Since recent years cooling demand in office buildings has tremendously increased due to higher internal heat production of equipment, lighting and higher thermal comfort requirements. Classical cooling machines needs a lot of electricity to cover these high demands when primary energy factors are taken into consideration. The use of vertical borehole heat exchangers (BHEs) in combination with a ground source heat pump (GSHP) reduces the energy consumption for the office building. The optimum number of vertical borehole heat exchangers is simulated.
This document describes the rehabilitation of the GeneralSecretariat Information Systems (GSIS building) and the description of the energy measures that were implemented aiming at the improvement of the buildingenergy performance and the indoor environmental conditions.
Low depth geothermal energy can be efficiently used as a heat sink for building energy produced during summer.In the current work, several geometries of geothermalheat exchangers implemented in office building climatisationprojects are evaluated for their energetic performance.For all geometries, simulation models were developed and validated using the experimental data, so that parameter studies could be carried out.A main result of the performance analysis is that the ground coupled heat exchangers have excellent coefficientsof performance ranging from 20 50 as average annual ratios of co
This project presents the performance of air washer chilled water coil system for a yarn industry .The basicprinciples including (1) effectiveness, (2) saturation efficiency and energy consumption for the systems are evaluated.. In addition these spray system prevents the contaminants produced in yarn industries entering into the system. This paper also presents the results of direct evaporative cooling processes, energy efficiency ratio and cooling efficiency for the air washer chilled water coil system.
In this study we identify and describe the design strategiesadapted to the climate and used in ancient constructions.The research is focused on the information obtained from cases found in voras architecture. The aim of this paper is to sensitize the rational use of energyshowing efficient natural cooling design strategies to achieve it. It can thus be an effective tool for attenuating the growth of energy consumption for air conditioning. The results of the study can be used to adapt some of these strategies to new constructions in this region or regions with similar climates.
This paper looked into the possibilities of adaptive reusethrough the environmental retrofit of an existing warehouse. The project was built on the intent of convertingan abandoned building into an exhibition hall, within the tropical island climate of Subic Bay, Philippines.Analyses of the existing warehouse were undertaken;from this initial study, three main strategies were identified shading, the use of thermal mass, and ventilation.These three aspects formed the core of the research,and were further investigated through the use of computer simulations.
There are in Brazil ten million people in the south region of the country. In the south states of Brazil the buildings of social interest do not have any kind of heating possibility.Although it is hot in the most part of the country, in the winter there are some regions in south with negative temperatures. The costs of the energy and technology for heating are expensive. This makes with those who doesnt have financial conditions do not have thermal quality in the winter, because in this cases there are not any kind of heating systems in the buildings.
This paper presents the basic parameters and energy flows of an aquifer thermal energy storage (ATES) systemcombined with reversible water/water heat pumps used for heating and cooling the new hospital Klina (Antwerp Belgium). The system is one of the first ATES projects in Belgium, and its operation is monitoredwith the aid of a DAQ system. The energy flows, primary energy consumption and CO2 emission reductionwere calculated based on DAQ loggings of the first 3 years of systems operation.
Energy-efficiency benchmarking can be used to monitorchanges in overall efficiency of buildings. Benchmarkingmodels, based on energy-efficiency indicators are valuable tools for both public and private stakeholdersbecause they allow an improvement in the building energy management . For the last decade, some governmentshave used these tools to define their building regulations(M. Santamouris, 2005, W. Chung 2005). This paper tries to goes further, integrating a benchmarking and a modelling process, in the same energy efficiency analysis.
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