcellsep \end{longtable} \par
 
\caption{\label{tab_3}}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{4} \par 
\begin{longtable}{}
\end{longtable} \par
 
\caption{\label{tab_4}Table 4 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{6} \par 
\begin{longtable}{P{0.08002092050209204\textwidth}P{0.003556485355648535\textwidth}P{0.003556485355648535\textwidth}P{0.1653765690376569\textwidth}P{0.0017782426778242676\textwidth}P{0.010669456066945606\textwidth}P{0.008891213389121338\textwidth}P{0.19027196652719666\textwidth}P{0.0017782426778242676\textwidth}P{0.0017782426778242676\textwidth}P{0.08535564853556485\textwidth}P{0.08535564853556485\textwidth}P{0.21161087866108788\textwidth}}
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep KW/h\\
12\tabcellsep 11\tabcellsep 10\tabcellsep 9\tabcellsep 8\tabcellsep 7\tabcellsep \multicolumn{2}{l}{6}\tabcellsep 5\tabcellsep 4\tabcellsep 3\tabcellsep 2\tabcellsep 1\\
\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{3}{l}{Month}\tabcellsep \tabcellsep \tabcellsep \tabcellsep \\
Month\tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{Energy [kWh] Produced}\tabcellsep \tabcellsep Cost\tabcellsep \multicolumn{2}{l}{Energy actual kWh) (0.4D\textbackslash }\tabcellsep \tabcellsep \multicolumn{2}{l}{Energy cost current (0.068D\textbackslash  kWh)}\tabcellsep Energy cost (0.332D\textbackslash  kWh) Paid by the government\\
Jan\tabcellsep \tabcellsep \tabcellsep 27.300\tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{10.920}\tabcellsep \tabcellsep \tabcellsep 1856\tabcellsep 9064\\
Feb\tabcellsep \tabcellsep \tabcellsep 6.0001\tabcellsep \tabcellsep \tabcellsep \tabcellsep 6.400\tabcellsep \tabcellsep \tabcellsep \tabcellsep 1088\tabcellsep 5312\\
Mar\tabcellsep \tabcellsep \tabcellsep 8.000\tabcellsep \tabcellsep \tabcellsep \tabcellsep 3.200\tabcellsep \tabcellsep \tabcellsep \tabcellsep 544\tabcellsep 2656\\
Apr\tabcellsep \tabcellsep \tabcellsep 10.240\tabcellsep \tabcellsep \tabcellsep \tabcellsep 4.096\tabcellsep \tabcellsep \tabcellsep \tabcellsep 696\tabcellsep 3400\\
May\tabcellsep \tabcellsep \tabcellsep 24.194\tabcellsep \tabcellsep \tabcellsep \tabcellsep 9.677\tabcellsep \tabcellsep \tabcellsep \tabcellsep 1645\tabcellsep 8032\\
Jun\tabcellsep \tabcellsep \tabcellsep 27.628\tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{11.051}\tabcellsep \tabcellsep \tabcellsep 1879\tabcellsep 9172\\
Jul\tabcellsep \tabcellsep \tabcellsep 31.104\tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{12.441}\tabcellsep \tabcellsep \tabcellsep 2115\tabcellsep 10326\\
Aug\tabcellsep \tabcellsep \tabcellsep 33.990\tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{13.596}\tabcellsep \tabcellsep \tabcellsep 2311\tabcellsep 11285\\
Sep\tabcellsep \tabcellsep \tabcellsep 32.760\tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{13.104}\tabcellsep \tabcellsep \tabcellsep 2228\tabcellsep 10876\\
Oct\tabcellsep \tabcellsep \tabcellsep 28.220\tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{11.288}\tabcellsep \tabcellsep \tabcellsep 1919\tabcellsep 9396\\
Nov\tabcellsep \tabcellsep \tabcellsep 12.000\tabcellsep \tabcellsep \tabcellsep \tabcellsep 4.800\tabcellsep \tabcellsep \tabcellsep \tabcellsep 816\tabcellsep 3984\\
Total\tabcellsep \tabcellsep \tabcellsep 23.400\tabcellsep \tabcellsep \tabcellsep \tabcellsep \multicolumn{2}{l}{100.573}\tabcellsep \tabcellsep \tabcellsep 17.097\tabcellsep 83503\end{longtable} \par
 
\caption{\label{tab_5}Table 6 :}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{7} \par 
\begin{longtable}{P{0.35522388059701493\textwidth}P{0.3805970149253731\textwidth}P{0.11417910447761194\textwidth}}
System\tabcellsep \multicolumn{2}{l}{Acquisition cost}\\
PTCs\tabcellsep 350,00\tabcellsep ?/m 2\\
Adsorption cooling\tabcellsep 1.250,00\tabcellsep ?/Kw\end{longtable} \par
 
\caption{\label{tab_6}Table 7 :}\end{figure}
 			\footnote{Year 2021 © 2021 Global Journals} 			\footnote{© 2021 Global Journals} 		 		\backmatter  			  				\begin{bibitemlist}{1}
\bibitem[Nasa et al.]{b9}\label{b9} 	 		\textit{},  		 			Surface Nasa 		,  		 			Solar Meteorology 		,  		 			Energy 		.  		 \url{http://eosweb.larc.nasa.gov/sse/}  		 	 
\bibitem[General Electricity Company of Libya ()]{b5}\label{b5} 	 	 	 		\textit{General Electricity Company of Libya},  				 (Tripoli, Libya)  		2010. 2010.  	 	 (GECOL Annual Report) 
\bibitem[Solair]{b3}\label{b3} 	 		\textit{increasing the market implementation of solar air-conditioning systems for small and medium applications in residential and commercial buildings},  		 			Solair 		.  		 \url{http://www.solair-}  		 	 
\bibitem[Wess and Rommel]{b7}\label{b7} 	 		\textit{Process Heat Collectors, state of the art within task 33/IV},  		 			W Wess 		,  		 			M Rommel 		.  		 	 
\bibitem[Kaygusuz ()]{b1}\label{b1} 	 		‘Prospect of concentrating solar power in Turkey: The sustainable future’.  		 			K Kaygusuz 		.  	 	 		\textit{Renewable and Sustainable Energy Reviews}  		2011. 15 p. .  	 
\bibitem[References Références Referencias Using Solar Energy to Build Air Conditioning -A Case Study of Libya Global Journal of Researches in Engineering (A ) Volume Xx XI Issue I Version I 31 Year 2021]{b0}\label{b0} 	 		\textit{References Références Referencias Using Solar Energy to Build Air Conditioning -A Case Study of Libya Global Journal of Researches in Engineering (A ) Volume Xx XI Issue I Version I 31 Year 2021},  		 	 
\bibitem[Desideri et al. ()]{b6}\label{b6} 	 		‘Solar-powered cooling systems: Technical and economic analysis on industrial refrigeration and air conditioning applications’.  		 			U Desideri 		,  		 			S Proietti 		,  		 			P Sdringola 		.  	 	 		\textit{Applied Energy}  		2009. Elsevier. 86 p. 1376.  	 
\bibitem[Saha et al. ()]{b8}\label{b8} 	 		‘Solar/waste heat driven twostage adsorption chiller’.  		 			B B Saha 		,  		 			A Akisawa 		,  		 			T Kashiwagi 		.  	 	 		\textit{Renew. Energy}  		2001. 23 p. .  	 
\bibitem[Bernardo ()]{b4}\label{b4} 	 		\textit{Solutions to Improve Building Energy Classification in Portugal},  		 			H Bernardo 		.  		2009. p. 2.  	 
\bibitem[Blair et al. ()]{b2}\label{b2} 	 		\textit{System Advisor Model},  		 			Dobos N A Blair 		,  		 			J Freeman 		,  		 			M Neises 		,  		 			Wagner 		.  		2014.  		 			National Renewable Energy Laboratory (NREL) 		 	 	 (SAM 2014.1.14: General Description) 
\bibitem[Quintal et al. (July)]{b10}\label{b10} 	 		\textit{Use of Parabolic Trough Solar Collectors for Building Air Conditioning and Domestic Hot Water Production -Case Study},  		 			E S Quintal 		,  		 			H S Bernardo 		,  		 			P G Amaral 		,  		 			L P Neves 		.  		July.  	 
\end{bibitemlist}
 			 		 	 
\end{document}
