Mitsubishi Electric Corporation

Mio Motodani

Shinji Nakamura

Mamoru Hamada

Takaya Yamamoto

Osamu Nakajima

Yoshitaka Uno

Kazuhiro Komatsu

Makoto Wada

Masae Sawada

Ryuta Tanaka

Toshisada Mariyama

Hiroyuki Waku

Hiroshi Maitani

Koki Nakane

Takahiro Hashikawa

Anna Sung

An air-conditioning apparatus control device that controls an air-conditioning apparatus and includes an airflow side model construction unit configured to construct an airflow side model, an equipment side model construction unit configured to construct an equipment side model, a coupled optimization execution unit having an objective function calculation unit that calculates a value of an objective function for the air-conditioned space and a sensitivity derivation unit that derives sensitivity, which is change in the objective function when a control variable is changed, and configured to calculate an optimum solution by optimizing the objective function based on the airflow side model and the objective function based on the equipment side model, and a control target value determination unit configured to determine a control target value for the air-conditioning apparatus from the optimum solution.

Air-conditioning apparatus control device

In a thermal load estimation device, a process in which a state estimating unit estimates a state amount indicating a state of a target area at an estimation target time by using measurement data obtained by measuring a state amount of the target area, air conditioner operation data indicating an operation state of an air conditioner disposed in the target area, and a thermal load of the target area estimated by a thermal load estimating unit, and a process in which the thermal load estimating unit estimates the thermal load of the target area by using the measurement data, the air conditioner operation data, and an estimation value of the state amount of the target area estimated by the state estimating unit are alternately performed, so that a thermal load likely to be the thermal load of the target area at the estimation target time is estimated.

Thermal load estimation device, air conditioning control system, and thermal load estimation method

A ventilator () includes: an air supply fan () to supply outdoor air to a room; an air exhaust fan () to exhaust indoor air, out of the room; and a total heat exchanger () which is made with partition boards () being moisture-permeable flat parts and with spacer boards () being corrugated parts, the partition boards and the spacer boards being alternately stacked, the total heat exchanger exchanging heat between the outdoor air and the indoor air; and thereby suppresses ice formation. The ventilator () includes: an indoor temperature sensor (); an indoor humidity sensor (); an outdoor temperature sensor (); and a control unit () to control operation of the air supply fan () and the air exhaust fan () on a basis of at least one state quantity estimated by substituting the indoor air temperature, the indoor air humidity, and the outdoor air temperature in a total heat exchanger model formula () representing characteristics of the total heat exchanger ().

Ventilator

Change of a set room temperature of an air-conditioning apparatus leads to change of electric power consumed by the air-conditioning apparatus, and in a case of cooling, the consumed electric power increases as the set room temperature decreases. Consequently, a user has been unable to freely change the set room temperature. Thus, when the set room temperature is changed by the user, an evaporating temperature (refrigerant temperature) at which the electric power consumed by the air-conditioning apparatus does not change before and after the change is estimated and the air-conditioning apparatus is commanded for the evaporating temperature, which allows the user to pursue indoor comfort without worrying about the electric power consumed by the air-conditioning apparatus.

Air-conditioning control device and air-conditioning control method

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

An air-conditioning system includes: a controller configured to: extract a lower limit load that occurs at a minimum, in a load that occurs in an air-conditioned space and that changes depending a time period; distribute a proportion at which the extracted lower limit load is to be processed, as a processing proportion stored in a memory; control each of air-conditioning apparatuses that are at a second place and subsequent places in apparatus rankings, such that the lower limit load is processed and distributed, and to control an air-conditioning apparatus that is at a first place in the apparatus rankings, such that a remaining load of the lower limit load and a fluctuating load that occurs over the lower limit load are processed.

Air-conditioning system

An air-conditioning system control apparatus including: a storage to store data for control of a ventilation apparatus and an air-conditioning apparatus; and a computing device to generate a control command controlling the ventilation and the air-conditioning apparatus based on the stored data. The computing unit includes: a ventilation air volume correction coefficient generator to generate a ventilation air volume correction coefficient for correcting a set ventilation air volume based on operation conditions and previous operation data of the ventilation and the air-conditioning apparatus; an operation state determination unit to correct the set ventilation air volume, obtained based on temporal fluctuation data of a carbon dioxide concentration and current operation data of the ventilation and the air-conditioning apparatus, with the ventilation air volume correction coefficient; and a control command generator to generate the control command based on the set ventilation air volume corrected by the operation state determination unit.

Air-conditioning system control apparatus and 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

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.

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Chiyoda-ku, Japan

Mio Motodani