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Model of Conceptual Design Phase and Its Applications in the Design of Mechanical Drive Units
Published in Cornelius Leondes, The Design of Manufacturing Systems, 2019
In the conceptual design phase, a design engineer is faced with the problem of designing a technical system which fulfills a need or executes a required function. The design engineer combines the elements and more complex building blocks into assemblies (i.e., technical systems) that fulfill the required function, which arises from a need. The required functions can be simple, and therefore require simple technical systems, or complex, and therefore require complex technical systems.19
Hidden overdesign in building services: insights from two UK hospital case studies
Published in Journal of Engineering Design, 2023
The first 10 interviews, Table 1 addressed general barriers to energy management. During these interviews it very quickly became clear that the new energy centre played an important role, and that this system was hugely oversized. Therefore, questions concerning the sizing of the boiler house were included in subsequent interviews. Interviews that raised issues about the sizing of the boiler system are marked in Table 1 with an asterisk (*). Gaps were addressed through follow-on interviews. It was not possible to interview the external designers of the boiler system. Instead, a Chartered building service design engineer was interviewed (CS2-P11) to better understand the processes and considerations associated with a typical boiler design. The Chartered Engineer had not worked at the RSUH but had worked on many similar design projects.
Recent 238Pu Production Activities at Idaho National Laboratory
Published in Nuclear Technology, 2022
Andrew Zillmer, William Green, Craig Tyler, Brian Gross, Erik Rosvall, Austen Fradeneck, Joshua Fishler, David Reeder, Ryan Marlow, Jagoda Urban-Klaehn, Michael Reichenberger, Mark Hill, Richard Howard
Qualifying experiments for irradiation in the ATR require the integration of various teams to create the appropriate models and analyses. This process begins with a neutronics analyst building a model (see Fig. 3c) that reflects the computer-aided design rendering developed by a design engineer. The expected ATR operational parameters used in the model must be assumed for the model to estimate the irradiation-induced heating, fission gas production within the target material, fission density within the target material, radionuclide inventory at reactor discharge, moderator temperature coefficient of reactivity for a range of water temperatures, and reactivity generated by the experiment at the beginning and end of irradiation since the ATR operational time and power varies from cycle to cycle. The assumed parameters are generally selected to bias the model in a more conservative (safer) manner because the model results yield derived parameters that demonstrate experiment compliance with the ATR safety analysis report (SAR). The Monte Carlo N Particle (MCNP) is the analysis tool used to perform these calculations. Material activation and depletion calculations are performed with the Oak Ridge Isotope Generation (ORIGEN) code and using MCNP-generated neutron flux and cross-section data as inputs.
The role of social ties in collaborative project networks: A tale of two construction cases
Published in Construction Management and Economics, 2021
Anna af Hällström, Petra Bosch-Sijtsema, León Poblete, Rasmus Rempling, Mats Karlsson
Our study’s scope includes the project network created by the three main roles involved in realizing the project: 1) the client whose needs the project will meet; 2) the design engineer, who develops the design; and 3) the contractor, who is responsible for the building process. We strive to answer the calls of Adami and Verschoore (2018) as well as Pryke et al. (2018) by broadening the understanding of the interplay between project networks and social ties. Our work also supports requests for additional research to underpin more collaborative project relationships (e.g. Walker and Rowlinson 2019). This study contributes by broadening the understanding of the relationship between project networks created in projects using CPDMs and social ties, as well as the nature of social ties in such networks.