The issue of sustainability has been prevailed not only in building industry but also all otherindustries. It has been raised that the concept of green building system should be taken intoaccount for the design of buildings. This study is to understand characteristics of the greenbuilding system and find the solution of urban problems. Now, over 60% people all over theworld live in urban areas, and their communities continue to expand. Pollution and otherhazards also tend to accumulate in urban areas.
This paper gives an overview of selected Micro CHP technologies and products with thefocus on Stirling and steam machines. First results of field tests in Germany, the UnitedKingdom and some other EC countries are presented and commented in the paper. The firstfield test results available to the date show that along with the overall positive performancethere are some differences in sector performance (domestic vs small business).
This paper presents an established sustainable and integrated design methodology for theefficient heating and cooling of individual buildings and complexes. The methodologyincludes the design basis for combined heat and power systems, refrigeration, air conditioningand heating with pump systems. It is equally applicable for single family houses as well aslarge building complexes and meets a major challenge in the design of heating and coolingsystems, namely, the complexity of energy and power integration.
Object of the R&D activities of the last 2 years was the development of the new generation ofa stationary low temperature PEM fuel cell system (operating temperature max. 80C) withthe following features- 5 kW electrical power- 10 T / kW electrical power- robust continuous operation- lifetime greater than 10.000 h- system volume less than 1.000 dm.This new system is a pre-stage for a market suitable system. With some modifications it alsoallows an upgrade to a middle temperature system (operating temperature max. 120C).
This paper presents the basic parameters and energy flows of an aquifer thermal energystorage (ATES) system combined with reversible water/water heat pumps used for heatingand cooling the new hospital Klina (Antwerp Belgium). The installation system is one of thefirst ATES projects in Belgium, and its operation is monitored with the aid of a DAQ system.The energy flows, primary energy consumption, CO2 emission reduction, were calculatedbased on DAQ loggings of the first 3 years of systems operation.
A more efficient use of energy in the built environment is absolutely necessary. Using theexergy concept delivers more complete information on the use of the energy flows withinbuildings and opens up room for further improvements within the field. The aim of this studyis to gain deeper insight into how the energy is being used in two already efficient buildingsystems, namely a balanced ventilation system with heat recovery and a solar thermal systemfor space heating supply. Furthermore, desirable optimization chances for them will bepinpointed.
The construction of a building with an optimized thermal and energy performance and anaccordingly low energy demand does not necessarily require higher investment costs. Thedecisive factor is an interdisciplinary and foresighted an Integrated Energy Design.Although this integrated approach prolongs the design process and increases the planningbudget, in return the construction time and the subsequent costs such as energy and operatingcosts are significantly reduced.
HVAC load weighs a large portion of overall building energy consumption. A low storeybuilding of 20,000m2 floor area adopted a task ambient conditioning system (TAC) to reduceHVAC load while maintaining work environment. Other design techniques such as doubleskinfacade and structural thermal storage system, were also applied and the TAC systemachieved comfortable personal work-environment with reduced demand.
The paper presents a comparative study among six different solutions regarding the energysupply of a high-tech building. All the solutions take into account the coupling of the sourcesof energy and the energy storage, considering equipments like: boilers, compression andabsorption refrigeration machines, thermal motors, fuel cells, storage tanks and the use of theunderground water and an artificial lake. The functioning of the different solutions wassimulated using Simulink - Matlab.
The climate in southern Brazil is characterised by mild winters and hot-humid summerswhich requires the design to be adaptable to the often conflicting summer and winterrequirements. In the residential sector, air conditioning consumption is still low, but it hasbeen growing significantly along with an increase in peoples purchasing power whichemphasizes the importance of encouraging a change in construction practices [1].
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