## 5 Integration of Sorption Systems On-board
### Feasibility Evaluation of Integrated Configurations
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Configuration** & \begin{tabular}{c} **Evaporation** \\ **Inlet Sorption** \\ \end{tabular} & \begin{tabular}{c} **Cooling Water** \\ **Inlet Sorption** \\ \end{tabular} & \begin{tabular}{c} **Evaporation Inlet** \\ **Compression** \\ \end{tabular} & \
\begin{tabular}{c} **Condenser** \\ **Compression** \\ \end{tabular} &
\begin{tabular}{c} **Heat Source** \\ **Sorption** \\ \end{tabular} \\ \hline Cascade (CAS) & 5 & seawater & \(-20\) & 0 & 90/200 \\ \hline Cascade with pre-conditioning (CAS-PRE) & 5 & seawater & \(-20\) & 0 & 90/200 \\ \hline Direct expansion & & & & \\ double effect (DIR-DOU) & \(-20\) & seawater & - & - & 200 \\ \hline Series hybrid (SER) & 5 & seawater & \(-2\) & seawater & 90/200 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Temperature levels for each configuration. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Configuration** & \
\begin{tabular}{c} **Sorption** \\ **System** \\ \end{tabular} & **COP** & **SCP (kW/kg)** &
\begin{tabular}{c} **Compression** \\ **Refrigerant** \\ \end{tabular} & **EER** \\ \hline \hline \multirow{4}{*}{_CAS_} & \multirow{4}{*}{AC/ethanol} & \multirow{4}{*}{0.06} & \multirow{4}{*}{75 (condenser} \\  & & & inlet = 15 \({}^{\circ}\)C), \\  & & & 50 (condenser \\  & & inlet = 22 \({}^{\circ}\)C), \\  & & & inlet = 22 \({}^{\circ}\)C), \\  & & & 35 (condenser \\  & & inlet = 30 \({}^{\circ}\)C) & \\ \hline \multirow{4}{*}{_CAS-PRE_} & \multirow{4}{*}{AC/ethanol} & \multirow{4}{*}{0.06} & \multirow{4}{*}{15} & \multirow{4}{*}{R744} \\  & & & & inlet = 22 \({}^{\circ}\)C), \\  & & & & 2.5 (condenser \\  & & & inlet = 30 \({}^{\circ}\)C) \\ \hline \multirow{4}{*}{_CAS-PRE_} & \multirow{4}{*}{AC/ethanol} & \multirow{4}{*}{0.06} & \multirow{4}{*}{15} & \multirow{4}{*}{R744} \\  & & & & inlet = 30 \({}^{\circ}\)C) \\ \hline \multirow{2}{*}{_SER_} & \multirow{2}{*}{AC/ethanol} & \multirow{2}{*}{0.08} & \multirow{2}{*}{R744} \\  & & & & R744 \\ \hline \multirow{2}{*}{_CAS_} & \multirow{2}{*}{CaCl2/ammonia} & \multirow{2}{*}{0.6} & \multirow{2}{*}{15} & \multirow{2}{*}{R744} \\  & & & & 2.5 (condenser \\  & & & & inlet = 30 \({}^{\circ}\)C) \\ \hline \multirow{2}{*}{_CAS-PRE_} & \multirow{2}{*}{CaCl2/ammonia} & \multirow{2}{*}{0.6} & \multirow{2}{*}{15} & \multirow{2}{*}{R744} \\  & & & & 3.2 (condenser \\  & & & inlet = 22 \({}^{\circ}\)C), \\  & & & & inlet = 30 \({}^{\circ}\)C) \\ \hline \multirow{2}{*}{_CAS-PRE_} & \multirow{2}{*}{CaCl2/ammonia} & \multirow{2}{*}{0.6} & \multirow{2}{*}{15} & \multirow{2}{*}{R744} \\  & & & & 3.2 (condenser \\  & & & inlet = 22 \({}^{\circ}\)C), \\  & & & & inlet = 30 \({}^{\circ}\)C) \\ \hline \multirow{2}{*}{_DIR-DOU_} & \multirow{2}{*}{CaCl2/ammonia} & \multirow{2}{*}{0.3} & \multirow{2}{*}{2} & \multirow{2}{*}{R744} \\  & & & & 2.5 (condenser \\  & & & inlet = 30 \({}^{\circ}\)C) \\ \hline \multirow{2}{*}{_SER_} & \multirow{2}{*}{CaCl2/ammonia} & \multirow{2}{*}{0.6} & \multirow{2}{*}{15} & \multirow{2}{*}{R744} \\  & & & & 2.5 (condenser \\  & & & & inlet = 30 \({}^{\circ}\)C) \\ \hline \end{tabular}
\end{table} 
Table 5: Performance of the sorption systems under the evaluated boundaries. Considering the outcome of this feasibility analysis, a more detailed energy and environmental analysis will be presented in the following section, based on some typical cases:  
* The use of the AC/ethanol system for fishing vessel A in the Indian Ocean (since this is the most critical condition, due to the higher temperature of the water) and in vessel C in the North Sea for series configuration;
* The use of the CaCl2/ammonia system for cascade configuration, for all vessels in the North Sea and Indian Ocean conditions. It is important to note that the activated carbon/ethanol prototype is the very first system presented in the literature of a sorption system with ethanol as refrigerant to work with continuous cooling effect.