Champs-Multizone and Virtual Building for Integrated Building Systems Design and Performance Evaluation

The ultimate goal of this research was to develop an integrated framework that facilitates performance-based multi-stage design of buildings and comparison between the performance predicted at the design stage and that monitored at operation stage. Such an integrated framework would not only enable design optimization, but also enable confirmation of design intent or diagnosis of performance deficiency, and thus provide feedbacks for future building design. This dissertation study represents the first step toward this ultimate goal, and had the following specific objectives:: 1) developing a combined heat, air, moisture and pollutant transport model for whole building performance simulation; 2) developing a real-time building IEQ and energy performance monitoring system using a Virtual Building structure to facilitate fast comparison between design and montored performance.; 3) developing a methodology to use CHAMPS-Multizone for a green building design throughout its initial and final design stage. The CHAMPS-Multizone model consists of building envelope model, room model, HVAC model and airflow model, and has an efficient and accurate numeric solvers. The model is tested under different building cases including ASHRAE 140 standard test and a three zones building test and comparision with EnergyPlus calculation results. The Virtual Building is a digital representation of the physical building with a hierarchical data structure, containing both static data such as enclosure assemblies, internal layout, etc. and dynamic data such as occupant activity schedule, outdoor weather conditions, indoor environmental parameters, HVAC operation data and energy consumption data. Then, the Virtual Building approach has been demonstrated in a LEED office building with its monitoring system. Finally, a multi-stage design process was formulated that considers the impact of climate and site, form and massing, external enclosure, internal configuration and environmental system on the whole building performance as simulated by CHAMPS-Multizone. Using the testbed building, both simulation results were also compared with the results monitored by the Virtual Building monitoring system. Future research includes refining CHAMPS-Multizone simulation capability and adding modules such as water loop calculation and integrating HVAC calculation with EnergyPlus

Research reports: 1990 NASA/ASEE Summer Faculty Fellowship Program

Reports on the research projects performed under the NASA/ASEE Summer Faculty Fellowship Program are presented. The program was conducted by The University of Alabama and MSFC during the period from June 4, 1990 through August 10, 1990. Some of the topics covered include: (1) Space Shuttles; (2) Space Station Freedom; (3) information systems; (4) materials and processes; (4) Space Shuttle main engine; (5) aerospace sciences; (6) mathematical models; (7) mission operations; (8) systems analysis and integration; (9) systems control; (10) structures and dynamics; (11) aerospace safety; and (12) remote sensin

Proceedings of the COST Action TU1403 : Adaptive Facades Network Final Conference

info:eu-repo/semantics/publishedVersio

Product Design

Product design is a comprehensive process related to the creation of new products, and the ability to design and develop efficient products are key to success in today’s dynamic global market. Written by experts in the field, this book provides a comprehensive overview of the product design process and its applications in various fields, particularly engineering. Over seven chapters, the authors explore such topics as development of new product design methodologies, implementation of effective methods for integrated products, development of more visualized environments for task-based conceptual design methods, and development of engineering design tools based on 3D photogrammetry, among others

COBE's search for structure in the Big Bang

The launch of Cosmic Background Explorer (COBE) and the definition of Earth Observing System (EOS) are two of the major events at NASA-Goddard. The three experiments contained in COBE (Differential Microwave Radiometer (DMR), Far Infrared Absolute Spectrophotometer (FIRAS), and Diffuse Infrared Background Experiment (DIRBE)) are very important in measuring the big bang. DMR measures the isotropy of the cosmic background (direction of the radiation). FIRAS looks at the spectrum over the whole sky, searching for deviations, and DIRBE operates in the infrared part of the spectrum gathering evidence of the earliest galaxy formation. By special techniques, the radiation coming from the solar system will be distinguished from that of extragalactic origin. Unique graphics will be used to represent the temperature of the emitting material. A cosmic event will be modeled of such importance that it will affect cosmological theory for generations to come. EOS will monitor changes in the Earth's geophysics during a whole solar color cycle

Unified modelling of aerospace systems: a bond graph approach

Systems Integration is widely accepted as the basis for improving the efficiency and performance of many engineering products. The aim is to build a unified optimised system not a collection of subsystems that are combined in some ad hoc manner. This moves traditional design boundaries and, in so doing, enables a structured evolution from an integrated system concept to an integrated system product. It is recognised that the inherent complexity cannot be handled effectively without mathematical modelling. The problem is not so much the large number of components but rather the very large number of functional interfaces that result. The costs involved are high and, if the claims of improved efficiency and performance are to be affordable (or even achievable), predictive modelling and analysis will play a major role in reducing risk. A modelling framework is required which can support integrated system development from concept through to certification. This means building a 'system' inside a computer and demonstrating the feasibility of an entire development cycle. The objective is to provide complete coverage of system functionality so as to gain confidence in the design before becoming locked into a full development programme with associated capital investment and contractual arrangements. With these points in mind the purpose of this thesis is threefold. First, to demonstrate the application of bond graphs as a unified modelling framework for aerospace systems. Second, to review the main principles involved with the modelling of engineering systems and to justify the selection of the bond graph notation as a suitable means of representing the power flow (i.e. the dynamics) of physical systems. Third, to present an exposition of the bond graph method and to evolve it into a versatile notation for integrated systems. The originality of the work is based on the recognition that systems integration is a relatively new field of interest without a mature body of academic literature or reported research. Apparently, there is no open literature on the modelling of complete air vehicles plus their embedded vehicle systems which deals with issues of integrated dynamics and control. To this end, bond graph concepts need to be developed and extended in new direction in order to facilitate an intuitive approach to the modelling of integrated systems

Climate-responsive design:

In climate-responsive design the building becomes an intermediary in its own energy housekeeping, forming a link between the harvest of climate resources and low energy provision of comfort. Essential here is the employment of climate-responsive building elements, defined as structural and architectural elements in which the energy infrastructure is far-reaching integrated. This thesis presents the results of research conducted on what knowledge is needed in the early stages of the design process and how to transfer and transform that knowledge to the field of the architect in order for them to successfully implement the principles of climate-responsive design. The derived content, form and functional requirements provide the framework for a design decision support tool. These requirements were incorporated into a concept tool that has been presented to architects in the field, in order to gain their feedback. Climate-responsive design makes the complex task of designing even more complex. Architects are helped when sufficient information on the basics of climate-responsive design and its implications are provided as informative support during decision making in the early design stages of analysis and energy concept development. This informative support on climate-responsive design should address to different design styles in order to be useful to any type of architects. What is defined as comfortable has far-reaching implications for the way buildings are designed and how they operate. This in turn gives an indication of the energy used for maintaining a comfortable indoor environment. Comfort is not a strict situation, but subjective. Diversity is appreciated and comfort is improved when users have the ability to exert influence on their environment. Historically, the provision of comfort has led to the adoption of mechanical climate control systems that operate in many cases indifferent from the building space and mass and its environment. Climate-responsive design restores the context of local climate and environment as a design parameter. Many spatial, functional and comfort-related boundary conditions that have an effect on the energy design concept have been distinguished. There are many low-graded energy sources that can be put to use in the built environment, with local climate as the primary component. When exploring the potential of local climate, urban context needs to be taken into account since it heavily affects the actual potential. Since buildings are typically build to last for decades, consideration of changing climate and its expected effect on the energy potential is an important factor in the strategy to follow. The study of the energy potential of local climate resulted in a set of climate-related and context-related boundary conditions. The principles of climate-responsive design - the conceptual relations between energy source, energy treatment and comfort demand - can be translated into various design solutions, the contextual, architectural and technical implementation of these principles into an actual design. The design solutions can be divided into six categories- site planning, building form and layout, skin, structure, finish and (integrated)building service - that cover various dimensions in planning and construction. In this thesis a non-exhaustive list of design principles and solutions is presented using different matrices. In order to design using climate-responsive design principles the architect should be given an overview of the comfort contribution and energy performance of design solutions. Furthermore, the identification of collaborations and conflicts when using multiple design principles together is essential. The generation of a satisfying design is more than just stacking solutions upon each other. It should also be made clear what a possible energy function of a building element is besides its primary function. This is where comfort and energy related design objectives of climate-responsive design meet other objectives (i.e. spatial, functional and structural). Finally, the impact of climatere sponsive building elements on the appearance of design is relevant to concept orientated architects. Together this can be considered as the content requirements of the design-decision support tool. In the early stages of the design process climate-responsive design is about the generation of energy concepts. In this phase accessible guidelines and the option to compare alternatives is more important than to assess absolute performance. The conceptual design phase is dynamic and has many iterations. Informative, context specific knowledge reduces the number of iterations before the architect has generated a satisfying number of design options from which it can continue to the next design phase of assessment. Functional requirements for the framework of the design decision support tool are the inclusion of a knowledge base with expert knowledge and best practice examples, the provision of informative, context-specific knowledge, the provision of accessible guidelines, the provision of an option to compare alternatives, the inclusion of the ability to inform during and assist in decision-making (i.e. intelligence) and the limitation of complexity and the generation of easy to interpret output. The tool is primarily developed for the architect so it needs to blend in the architect’s workflow enabling the architect’s creativity and guiding his intuition. Other form requirements of the design-decision support tool are the presence of customisation options and custom navigation patterns, all presented in a visual style. A concept of the web-based tool has been developed in order to illustrate what a climate-responsive design-decision support tool could look like. The heart of the tool is formed by the knowledge base, constructed from items grouped into one of four categories: principles, solutions, projects and guidelines. Relationships between items are incorporated within the knowledge base as hyperlinks, which makes it easy to navigate from one item to another. The stored information is presented in numerous ways. Info sheets provide the most detailed presentation style containing all available information for an item, while catalogues, matrices and a gallery provide quick overviews and reveal direct relationships with other items. In order to become a true design-decision support tool, the presented tool needs to be further developed. This includes the use of a more context-specific presentation style and the inclusion of more context-specific knowledge, the addition of layers in which the knowledge is presented varying from more general to practical, the development and implementation of performance indicators and a more direct and visual approach to pinpoint synergetic and conflicting effects. By using the tool, architects can access relevant knowledge in different ways that suit their method of working. It enables the presentation of complex relationships in a clear way and by doing so unlocking a much broader part of the content to them. That will help speeding up the process of design iteration before the energy concept can be assessed in the successive phase of the design process