part without written permission of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., 1791 Tullie Circle, NE, Atlanta, GA 30329. Opinions, findings, conclusions, or recommendations expressed in this paper are those of the author(s) and do not necessarily reflect the views of ASHRAE. Written questions and comments regarding this paper should be received at ASHRA...

Energy simulation models are developed with EnergyPlus for two office buildings in a R&D center in Shanghai, China to evaluate the energy cost savings of green building design options compared with the baseline building. As a R&D center of an international IT corporation, there are data centers in the two buildings, which make them different from typical office buildings. The data centers house...

The purpose of ventilation is dilute or remove indoor contaminants that an occupant is exposed to. In a multi-zone environment such as a house, there will be different dilution rates and different source strengths in every zone. Most US homes have central HVAC systems, which tend to mix the air thus the indoor conditions between zones. Different types of ventilation systems will provide differe...

Evaluation of Various Turbulence Models in Predicting Airflow and 1 Turbulence in Enclosed Environments by CFD: Part-1: 2 Summary of Prevalent Turbulence Models 3 4 Zhiqiang Zhai Zhao Zhang Wei Zhang Qingyan Chen 5 Member ASHRAE Student Member ASHRAE Member ASHRAE Fellow ASHRAE 6 7 Air distributions in enclosed environments are crucial to thermal comfort and air quality. 8 Computational fluid d...

A set of enhancements to the ASHRAE Handbook are presented to demonstrate the effectiveness ofmultimedia and advancedpresentation techniques, such as three-dimensional computer graphics, visualization, and animation techniques. These results can also serve as a model and guide for the broader use of these techniques in other ASHRAE publications. GENERAL INTRODUCTION TO PROJECT In this paper, we...

Opportunities for energy efficiency a re often investigated for the buildings of a campus, without afocus on the central plants serving the multi-buildine C£llI1pUS, Quite ojten, a majority of the energy efficiencr opportunities ore present ill the central plants, ln such pia 11ts, ret rofi II ing the central plants with tuore efficient equipment or changing operating strategies can have a sign...

Background: The adoption of air conditioning (AC) is growing rapidly in developing countries across the world which puts a high burden on electricity distribution systems. This development is mostly driven by income growth and building design, but also due to increasing outdoor temperatures and to provide indoor thermal comfort. Current indoor thermal comfort standards are based on western clot...

The influence of the bioclimatic elements upon the building behavior is analyzed using Matlab/ Simulink and toolbox HAMBASE. However, this software does not take into account a crucial element characteristic of these bioclimatic buildings, the air density. We propose an enhancement of existing computer code by adding a model to calculate the air density characteristic along the already existing...

Solar water heaters are good tools for saving fuel. The main component of these water heaters is collectors, which are responsible for absorbing solar energy and transferring it to the working fluid with the least heat dissipation. The present study is an experimental study of the performance of the solar semispherical collector with 1 m2 of absorber area at different volumetric flow...

In 1994, ASHRAE began developing a guideline for measuring retrofit savings (GPC-14P). In support ofGuide­ line-14p, ASHRAE initiated RP-1050 to develop a toolkit for calculating linear, change-point linear, and multiple-linear inverse building energy models. The resulting Inverse Model­ ing Toolkit (IMT) can be usedaspart ofaprocedure to measure savings. This paper describes the numerical algo...