35results about How to "Guaranteed energy-saving operation" patented technology

The invention discloses an intelligent fresh air control device, which relates to a fresh air conditioning device of an air conditioning system. The intelligent fresh air control device mainly comprises a temperature humidity sensor, a carbon dioxide concentration sensor, a computer controller, an electrically operated valve and the like. The intelligent fresh air control device has the characteristics of intelligent control, convenient use, accurate control, energy-saving operation, small volume and low cost. And the intelligent fresh air control device also has the characteristics of improving the indoor air quality and meeting requirements of people for the indoor comfort and health. The intelligent fresh air control device can be widely applied to the air conditioning systems of various buildings such as residences, hotels, public buildings and the like and is the fresh air device which is controlled intelligently and saves energy.

The invention discloses an air conditioning system startup and shutdown control device based on an indoor heat comfort state and a control method. The device comprises an indoor data acquisition device, an outdoor data acquisition device, a computation controller and an electric valve. The indoor data acquisition device and the outdoor data acquisition device respectively comprise a temperature sensor, a humidity sensor, a black-bulb temperature sensor and a wind speed sensor, are respectively connected with a data inlet end of the computation controller, and form linkage control together with the electric valve. The computation controller is loaded with an adaptive predicted mean vote computation and comparison program. The electric valve is connected with the computation controller through a data connecting line and is connected with an original air condition system control box through a conducting wire. The control method of the device disclosed by the invention comprises the steps of comparing with an adaptive predicted mean vote obtained by the computation controller, giving out, by the computation controller, an action instruction to the electric valve, and then controlling the startup and shutdown of an indoor air conditioning system and the turning-on and turning-off of the indoor data acquisition device and the outdoor data acquisition device.

The invention discloses an air conditioner control method, a device and a computer storage medium, which belong to the technical field of intelligent household appliances. The air conditioner controlmethod comprises the following processes: when the compressor of the air conditioner operating in the cooling mode is stopped and the operation is stopped, the first temperature difference between thecurrent ambient temperature and the set temperature in the area of the air conditioner is smaller than the first set temperature value, determining a compensation set temperature greater than the settemperature according to a preset compensation strategy; Controlling the compressor to start operation when the second temperature difference between the current ambient temperature and the compensation set temperature is greater than the first set temperature value. Therefore, when the air conditioner is positioned in the room or the area, the heat loss of the room or the area is small, the temperature compensation can be carried out on the comparison, the time for stopping the operation of the compressor can be prolonged, the frequent start-stop of the compressor in the heat preservation space can be avoided, the energy-saving operation of the air conditioner is ensured, and the air conditioner is also protected.

The invention discloses a method for designing sliding pressure curve for a thermal power generating unit on the basis of coordinated control quality. Due to coupling of a coordinated control system, fast and accurate dynamic following is hard to achieve for conventional sliding pressure curve designs and control methods, and AGC (automatic generation control) is poor in operation quality. The method is characterized by including: firstly, designing a shape of the ideal intelligent sliding pressure curve according to the requirement of the thermal power generating unit for coordinated control; and secondly, performing segmental design, including a reference segment, an initial compensation segment and a final compensation segment, according to the ideal shape of the intelligent sliding pressure curve, adding intelligent judgment rules to each segment, performing variable parameter adjustment to allow for constant dynamic adjustment in the whole load variation process, and thereby guaranteeing quality in coordinated control of the thermal power generating unit. By applying the method, energy-saving operation of the thermal power generating unit is guaranteed, quality in coordinate control of the thermal power generating unit is guaranteed, fluctuation range of a closed-loop control circuit is greatly reduced and stability of the thermal power generating unit is enhanced.

The invention discloses a steam temperature observation optimal control method for a supercritical unit. At present, as a point measuring position is excessively near a desuperheating water valve in steam temperature control systems of most of units, an ideal control effect cannot be achieved on introduced advancing steam temperature, and the effect of controlling outlet steam temperature is poorer by using single-stage proportion integration differentiation (PID). The technical scheme adopted by the invention is that a state observation system is introduced into an outlet steam temperature control system to form an outlet steam temperature observation optimal control system. The dynamic procedure of the outlet steam temperature is fit by the state observation system by adopting a mathematical model, and the control is performed through an analog advancing signal and an advancing observation signal. Meanwhile, the steady state and the zero deflection of the outlet steam temperature observation optimal control system are ensured by adopting a static error eliminating system. The mathematical model, the state fitting, the state feedback factor and the control feedback factor of the outlet steam temperature are determined according to the characteristic of the supercritical unit. According to the steam temperature observation optimal control method for the supercritical unit, energy-saving operation of the unit is ensured; the fluctuation range of the outlet steam temperature is greatly reduced when the unit is in an automatic gain control (AGC) state; and the stability of the unit is enhanced.

The invention discloses a method of controlling emission of dry dedusting of a converter. The method comprises an initial blowing stage, an early blowing stage, a middle blowing stage and a later blowing stage, specifically, in the initial blowing stage, fixedly controlling the opening of a water regulating valve of an evaporative cooler to 15-18% in the beginning 14-16 S of blowing, and controlling the flow of the evaporative cooler at 18-22 m<3>/h; after blowing for 14-16 S, by taking the outlet temperature of the evaporative cooler as a control target for controlling an EVC water distribution curve, adjusting the control target according to the environment temperature; in summer, the outlet temperature target value of the evaporative cooler is 250-260 DEG C, and in winter, the outlet temperature target value of the evaporative cooler is 310-320 DEG C; and the outlet temperature target values of the evaporative cooler in spring and autumn are 280-290 DEG C. By integrally controlling a primary dust collecting fan, EVC water distribution, top blowing of oxygen and nitrogen, on the premise of guaranteeing standard discharge of a diffusing tower, stable and reliable energy-saving operations of dry method dedusting equipment are guaranteed, so that the method is suitable for being popularized and applied in various iron and steel enterprises.

The invention discloses a water temperature control method for a heat pump water heating machine. The water temperature control method comprises the following steps of obtaining default set water temperature of the heat pump water heating machine, determining working functions of the heat pump water heating machine and relevant parameters in the working functions of the heat pump water heating machine; calculating target water temperature through the working functions according to the default set water temperature and the relevant parameters; controlling the heat pump water heating machine and the target water temperature to perform work. By means of the water temperature control method, the target water temperature can be automatically adjusted to ensure water comfort degree of a user and operation energy-saving performance of the whole machine, convenience is brought to the user, and user experience is improved. The invention further discloses a water temperature control device for the heat pump water heating machine and the heat pump water heating machine.

The invention discloses a large temperature difference centralized heating system using power plant waste heat and a work method. A two-stage water-water heat exchanger and a two-stage power drive heat pump unit are arranged in a two-stage net heat exchange station, a circular cooling water waste heat recycling heat exchanger, a circular cooling water waste heat recycling electric heat pump unit,steam-water heat exchanger and a water-water heat exchanger are arranged in a first-stage pipe network heat exchange station, on the premise of ensuring the secondary network normal water supply temperature, water supply temperature of a primary heat network can be greatly reduced, steam consumption of a heat supply system is greatly reduced, and the use proportion of thermal power plant circularwater waste heat is greatly improved. Meanwhile, it is ensured that a secondary pipe network has the normal water supply temperature and water supply and returning temperature difference, the water supply temperature of the primary heat network is reduced to 80 DEG C, the water supply temperature of a secondary pipe network reaches about 70 DEG C, and the normal running flow of the secondary pipenetwork and energy-saving running of the circular water pump are ensured.

The invention discloses an energy-saving quick-start aerobic granular sludge reactor. The reactor comprises a reactor outer cylinder, the bottom of the reactor outer cylinder is provided with a conical sludge storage hopper, a microporous aeration device is arranged at the bottom of the conical sludge storage hopper and is connected with an external gas flow meter and an air compressor through aeration pipes, the conical sludge storage hopper is further connected with a water inlet pipe, the water inlet pipe is connected to a water inlet pump outside the reactor, the reactor outer cylinder is connected with a drainage pipe, drainage of the reactor is controlled by a water outlet control valve on the drainage pipe, and a multi-stage conical hydraulic circulating cover is arranged in the reactor outer cylinder. Multi-stage circulation of mixed liquid under different mixing strength conditions is achieved in the reactor with a small height diameter (smaller than 2), power consumption for operation of the aerobic granular sludge reactor and reactor height limitation are reduced, and operation and building cost of the aerobic granular sludge reactor is reduced.

The invention discloses a novel energy-saving elevator system and a constant power operation control method. The novel energy-saving elevator system comprises an elevator car, a counterweight box, a variable counterweight block device, a connecting chain, a variable speed driving device and a control system, wherein a weighing device is arranged on the elevator car, and the variable counterweightblock device is located at the top of an elevator shaft; the variable driving device comprises a traction motor and a transmission connected with the traction motor in a transmission mode, and an output shaft of the transmission is connected with a traction wheel in a transmission mode; and the connecting chain bypasses the traction wheel in the variable speed driving device, and the two sides ofthe connecting chain are correspondingly connected with the elevator car and the counterweight box. According to the novel energy-saving elevator system, the weight and the transmission variable speedratio of the counterweight box can be simultaneously changed, thus the output torque of a traction machine is indirectly adjusted, the output power of the traction motor is basically kept near the rated power, the performance of the motor is optimized, the unnecessary loss is reduced, and finally the effect of reducing energy consumption of the elevator is achieved.