Optimal Air-volume-demand Calculation of High-speed RailIntelligent Air-conditioning System Based on Passenger Distribution

Fully Fresh Air Air-conditioning System Equipped with Double Heat Pipe Based Heat Recovery Technology

The using of double heat pipe based heat exchanger (HPHX) in a conventional fully fresh air air-conditioning (AC) system was examined in the present study. The fabricated HPHXs were tested under the actual conditions and the measured data were used to study the performance of the existing AC system (System A) and AC system equipped with the double HPHX (System B) for a yearly operation through ...

Simplified Model-based Optimal Control of Vav Air-conditioning System

A simplified optimization process (SOP) for determining set points is proposed and evaluated using the monitoring data and model of an existing VAV system. Controller set points, such as supply air temperature, supply duct static pressure, and chilled water supply temperature, are determined by this proposed SOP in order to minimize energy use while respecting thermal comfort. Zone air temperat...

Air passenger demand forecasting and passenger terminal capacity expansion: A system dynamics framework

This paper deals with how to develop a model to forecast air passenger demand and to evaluate some policy scenarios related with runway and passenger terminal capacity expansion to meet the future demand. System dynamics frameworks can be used to model, to analyze and to generate scenario to increase the system performance because of its capability of representing physical and information flows...

Alternative Air Conditioning Technologies: Underfloor Air Distribution (UFAD): Technology Focus

Introduction and Background Recent trends in today’s office environment make it increasingly more difficult for conventional centralized HVAC systems to satisfy the environmental preferences of individual office workers using the standardized approach of providing a single uniform thermal and ventilation environment. Since its original introduction in West Germany during the 1950s, the open pla...

Air Conditioning Check and Air Conditioning Service