8results about How to "Reduce installed capacity" patented technology

The invention discloses a heat supply, cold supply and air compression equipment coupling control system and a control method thereof. The heat supply, cold supply and air compression equipment coupling control system comprises a heat energy recoverer; the hot water return side of the heat user is sequentially connected with the low-temperature side of the heat energy recoverer and the heat storage device and returns to the hot water inlet side of the heat user; the air compressor is connected with the high-temperature side of the heat energy recoverer to form a circulation loop; a water inlet on the hot water side of the combined cooling and heating unit is connected with the hot water return side of the heat user; a water outlet on the hot water side is connected to the high-temperature side of the heat energy recoverer; the cold user is connected with the chilled water side of the combined cooling and heating unit to form a circulation loop; the cold user is connected with a water chilling unit in parallel. The problems that energy consumption of an existing enterprise lacks effective integration, waste heat and waste energy are greatly wasted, and the energy cost is high are solved.

The application provides a multifunctional static synchronous compensator system, comprising: a plurality of three-phase converter valves, input ends of each three-phase converter valve being connected to a common DC bus; an energy storage valve, being connected in parallel with the three-phase converter valve, and the plurality of three-phase converter valves sharing the energy storage valve through the common DC bus; a switch breaker device, being arranged between the three-phase converter valve and the energy storage valve; and a control unit, being connected with the plurality of three-phase converter valves, the energy storage valve and the switch breaker device respectively. The application also provides a method for operating the multifunctional static synchronous compensator system. The multifunctional static synchronous compensator system provided by the application adopts back-to-back converter valves, shares energy storage elements through a common DC bus, and connects two AC buses to the two sides of the converter valve, so that the system can support the two AC power grids, greatly save the installation capacity of the energy storage elements in the energy storage valve, and provide power interconnection between the two AC power grids and play a role in tidal flow control.

The present invention discloses a double U-shaped heat-activated building envelope structure with a cross-drilled hole, characterized in that it includes a wall matrix, a plurality of double U-shaped heat exchange pipelines and a temperature monitoring system, a plurality of cross-shaped drilled holes are arranged inside the wall matrix, each heat exchange pipeline is composed of a first U-shaped tube, a second U-shaped tube and a heat exchange medium, wherein the first U-shaped tube is placed in a vertical drilled hole of the cross-shaped drilled hole, the second U-shaped tube is placed in a horizontal drilled hole of the cross-shaped drilled hole, and the first U-shaped tube and the second U-shaped tube are fixed at the four end positions of the cross-shaped drilled hole by special fixings and U-tube fixing rubber strips. The heat-activated building envelope structure of the present invention can effectively solve the heat accumulation phenomenon widely existing inside the traditional heat-activated building envelope structure without intermittent control of the heat-activated building system, thereby achieving a higher utilization rate of natural energy and effectively reducing the corresponding initial investment and operating costs of the source end and the pumping system.

The utility model provides a one-to-N time-sharing starting control circuit of a permanent magnet synchronous motor frequency converter, and belongs to the technical field of motor starting. The circuit comprises a main line and a control loop, a plurality of circuit breakers in the main line are connected with phase lines L1, L2 and L3 of a three-phase alternating current power supply respectively, the output end of a circuit breaker QF0 is connected with the input end of a frequency converter INV, and the output end of the frequency converter INV is connected with the input ends of normally open contacts of a plurality of first contactors respectively. Output ends of the plurality of circuit breakers are respectively connected with corresponding normally open contact input ends of the plurality of second contactors; normally open contact output ends of the plurality of first contactors are respectively connected with corresponding normally open contact output ends of the plurality of second contactors in parallel and then are respectively connected with input ends of the plurality of self-starting motors; in a control loop, coils of a plurality of relays are connected in parallel, and a TA terminal and a TB terminal of the frequency converter INV are connected in series in a coil loop of the relays TF1, TF2... TFn which are connected in parallel.

The invention provides a distributed photovoltaic and traction power supply collaborative voltage unbalance compensation method, which belongs to the technical field of distributed photovoltaic and traction power supply collaboration, and comprises the following steps: dividing a power grid into a plurality of sub-regions, and adopting a collaborative compensation strategy for each sub-region. Specifically, the method comprises the following steps: firstly, determining compensation power required to be output by a traction power supply system compensation device SVG and a photovoltaic field station in each sub-region so as to reduce the voltage unbalance degree; and then, an improved multi-agent consistency algorithm is adopted to optimize compensation power output of each photovoltaic converter in each photovoltaic station. On the basis, the negative-sequence current and the voltage unbalance degree of the common coupling point before and after compensation are calculated respectively, and the constraint condition of the voltage unbalance degree is obtained; and finally, taking the constraint condition as a reference, and determining the specific compensation power and compensation current of each photovoltaic converter by using an improved multi-agent consistency algorithm, thereby realizing the accurate compensation of the voltage unbalance degree of all common coupling points.

The invention discloses a fresh air handling unit and a control method thereof and a plant cleaning system.The fresh air handling unit comprises a surface cooling section, an air conditioning section and a control section, the reheating section is used for heating the air; the energy supply system comprises an evaporator and a condenser of the air conditioning system, the evaporator is arranged on the surface cooling section and used for providing cooling capacity for the surface cooling section, and the condenser is arranged on the reheating section and used for providing heat for the reheating section. The problems that in the prior art, the requirement for cold and heat of the low-temperature dehumidification section and the reheating section of a fresh air handling unit is high, and the energy consumption of the fresh air handling unit is high are solved, the energy consumption of fresh air treatment is reduced, and the energy efficiency of the fresh air handling unit is improved on the basis of guaranteeing the reliability of the fresh air handling unit.

This invention discloses a zero-energy building composite insulation board, comprising an outer insulation board, a first substrate, a second substrate, a flat heat pipe array, a heat source, and a flat heat pipe array tilt adjustment system. The second substrate is fixed to the outer insulation board. The flat heat pipe array tilt adjustment system controls the rotation angle of the parallel heat pipe array and is installed between the first and second substrates. The heat source is installed on either the first or second substrate, and the outer insulation board is fixed to the outside of the first substrate. This zero-energy building composite insulation board is less affected by the building construction stage, has a simple installation process, and is suitable for both new buildings and energy-saving renovations of existing buildings, showing great potential for application and promotion.

This invention provides an induction heating cluster device, relating to the field of induction heating technology, including an induction heating power supply, an induction heating device group, and a smart terminal. The induction heating power supply includes a DC power supply and a current inverter circuit. The current inverter circuit includes an inverter inductor L1, a current compensation capacitor C1, and a freewheeling diode Zk1. The inverter inductor L1 and the current compensation capacitor C1 are connected in series, then in parallel with the freewheeling diode Zk1, and finally connected to the output terminal of the DC power supply. The two poles of the current compensation capacitor C1 are the output terminals of the induction heating power supply. The induction heating device group includes 1 to M induction heating devices, which are connected in parallel to the output terminal of the induction heating power supply. Each induction heating device includes an induction heating main circuit and a control circuit. The control circuit is connected to the induction heating main circuit, and the smart terminal drives the control circuit to control the power of the induction heating main circuit, thereby achieving the goals of cost reduction, energy saving, and safe production.