As a result of economic and political requirements, renewable energy investments are supported with various incentives all over the world, while fossil fuel systems restricted by regulations. This article aims to make conventional heating, cooling power more efficient or develop an alternative system based on modeling office building. Considering three scenarios - classical heating-cooling syst...

The paper considers the issue of approbation adaptive predictive control for heating, ventilation and air conditioning systems, shows possibility improving regulation processes by its application on example system. idea using model is presented, principles MPC controller are noted, structure criterion choosing optimal values signal considered. feature presence mathematical object, which accurat...

Heating, ventilation and air-conditioning (HVAC) accounts for up to 50% of building energy consumption, and studies have shown significant potential for savings through the utilisation of fault detection and smart predictive control in place of traditional reactive based control systems. This paper proposes a strategy for implementing intelligent model-predictive control (MPC) of HVAC systems b...

This paper provides a review on the fouling mechanism and its effect onto the performance of finned tube heat exchangers in HVAC systems. Fouling tends to degrade the performance of heat exchangers by decreasing the heat transfer coefficient and increasing the air-side pressure drop across the heat exchangers. Air side fouling depends on a number of factors on the air side, including type and c...

A hydrodynamic vortex separator (HDVS) has been modelled using computational fluid dynamics (CFD) in order to accurately determine the residence time of the fluid at the two outlets of the HDVS using a technique that was developed for use in heating, ventilation, and air conditioning (HVAC). The results have been compared with experimental data [1]. It is shown that, in using CFD, it is possibl...

The cooling load prediction of heating, ventilating and air-conditioning (HVAC) systems in office buildings is fundamental work for optimizing the operation of HVAC systems. In this paper, an improved multivariable linear regression model is proposed to predict the daily mean cooling load of office buildings in which three main measures, including the principal component analysis (PCA) of meteo...

At the Modelica 2009 conference, we introduced the Buildings library, a freely available Modelica library for building energy and control systems [16]. This paper reports the updates of the library and presents example applications for a range of heating, ventilation and air conditioning (HVAC) systems. Over the past two years, the library has been further developed. The number of HVAC componen...

Meeting today's ventilation and comfort requirements in multiple-space VAV systems can be challenging. Building heating and cooling loads are typically not static; therefore VAV systems need to be flexible to respond to the continually changing outdoor conditions and occupant activities. To optimize comfort and minimize energy usage in this dynamic environment, the HVAC control system must also...