## 3 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c} \hline \hline  & **Beja** & **Serpa** & **Mourão** & **Mertola** \\ \hline \multirow{2}{*}{Wheat} & 12 ORC & \multirow{2}{*}{204 boiler units} & \multirow{2}{*}{26 boiler units} & \multirow{2}{*}{0} \\  & cogeneration units & & & \\ \hline \multirow{2}{*}{Barley} & 0 & \multirow{2}{*}{144 boiler units} & \multirow{2}{*}{118 boiler units} & \multirow{2}{*}{0} \\ \hline \multirow{2}{*}{Out/lupin} & \multirow{2}{*}{101 boiler units} & \multirow{2}{*}{0} & \multirow{2}{*}{101 boiler units} & \multirow{2}{*}{21 ORC} \\  & & & & \\ \hline \multirow{2}{*}{
\begin{tabular}{c} Triticale/ \\ broad bean \\ \end{tabular} } & 12 ORC & \multirow{2}{*}{6 ORC} & \multirow{2}{*}{20 ORC} & \multirow{2}{*}{0} \\  & cogeneration units & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Units proposed for the combinations of cultivations and geographical areas. Figure 6: Proposed energy units for the combinations of plant cultivations and geographical areas: boiler units (**left**) and ORC cogeneration units (**right**). policies aiming to adequately support the decarbonization of the economy at national and regional levels. The policy interventions should be evenly focused on each component of cluster lifecycles, under a cradle-to-grave approach [1; 17; 21]. ORC degeneration is a promising technology traditionally applicable for geothermal applications, based on the conventional Rankine cycle with organic working fluids, instead of water, used as operational fluids with lower boiling and critical temperatures and critical pressure delivering a higher efficiency in power production [11; 13; 15]. These mild operative conditions allow for the production of electricity from a lower-temperature heat source with higher thermodynamic efficiency in a modular unit where the thermodynamic component with a simpler biomass combustion chamber. Financial feasibility is thereby improved by the employment of cheaper materials with lower maintenance costs. The lifetime of this equipment is 20 years with an electricity production cost of about 0.0275 \(\upmu\)kWhr\({}^{-1}\)[12]. The application of the ORC units in district heating, following a prevailing tendency in Europe, would allow for the local thermal agent to consume the cogenerated electricity produced. The use of automatic boilers for biomass combustion with energy efficiencies as high as 80% to 85% is sufficiently characterized for common use, and biomass has been proven as a competitive source of thermal energy by comparison with natural gas or electricity. The tendential replacement of fossil fuels by biomass renewable sources of energy is in this way facilitated. Neighborhood heating from a few to up to 70-80 homes are two possible modes of network heating through the employment of straw biomass boilers, according to the prevailing circumstances [17]. Farmers individually or within associations can invest in boilers on scales larger than what is necessary for their needs and deliver cheaply the excess heat to their neighbors. To the best of our knowledge, no other studies have been carried out about the utilization of straw biomass for bioenergy production through thermochemical conversion in Alentejo [7]. Two studies of local utilization of forest and agriculture biomass residues for bioenergy applications in the Alentejo municipalities of Marvao and Estremoz have been presented, clearly demonstrating the financial and environmental advantages of the replacement of diesel and fossil electricity systems into hotel and four school types, respectively [51; 52]. General studies exist on items such as densification or electricity production by use of agroforestry residues in large industrial units [53], energy recovery from olive pomace, a relevant biomass resource in Alentejo [53; 54], circularity of biomass resources [55], or about the biomass use for electricity production in general [56].