## 4 Analysis and Discussion of Results
\begin{table}
\begin{tabular}{c c} \hline \hline
**Parameter** & **Value** \\ \hline Airflow (m\({}^{3}\)/h) & 3400 \\ Evaporator fan consumption (kW) & 0.315 \\ Condenser fan consumption (kW) & 0.188 \\ Individual Thermal Load (kW) & 9.58 \\ Condensing temperature (\({}^{\circ}\)C) & 41 (based on the 10 K air intake approach) [36]. \\ Evaporation temperature (\({}^{\circ}\)C) & 4.5 \\ Refrigerant gas & R-454-B \\ Refrigerant gas Charge (kg) & 2 \\ Gas superheating (\({}^{\circ}\)C) & 5 \\ Gas subcooling (\({}^{\circ}\)C) & 3 \\ Isentropic Efficiency. & 0.70 \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Features of AC equipment sizing. because these are smaller pieces of equipment and a return temperature of 15 \({}^{\circ}\)C of the refrigerant gas can lead to excessive overheating of the compressor oil. The air inlet temperature used in the condenser was 31 \({}^{\circ}\)C, close to the worst situation of field measurements to compare similar conditions in terms of the COP. To compare the cost of energy between the systems, the already mentioned 16.7% reduction in the psychrometric conditions was applied to the thermal load of 4725 kW in the period of 21 days, resulting in a value of 3935.9 kW. Using the new COP value of 3.495, the new air conditioning energy consumption will be 1126.15 kW. Recalculating the TEWI using the same methodology of 12 cycles of 21 days per year for a period of 10 years (10-year value is based on ASHRAE Equipment Life Expectancy chart for self-contained machines) [46] and with the refrigerant gas R-454 B, the results shown in Figure 5 were obtained. In general, there were reductions in energy consumption, water replacement, and environmental impact, as shown in Figure 6.  
Under the new conditions, the total AC energy consumption in a 21-day cycle for 2200 kg was reduced from 1575 kWh to 1126.15 kWh, that is, a reduction of around 30%. Additionally, a reduction in replacement water in the same order (around 30%) was obtained. In contrast, the reduction in the TEWI index was from 18,219 to 5325, that is, a reduction of 70%. In addition to the TEWI, there is the TWI (Total Water Impact) index, which sums up the impacts of direct and indirect water consumption in an AC system (in water-cooled and/or air-cooled condenser systems) and is possible to calculate for mushrooms. The TWIM index (total impact of water for air conditioning systems in mushroom) is the sum of  
Figure 5: TEWI with the methodology of 12 cycles of 21 days. Figure 6: Consumption reduction. the water needed to replace the air conditioning (from dehumidification) and the indirect water arising, for example, from the evaporation of water in the hydroelectric reservoirs, in this case using the value of 0.011071 m\({}^{3}\)/kWh (indirect water from the energy source in Brazil per kWh). Direct and indirect water consumption in the existing system would be the sum of 4372 L per cycle added to 17,430 L, together generating 21,802 L per 21-day cycle. The proposed system would add up to 15,575 L of water, so each cycle would save 6227 L in the AC alone, that is, 2.83 L of savings per kg of mushroom. In this context, studies have been developed to conduct life cycle assessments along the production chain (from pre-farm to on-farm to post-farm) to quantify the environmental impacts of the food production system, to find the most impactful processes or procedures, and to simultaneously assess the advantages and disadvantages of circular economy procedures. It was also found the mushrooms have significant GHG emissions during pre-farm operations. The results of this study showed that the mushroom production systems have a GWP impact ranging from 2.13 to 2.95 kg CO\({}_{2e}\)/kg. The most impactful input is from the climate control due to the amount of energy (from electricity and/or fossil fuels) required to power the system, which runs continuously. In addition to energy consumption, compost materials, compost emissions, and transportation also have some contribution to the environmental impact [55, 56, 57, 58, 59].