Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Takaya Yamamoto

Hiroshi Maitani

Kazuhiro Komatsu

Yoshihiro Takahashi

Kiyoshi Maekawa

Koji Matsuzawa

Masashi Fujitsuka

Mio Motodani

Masashi Kitamura

Taro Hattori

Yoshitaka Uno

Masae Sawada

Osamu Nakajima

Takahiro Nakai

Motohiko Kawagishi

An air-conditioning control device for controlling an air-conditioning apparatus configured to perform air conditioning of a room in which a device that changes an amount of water vapor is located. The air-conditioning control device includes a condensation occurrence determiner configured to determine whether condensation occurs in the room after a certain amount of time elapses by using an amount of change in water vapor, which is predicted by collating device operation data with a device operation table, and an air-conditioning controller configured to change an operation state of the air-conditioning apparatus when the condensation occurrence determiner determines that condensation occurs.

Air-conditioning control device, air-conditioning apparatus, and air-conditioning system

An air-conditioning control evaluation apparatus includes a storage unit and a computing unit. The storage unit stores building information, input information, control information, a set of building models, and a candidate selection criterion. The computing unit determines an item available as input data for a building model, identifies the distribution of observed data, selects a plurality of candidate building models from the set of building models based on the available item and candidate selection criterion, estimates each parameter based on a method corresponding to the distribution, determines one building model based on a predetermined statistic calculated for the plurality of building models and the residual between estimated and observed values calculated for each of the building models, and evaluates, by use of the determined building model, energy saving and comfort for a plurality of controls to be evaluated.

Air-conditioning control evaluation apparatus, air-conditioning control evaluation method, and computer readable medium

A controller of an air-conditioning system includes a feedback control unit configured to generate a state quantity command from a control parameter and a difference between a target value of a room temperature and a measured room temperature and control the room temperature to the target value on the basis of the state quantity command, a control target heat characteristic model calculation unit configured to calculate a parameter of a model regarding a heat characteristic of a control target from at least a state quantity regarding an amount of heat supplied to the control target or the state quantity command, and the measured room temperature during normal operation, and a control parameter determination unit configured to determine the control parameter by using the parameter and a formula derived from the model regarding the heat characteristic of the control target.

Controller of air-conditioning system and method for controlling air-conditioning system

An indoor environment model creation device is configured to create an indoor environment model of an indoor space in which air-conditioning equipment configured to condition air, an indoor humidity sensor configured to measure an indoor humidity of the indoor space, and a COsensor configured to measure a COconcentration in the indoor space are installed. The indoor environment model includes a plurality of physics models in which heat, moisture, and COconcentration parameters are included. The indoor environment model creation device includes: a data storage unit configured to store operation data of the air-conditioning equipment in a learning target period as learning-use input data, and store measurement data measured by the COsensor and the humidity sensor; and a model parameter learning unit configured to comprehensively learn the plurality of physics models with use of the learning-use input data and the measurement data, which are stored in the data storage unit.

Indoor environment model creation device

An air-conditioning system controller controls one or plural air-conditioning apparatus installed in a building, and includes a processor that determines an air-conditioning apparatus control command so that a preset evaluation index satisfies a preset condition in a preset control-target period under a preset constraint. The processor divides the control-target period into time sections, determines a room-temperature change permissible range within which a room temperature satisfies the constraint, determines a heat-load change permissible range, based on the room temperature, the room-temperature change permissible range, a heat load estimation, and a heat load to be processed by each air-conditioning apparatus, and determines, for each time section, as the air-conditioning apparatus control command, an operation frequency and start-stop of the air-conditioning apparatus, based on the heat-load change permissible range and an operation efficiency of the air-conditioning apparatus.

Air-conditioning system control device and air-conditioning system control method

A consumer electric power control system includes a consumer data storage unit, a consumer daily data creation unit, an electric power instruction value acquisition unit, an electric power reduction scenario creation unit, a consumer data prediction unit, a condition change indicator calculation unit configured to calculate a plurality of condition change indicators for a plurality of electric power reduction scenarios, each of the plurality of condition change indicators representing a degree of difference in tendency between consumer prediction data and consumer daily data, an equipment operation determination unit configured to determine one of the plurality of electric power reduction scenarios based on the plurality of condition change indicators and determine an equipment operation pattern based on the determined one electric power reduction scenario; and an equipment operation control unit configured to control various types of equipment based on the determined equipment operation pattern.

Consumer electric power control system and consumer electric power control method

An air-conditioning system control apparatus capable of, even for a room in which a humidity sensor is not installed, accurately estimating an indoor humidity and preventing an indoor temperature and humidity from deviating from comfortable ranges. The air-conditioning system control apparatus includes a thermal characteristic parameter setting unit configured to determine a thermal characteristic parameter of a building thermal model based on a heat equation, a humidity characteristic parameter setting unit configured to determine a humidity characteristic parameter of a building humidity model based on a moisture balance equation in an air-conditioned space, and a control data generation unit configured to generate control data of an air-conditioning apparatus so that a temperature and a humidity of the air-conditioned space are each within a preset range.

Air-conditioning system control apparatus

A heat load predictor predicts a change over time of a heat amount to be processed by air-conditioning equipment, an operation plan creator previously creates an operation plan of the air-conditioning equipment to reduce an evaluation index under a first restrictive condition that a total process heat load be maintained at a same level or within a range of a predetermined amount of difference and a room temperature be maintained within a predetermined comfortable temperature range, and an operation plan corrector corrects the operation plan during controlling the air-conditioning equipment based on the operation plan. If an actually measured temperature differs from a predicted temperature predicted by the operation plan creator at the time of creating the operation plan, the operation plan creator predicts a change over time of the temperature in the room, and corrects the operation plan to minimize the evaluation index under the first restrictive condition.

Air-conditioning control system and air-conditioning control method

An operation plan correction unit is included which, after start of operation based on an operation plan, predicts a subsequent hot water supply load at a predetermined day on the basis of a hot water supply load result at the predetermined day, and changes a subsequent operation plan at the predetermined day generated by an operation plan generation unit, on the basis of the hot water supply load predicted again and a remaining amount of stored hot water in a hot water storage tank.

Hot water supply system

A method of analyzing heat and mass transfer in gas-liquid two-phase flow in an object transfer system includes dividing the object heat transfer system into a plurality of nodes, calculating a void fraction in a gaseous phase above a liquid surface of a node and calculating a void fraction in another node beneath the first node, and calculating a liquid surface level based on the results of the previous steps.

Growing community of inventors

Chiyoda-ku, Japan

Takaya Yamamoto