Lightpad 2.0 : a portable audit and design (pad) tool for evaluating retrofit lighting options

The EPRI LightPAD program is a simple but powerful lighting audit and analysis tool for assessing installed lighting systems and proposing cost-effective, energy-efficient retrofit alternatives. LightPAD enables on-site data entry to the analysis program, improving both speed and accuracy by removing the step of making hand-written field notes.

ISLEC : a self-emerging dynamic simulation model

InteSys Limited has developed a new dynamic simulation model for buildings, which emerges by itself as it receives the data or signals from the building under consideration. The model exists in two forms Software written for PC Windows environment; and Hardware in the forra of a silicon microchip. This work is an extension of the previous work by Jankovic (1991 -1993). The software has been developed in C" and runs under Windows 3.1 or above. The paper describes the operation of this software.

Intelligent computer control of air conditioning systems based on genetic algorithm and classifier system

Conventional control schernes for air condítioning systems are in lack of the capabilities to adapt to a changing enviroranent and to optimize against given criteria. In this paper, a methodology is presented, which employs a classifier system with genetic algorithm to enable an air-conditioning controller to learn from its own experience the best control strategy against a given performance evaluation scherne.

Integration of building energy simulation and HVAC design tools in the combine project

Software packages form an integral part of the practices of most building design professionals today. Studies in the UK show that CAD is used in 81% of architectural practices. However, these packages fali short of ideal when it comes to data exchange. 

Integrating design tools into the design process

There are two almost orthogonal aspects that need to be considered when looking at the use of design tools by the profession, the integration of the design tools "around" the product being designed and the integration of the tools "into" the process using them. In the building design field, the "Product" aspect of this has received much more attention than the "process" aspects. However, in the business arena, Process Support is the latest "hot topic" and is spawning lots of new systems.

Incorporating a modular system simulation program into a large energy analysis program : the linking of IBLAST and HVACSIM+

Most currently available hourly energy analysis programs utilize separate and sequential simulations of the building, air handling systems, and primary energy plants. This results in a lack of feedback from the system to the building and from the pIant to the system and building. This is especially a problem when an undersized system or plant is simulated. If an undersized system were actually installed in a building the zone cooling and or heating loads could not be met all the time causing the temperatures to float out of the desired range.

Implications of room air motion on control of thermal comfort in rooms with natural convection heat sources

Electric and hydronic baseboard heating systems rely on natural-convection-driven air motion to distribute energy throughout a space to maintain thermal comfort. For electric baseboard heating systems employing an on/off control scherne, the room air motion and consequent room temperature distributions are time-dependent. The thermostat cycling rate and location play a significant role in determining the air temperature swings, changes in room air velocity, and possibly in the mixing of ventilation air to dilute indoor air pollutants.

IDA : an environment for building and energy systems simulation

IDA is a flexible, object-oriented, environment for simulation of buildings and their subsystems. The key features of the system are summarized. Available IDA literature is listed. 

HVAC component model libraries for equation-based solvers

This paper discusses development of a library of equation-based models for building HVAC system simulation. The main source of the models is the ASHRAE Secondary Systems Toolkit (Brandemuehl 1993), augmented with primary system models from other sources in order to provide a library sufficient to model conunon HVAC systems.

How to overcome the HVAC simulation obstacles

Examples on application of system simulation in preplanning, sizing and comissioning of HVAC systems are briefly given and typical obstacles for a more broader utilization in engineering offices are introduced. Efforts needed to overcome most of the obstades are described. It is shown that currently system simulation is a business for experts. To increase the application of simulation in HVAC engineering offices efforts should be made in training and supporting these experts. 

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