Viessmann Climate Solutions

A composite device (1001) of an HVAC system is provided. The composite device includes a heat pump assembly (1010), an electricity storage system (1020) and a DC bus (1030) to which the heat pump assembly (1010) and the electricity storage system (1020) are connected.

An air conditioning system includes a vapor compression loop (704) including a compressor (710), an expansion device (714), a first heat exchanger (712), a second heat exchanger (716), wherein a working fluid (R) is configured to circulate within the vapor compression loop (704). An energy storage device (702) is selectively operable to supply power to a component of the air conditioning system. A thermal management system (730) includes a heat transfer fluid loop (732) fluidly connecting the energy storage device (702) and a coolant heat exchanger (734). A heat transfer fluid is configured to circulate through the heat transfer fluid loop (732). The thermal management system (730) is thermally and fluidly coupled to the vapor compression loop (704) at the coolant heat exchanger (734). The coolant heat exchanger (734) is arranged in series with each of the compressor (710), the expansion device (714), the first heat exchanger (712), and the second heat exchanger (716) within the vapor compression loop (704).

A method of allocating power sources in an air conditioning system (100) includes determining (902) a load demand of the air conditioning system; determining (904) whether a demand response, DR, event or a time-of-use, ToU, high rate is occurring; in response to the DR event or ToU high rate not occurring, charging (906) an energy storage device (240) to an upper voltage, the charging performed at a predefined charging power level during a predefined charging period; in response to the DR event or ToU high rate occurring, determining (908) an allocation of power sources to satisfy the load demand and discharging the energy storage device (240) at a predefined discharging power level and a predefined discharging time period until the energy storage device (240) reaches a lower voltage level or the DR event or ToU high rate is finished.

A method of operating an air conditioning system (100) includes predicting (1002) power consumption of the air conditioning system (100) during an upcoming demand period; measuring (1004) a storage state of an electrical energy storage device (240) and a storage state of a thermal buffer (802); determining if a combined electrical energy from the electrical energy storage device (240) and thermal energy from the thermal buffer (802) is sufficient to fulfill the predicted power consumption of the air conditioning system (100) for the upcoming demand period; in response to the combined electrical energy from the electrical energy storage device (240) and thermal energy from the thermal buffer (802) being insufficient to fulfill the predicted power consumption of the air conditioning system (100) for the upcoming demand period, starting (1010) a preloading phase; wherein the preloading phase includes at least one of (i) charging the electrical energy storage device (240) or (ii) heating or cooling the thermal buffer (802) using the air conditioning system (100).

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