LoginThis paper summarizes key results of ASHRAE Research project RP-1137, which sought to quantify the benefits and longevity of the recommissioning process on variable air volume (VAV) systems that incorporate direct digital control (DDC).
Bibliographic database Airbase
AIRBASE is the Bibliographic Database of the AIVC. It contains publications and abstracts of articles related to energy efficient ventilation. Where possible, sufficient detail is supplied in the bibliographic details for users to trace and order the material via their own libraries. Topics include: ventilation strategies, design and retrofit methods, calculation techniques, standards and regulations, measurement methods, indoor air quality and energy implications etc. Entries are based on articles and reports published in journals, internal publications and research reports, produced both by university departments and by building research institutions throughout the world. AIRBASE has grown and evolved over many years (1979 to present day, over 22000 references and 16000 documents available online). For most of the references, the full document is also available online.
The AIVC website includes a protected content feature that provides access to AIRBASE. Access to the protected content is free of charge but requires you to register first.
This paper proposes an intelligent controller for an air-handling unit to control the temperature while limiting the humidity below 70%. The proposed scheme is based on the back-propagation-through-time approach.
This study aims at developing a radiant floor cooling system using the existing Ondol (radiant floor heating system). It was found that the proposed system could provide cooling for thermal comfort with higher energy efficiency.
This paper present a survey technique for rating HVAC systems. System components are grouped into categories.
The objective of this investigation was to evaluate the field performance of room air distribution in two rooms of a high performance home (low heating and cooling load).
The laboratory air-handling unit (LAHU) system is designed to improve building energy performance and indoor air quality (IAQ) in laboratory buildings.
Local airflow gives different sensations at different locations on a human body as the thickness of natural convection is not equal over the body surface.
In a local exhaust ventilation system, the exhaust air velocity decreases very rapidly with distance from the exhaust inlet.One possible way of maintaining a high capture velocity far from the exhaust inlet is the use of vortex flow, usually calle
Relative humidity sensors are common components in building heating, ventilating and air-conditioning (HVAC) systems, and their performance can significantly impact energy use in these systems.
This paper compares two models that were developed independently for predicting the particle separation efficiency of a vane-induced uniflow cyclone. The Zhang model was based on indirect analysis.
A mathematical formulation was developed including an objective function that minimizes the cumulative exposure of occupants to pollutants under the constraints of pollutant dispersion pattern, evacuation paths, and their capacities.
This paper discusses the development of a methodology to quantify the impact of fenestration systems on human thermal comfort with a representative case study.
This paper discusses the development of a methodology to quantify window performance on human thermal comfort with eight case studies of different window systems.
This paper reports the relative energy consumption of prototype VAV and CAV air-conditioning systems under various load conditions simulating those of a typical office building in humid tropical climates such as Singapore's.
This paper provides an example of a local energy code that acieves a significant energy efficiency improvement in buildings compared to ANSI/ASHRAE/IESNA Standard 90.1-1999 and describes the methodology for estimating the relative energy savings.F
This paper presents results from European Union projects on ductworlk quality tightness. The projects were done in Sweden, Belgium, and France.
An experimental program was initiated to determine the friction factor in a straight duct and the loss coefficient of either a single elbow or two elbows places in close proximity.
The central thrust of this paper is to provide automation and control design guidance for engineers considering dedicated outdoor air systems (DOAS) operating in parallel with ceiling radiant cooling panel systems (CRCP) in nonresidential commerci
This paper uses computational fluid dynamics (FD) modeling to assess the accuracy of the simplified frame cavity conduction/convection models presented in ISO 15099 and used in software for rating and labeling window products.
This paper presents the development of an intermediate model between CFD models and well-mixed models, the integrated zonal model (IZM) , to predict three-dimensional airflow, temperature, and VOC concentration distributions within a room.