RESEARCH-312: Corrected figure number.

wiki/docs/virtual-heat-pump.md

@@ -20,7 +20,7 @@ The heat pump operation steps are the following:
 Unlike the heat pump model described above, district heating networks use water pipes that are directly connected to the building, and usually the supply temperature, return temperature and water flow rates are measured in order to facilitate customer billing. The virtual heat pump model can use these district heating measurements to calculate the heat demand of the building.  The heat demand is then provided as an input for the VHP model to calculate the energy that needs to be consumed by the heat pump in order to provide the heat demand, taking into account the flexibility that the water tank storage provides.
 
 
-A configuration of multiple water tanks is also supported, allowing the monitoring and analysis of the temperature of each individual water tank that is connected to the heat pump. Since multiple water tanks are generally installed to satisfy different sources of heat demand (e.g. space heating and domestic hot water),  modelling multiple water tanks provides further insights regarding the heat pump’s operational effectiveness to meet these different types of heat demand. In such a configuration, the heat exchangers between the condenser side of the heat pump and each water tank (#4 in Figure 1) are assumed to be identical and the heat generated by the heat pump is attributed proportionally to all water tanks, consequently increasing the temperature of each water tank based on its portion of the generated heat. Conversely, the heat demand is also proportionally split to all water tanks, decreasing the temperature of each water tank commensurately.
+A configuration of multiple water tanks is also supported, allowing the monitoring and analysis of the temperature of each individual water tank that is connected to the heat pump. Since multiple water tanks are generally installed to satisfy different sources of heat demand (e.g. space heating and domestic hot water),  modelling multiple water tanks provides further insights regarding the heat pump’s operational effectiveness to meet these different types of heat demand. In such a configuration, the heat exchangers between the condenser side of the heat pump and each water tank (#4 in Figure 2.29) are assumed to be identical and the heat generated by the heat pump is attributed proportionally to all water tanks, consequently increasing the temperature of each water tank based on its portion of the generated heat. Conversely, the heat demand is also proportionally split to all water tanks, decreasing the temperature of each water tank commensurately.