Nsk Corporation

Jgc Corporation

Masaki Ikeda

Hisao Tanaka

Kimio Inoue

Katuhiko Hamamura

Toshio Katou

Toshikazu Miyashita

Masao Wakimoto

Satoru Kanazawa

Provided is a method of designing a heat exchanger group being installed in a processing plant and having multiple ACHEs. In a first step, at least one design variable relating to ACHE design and the number of installed ACHEs are set as variable parameters, and a variable range and a change unit of each of the variable parameters are set. In a second step, a design value of the ACHE, which includes a value of a design variable non-selected as the variable parameter, is set. In a third step, Pareto solutions for at least two objective functions selected from an objective function group consisting of an installation length of the heat exchanger group, a total heat transfer area of heat transfer tubes, and total power consumption of fans are calculated by using a computer while the variable parameter are changed.

Method of designing heat exchanger group and processing plant

In order to provide an automatic figure drawing apparatus in which erroneous figure drawing can be prevented, neither a large-capacity magnetic disk nor a number of floppy disks is required, and management and operation can be performed easily by integrating a parametric system storing various CAD (Computer Aided Drafting) figures and an inventory control system. An automatic figure drawing apparatus provides a data selection device for selecting figure drawing data of an figure, on the basis of assignment data, from memory in which a data base of various dimensions of predetermined figure drawing subjects is built, and a figure drawing information production device for supplying figure drawing information of a parametric system to a figure drawing output device on the basis of the selected figure drawing data. Thereby, it is possible to prevent mistakes from being produced by a user selecting catalog data in a book.

Figure drawing apparatus and inventory purchasing system using the same

Growing community of inventors

Kanagawa, Japan

Masaki Ikeda