## 4 Conclusions
**Nomenclature**  
A Area, m\({}^{2}\)  
c\({}_{\rm p}\) Specific heat capacity, J/kgK  
COP\({}_{\rm cool}\) Cooling coefficient of performance  
COP\({}_{\rm heat}\) Heating coefficient of performance  
Exb\({}_{\rm b}\) Energy flow rate of the biomass heat rate, kW  
h Specific enthalpy, kJ/kg  
h\({}_{\rm in}\) Indoor heat convection coefficient, W/m\({}^{2}\)K  
h\({}_{\rm out}\) Outdoor heat convection coefficient, W/m\({}^{2}\)K  
HHV High heating value of the biomass, kJ/kg  
k Thermal conductivity, W/mK  
L Layer thickness, m  
m\({}_{\rm b}\) Biomass mass flow rate, kg/s  
m\({}_{\rm r}\) Refrigement mass flow rate, kg/s  
m\({}_{\rm s}\) Strong solution mass flow rate, kg/s  
m\({}_{\rm w}\) Weak solution mass flow rate, kg/s  
N Number of the layers in the examined structural element  
Q Heat rate, kW  
T Temperature, \({}^{\circ}\)C or K  
U Thermal transmittance, W/m\({}^{2}\)K  
X\({}_{\rm S}\) Strong solution concentration in LiBr, %  
X\({}_{\rm w}\) Weak solution concentration in LiBr, %  
**Greek Symbols**  
\({}^{\eta}\)boiler Boiler efficiency  
\({}^{\eta}\)len\({}_{\rm cool}\) Energy efficiency for cooling  
\({}^{\eta}\)len\({}_{\rm heat}\) Energy efficiency for heating  
\({}^{\eta}\)lex\({}_{\rm cool}\) Energy efficiency for cooling  
\({}^{\eta}\)lex\({}_{\rm heat}\) Energy efficiency for heating  
\({}^{\eta}\)HEX Effectiveness of the heat exchanger solution  
\(\rho\) Density, kg/m\({}^{3}\)  
**Subscripts**  
abs absorber  
am ambient  
am\({}_{\rm cr}\) ambient critical  
b biomass  
con condenser  
cool cooling  
evap  
evaporator  
fram  
gen generator  
glaz  
heat  
heating  
u useful  
window  
* [PERSON] and [PERSON] (2016) [PERSON]; [PERSON] [PERSON] Exergy analysis of a H2O-LiCl absorption refrigeration system with operating temperatures estimated through inverse analysis. _Energy Convers. Manag._**2016**, _110_, 436-447. [CrossRef]
* [PERSON] et al. (2018) [PERSON]; [PERSON]; [PERSON] Exergy approach for advancing sustainability of a biomass boiler. _Int. J. Exergy_**2018**, _27_, 62-80. [CrossRef]
* [PERSON] (2017) [PERSON]; [PERSON] [PERSON]; [PERSON] Energetic, Exergetic, Economic and Environmental (4E) analysis of a solar assisted refrigeration system for various operating scenarios. _Energy Convers. Manag._**2017**, _148_, 1055-1069. [CrossRef]
* Available online: [[https://tmsys.de/en/resources/faq/validation](https://tmsys.de/en/resources/faq/validation)]([https://tmsys.de/en/resources/faq/validation](https://tmsys.de/en/resources/faq/validation)) (accessed on 11 September 2022). * [PERSON] et al. (2019) [PERSON]; [PERSON]; [PERSON] [PERSON]; [PERSON] Numerical simulation of a solar cooling system with and without phase change materials in radiant walls of a building. _Energy Convers. Manag._**2019**, _188_, 40-53. [CrossRef]
* [PERSON] and [PERSON] (2017) [PERSON]; [PERSON] [PERSON] Energetic and financial analysis of solar cooling systems with single effect absorption chiller in various climates. _Appl. Therm. Eng._**2017**, _126_, 809-821. [CrossRef]
* [PERSON] and [PERSON] (2017) [PERSON]; [PERSON] Energetic and financial sustainability of solar assisted heat pump heating systems in Europe. _Sustain. Cities Soc._**2017**, _33_, 70-84. [CrossRef]
* [PERSON] et al. (2016) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Energetic and financial evaluation of a solar assisted heat pump heating system with other usual heating systems in Athens. _Appl. Therm. Eng._**2016**, _106_, 87-97. [CrossRef]
* [PERSON] et al. (2016) [PERSON]; [PERSON] [PERSON]; [PERSON] [PERSON]; [PERSON] _Comparison of Heating and Cooling Loads of a Typical Building with TRNSYS and eQUEST, Energy, Transportation and Global Warming_; Springer: New York, NY, USA, 2016; pp. 327-338. * Available online: [[https://www.dapeep.gr/](https://www.dapeep.gr/)]([https://www.dapeep.gr/](https://www.dapeep.gr/)) (accessed on 11 September 2022).