An air-conditioning controlling device includes an indicator calculating portion that calculates one or more indicators for evaluating, for each individual Pareto solution, similarity of the detail of air-conditioning control based on the operating volumes and/or the state distributions for the Pareto solution, a similarity calculating portion that calculates, for each Pareto solution, similarity of the Pareto solution to a reference Pareto solution, based on the indicators for the Pareto solution and the indicators for the reference Pareto solution, which is selected as a reference from the Pareto solutions, and an air-conditioning instructing portion that sends, to the air-conditioning system, the operating volumes of the Pareto solution with the least similarity to the reference Pareto solution from among the Pareto solutions belonging to the new air-conditioning controlling mode when there is a change, to a new air-conditioning controlling mode, of the air-conditioning controlling mode that is applied to the air-conditioned space.

Air-conditioning controlling device and method

Disclosed is a method for predicting the cooling load for efficient operation of a heat accumulation system by obtaining a prediction function regarding outdoor air temperature and specific humidity from meteorological office data, predicting the outdoor air temperature and specific humidity by using the prediction function and the highest and lowest temperatures of the weather forecast, and predicting the cooling load based on the sensible heat load coefficient, outdoor air coefficient, sensible heat load constant, and latent heat load constant, which are obtained from the building design data. The cooling load can be predicted without using a complicated mathematical model and with no reference to past operation data regarding the target building, but solely based on four air-conditioning design values of the building and the highest and lowest temperatures of the next day, which can be easily obtained from the weather forecast of the meteorological office.

Method for predicting cooling load

A logical expression indicating a logical relation between arbitrary two or three objective functions, of a plurality of mathematically approximated objective functions is computed. A feasible region/sensitivity information display unit displays the feasible region in arbitrary objective space according to it. An inverse image computation unit computes a point or area in design space corresponding to arbitrary design parameters in relation to a point or area specified by a user in the feasible region of the objective space. A feasible region/sensitivity information display unit displays the distribution state of the corresponding point or area as sensitivity information in relation to the specified point or area in the feasible region.

Multi-objective optimal design support device and method taking manufacturing variations into consideration

PROBLEM TO BE SOLVED: To shorten a thermal fluid simulation execution time for acquiring an air conditioning state to quickly analyze a situation. SOLUTION: This thermal fluid simulation analyzer generates an analysis model by the use of an analysis conditions when executing thermal fluid simulation analysis to the air conditioning state in a data center. The thermal fluid simulation analyzer executes the thermal fluid simulation analysis to the generated analysis model. Thereafter, the thermal fluid simulation analyzer collects analysis conditions at a time point when a prescribed time lapses after the prescribed time lapses from the execution of the thermal fluid simulation analysis. Next, the thermal fluid simulation analyzer extracts a boundary condition from the collected analysis conditions. Thereafter, the thermal fluid simulation analyzer specifies a region corresponding to the boundary condition from on the analysis model, changes the specified region by the boundary condition, and executes the thermal fluid simulation analysis to the changed analysis model. COPYRIGHT: (C)2011,JPO&INPIT

Thermal fluid simulation analyzer

Disclosed are a device and a method for controlling an air conditioner, wherein a thermal flow forward analysis processing unit (15B) uses a distribution system thermal flow analysis method to perform a forward analysis of the state of an air-conditioned space on the basis of space condition data (14A) and state data (14C) comprised of boundary condition data and heating element data, and calculates distribution data (14D) for indicating the temperature of the air-conditioned space and the distribution of air current; a setting data generation unit (15C) generates setting data (14F) comprised of the distribution data (14D) and target data (14E) for indicating the target temperature of a target area; a thermal flow inverse analysis processing unit (15D) uses the distribution system thermal flow analysis method to perform an inverse analysis of the temperature of the air-conditioned space and the distribution of air current on the basis of the setting data (14F), and back-calculates a new amount of an air conditioning operation comprised of the velocity and the temperature of new conditioning air at an air outlet; and an air-conditioning system (21) is controlled on the basis of the obtained new amount of air conditioning operation.

Device and method for controlling air conditioner

A highly convenient design support method and design support system for a heat convection field or a mass diffusion field which significantly reduce the number of times of numerical simulation required to examine the designing parameters for achieving the design purpose. The design support method includes a forward analysis step of analyzing the heat convection field or the mass diffusion field by solving an equation of the heat convection field or the mass diffusion field based on an initially set value of a designing parameter, an inverse analysis step of analyzing a sensitivity defined by a change ratio of the design purpose to a designing parameter change by solving an adjoint equation corresponding to the design purpose based on the set design purpose, and a sensitivity display step of displaying information on the sensitivity analyzed by inverse analysis step as a graphic image on the display device.

Design support method, design support system, and design support program for heat convection field

Provides a general-purpose, highly convenient design support method and design support system for a heat convection field or a mass diffusion field which significantly reduce the number of times of numerical simulation required to examine the designing parameters for achieving the design purpose. The design support method comprises forward analysis step S3 of analyzing the heat convection field or the mass diffusion field by solving an equation of the heat convection field or the mass diffusion field based on an initially set value of a designing parameter; inverse analysis step S6 of analyzing a sensitivity defined by a change ratio of the design purpose to a designing parameter change by solving an adjoint equation corresponding to the design purpose based on the set design purpose; and sensitivity display step S7 of displaying information on the sensitivity analyzed by inverse analysis step S6 as a graphic image on the display device.

Thermal convection field/substance diffusion field design supporting method, design supporting system, and design supporting program

Thermal management of industrial vehicles is severe due to heavy load and low traveling speed under operation. And amount of noise exposure tends to increase compared to passenger cars because the industrial vehicles often stay in an area for a long time. Speed-up of a cooling fan and enlarging open area on an engine compartment enhance cooling performance but noise exposure rises. Therefore means to satisfy both of the thermal management and the low noise are required in design of industrial vehicles. In this study, non-parametric sensitivity analysis has been applied to an engine compartment of an agricultural tractor to obtain sensitivity on design variables to coolant temperature. The non-parametric sensitivity analysis has brought in less computational load compared to conventional parametric approach regarding the engine compartment design.

An Approach to Thermal Management in Engine Compartments of Industrial Vehicles Using Non-Parametric Sensitivity Analysis

The adjoint variable method (AVM) is a method for solving inverse problems, and is used for sensitivity analysis. This paper reports on a study considering the effective usage of AVM, and examines how AVM could be applied to achieve optimal arrangement of trees for the purpose of reducing wind velocity around a station building. The following conclusions were obtained; Preferential arrangement plan of trees around Nobeoka station for the purpose of wind velocity reduction is calculated by AVM. The results showed that in the case of 10 trees with optimal placement, wind velocity would be reduced by 18% compared to wind velocity without trees. In contrast, in the case of 44 trees with all placement, wind velocity would be reduced by 29%. Even trees number is less than 1/4, the effect of 60 ~ 70% was obtained. These results confirmed the validity of the proposed method.

PROPOSAL OF DESIGN METHOD TO OPTIMAL ARRANGEMENT OF TREES FOR WIND VELOCITY REDUCTION:Study about utilizing reverse simulation for CFD using the adjoint variable method

To provide a cooling circuit design method which allows for easily producing a precise design of a cooling circuit that provides cooling effect.SOLUTION: A cooling circuit design method of the present invention relates to a method of designing a cooling circuit to be provided in a metal mold, and comprises steps of: obtaining sensitivity that acts as an improvement direction indicator for cooling circuit design parameters that provide a predetermined value of an objective function that is based on a design objective value; and designing a cooling circuit using the obtained design parameter sensitivity.SELECTED DRAWING: Figure 2

Kaoru Ikejima

Papers

Design support method, design support system, and design support program for heat convection field

Thermal convection field/substance diffusion field design supporting method, design supporting system, and design supporting program

An Approach to Thermal Management in Engine Compartments of Industrial Vehicles Using Non-Parametric Sensitivity Analysis

PROPOSAL OF DESIGN METHOD TO OPTIMAL ARRANGEMENT OF TREES FOR WIND VELOCITY REDUCTION:Study about utilizing reverse simulation for CFD using the adjoint variable method

Cooling circuit design method, program, and computer-readable recording medium