Abstract: A device may be connected to a power grid in order to perform beneficial functions for the end user and/or utility company such as backup power, power quality improvement, peak shaving of the electrical load, etc. The device may include energy storage devices, such as batteries, and intelligent hardware and software that control charging and discharging and that enable interactive communications.

Abstract: Mating an energy storage component and a power conversion and delivery component with computer intelligence and digital data communications hardware helps to effectively and efficiently monitor and react to the power demand profile at a location in an advanced manner without expensive industrial controls or human interaction. A local power source includes an energy storage component and a power conversion and delivery component, and delivers power to a load or a load group. The local power source is controlled by a control component including, for example, digital computer hardware and digital communications hardware. The control component is capable of monitoring power demand, detecting various stimuli, and triggering a reaction by the local power source to reduce peak demand.

Abstract: In the current invention, in order to increase efficiency of battery powered AC electricity supply, multiple inverter/battery modules are used in parallel but can be individually shut down. The number of inverters activated depends on the power usage. When only a little power is needed only one or a few inverters are activated. When more power is needed the battery inefficiency increases and more inverters will be activated.

Abstract: The current invention is a device connected to the power grid in order to perform beneficial functions for the end user and/or utility company such as backup power, power quality improvement, peak shaving of the electrical load, etc. Inside the device would be energy storage devices such as batteries, and intelligent hardware and software controlling charging, discharging and interactive communications.

Abstract: A burner for a rotary kiln consists of a central pipe (5) for introducing an oil or gas lance, a first concentric pipe (8) for introducing primary air and a second concentric pipe (1) for introducing a mixture of solid fuel and carrier air into the burning zone of the kiln. The pipes (5, 8 and 1) form mutually annular channels, the primary air channel being located inside the solid fuel/air channel and at its end facing the burning zone being provided with nozzles mounted parallel to the axis of the burner, the primary air streams from the nozzles drawing the particles of solid fuel towards the core of the flame in the burning zone to increase the combustion and to reduce the NO.sub.x -content in the kiln exhaust gases. The burner is provided with a heat exchanger (14, 18 and 20) surrounding the portion of the burner projecting into the kiln to cool the burner and to increase the primary air velocity during injection into the burning zone.