To vary the capacity of an absorption plant, what should be regulated?

Regulating the flow of water to the condenser is vital for varying the capacity of an absorption plant because it influences the heat exchange process within the system. When the flow of water to the condenser is managed, it directly affects the temperature and pressure of the refrigerant that is being condensed. This control mechanism allows for the adjustment of the heat removal from the refrigerant during its phase change from vapor to liquid, thereby impacting the overall efficiency and capacity of the cooling system.

Increasing the flow of water can enhance the cooling effect, allowing the system to handle larger heat loads, while reducing the flow can decrease the cooling effectiveness. This dynamic interplay ensures that the absorption plant can operate effectively under varying climatic and load conditions while maintaining optimal performance. In contrast, manipulating the other options does not have the same direct and beneficial impact on the capacity of the absorption plant as controlling water flow to the condenser does.