Photocatalytic oxidation (PCO) tests have been carried out for toluene adsorbed on the TiO2/ACFcatalyst in an environmental condition controlled chamber. TiO2/ACF catalyst was made andcharacterized by N2 adsorption isotherm for pore structure and scanning electron microscopy (SEM) formorphology respectively.
Supermarket is common in China because of its convenience and abundant merchandise. People insupermarket can be classified into two categories: clients and operators. This research measures thetemperature and relative humidity of four supermarkets to describe the indoor thermal environment,investigates the satisfactory degree of clients and operators on the indoor environment, and analysesthe reasons of dissatisfaction.
Increase of energy consumption and deforestation within cities has already begun raising average urbantemperature: this phenomenon is called urban heat island (UHL). A phenomenon in which there is aconsistent increase in urban air temperature and a decrease in the relative humidity as compare to ruralareas. Generally, research on this topic has been based on observational, theoretical and modelingapproaches.
District Heating and Cooling system (DHC) is an efficient energy system as they can supply chilled andheating water/steam effectively by integrating heating and cooling demand of neighboring buildings.However, there is possibility for further improvement of energy efficiency by integrated operation ofadjacent DHC and utilizing waste heat from municipal incinerators and CHPs. In this study, the effect ofsuch flexible use of heat and electricity in integrated DHC systems is examined. The main object is toraise total thermal efficiency and reduce CO2 emission.
Sick building syndrome, which has become a major public concern in recent years, is caused in part byvolatile organic compounds (VOCs) emitted by building materials. In order to ensure the safety of ourenvironment, it is necessary to predict indoor VOCs concentrations over a long period of time.Long-term prediction of VOCs concentration requires the consideration of the influence of temperaturechanges, and there is a need for a simple prediction method that can be used for this purpose. Theprediction methods that have been proposed thus far, however, do not meet this requirement.
In recent years, as a supplement for conventional large-scale power generation system, distributedenergy resources (DER) system has got more comprehensive attention. This is based on the visionthat future electric power system will not be built solely as centralized systems as they are today. It alsohelps to reduce the amount of transmission losses and grid investments. One possible alternative tothe traditional paradigm is the microgrid (?Grid), a localized network of DER system matched to localenergy demands.
Sweden is a country with a severe winter climate. Nevertheless, cooling during working hours is oftenrequired all year around in offices. Frequently passive chilled beams are used for providing additionalcooling. Often the chilled beams are installed above a false ceiling and thereby the room issubdivided into two compartments. From the chilled beam a plume is generated. Mock up air (returnair) is required to flow into the upper compartment to substitute the airflow generated by the chilledbeam. Therefore purpose provided openings are installed in the false ceiling.
With the increasing concerns on the issues of global warming, urban heat island and depletion of fossilfuels, energy saving effort is getting more and more important, particularly in the city context. Althoughthere are a number of sectoral energy related studies, comprehensive overview of the overall energyuse in cities is still not well understood.
Photovoltaic-thermal (PV/T) systems integrate photovoltaic and solar thermal technologies into onesingle system with dual production of electricity and heat energy. There are alternative designs to suitdifferent applications. For a given collector surface area, the overall system energy performance ishigher than the conventional "side-by-side" PV and solar thermal systems. This helps to promote PVsince the economic payback period of PV/T is much shorter. In this paper, the various water-basedPV/T systems and products are reviewed.
In hot and humid climates, desiccant air-conditioning systems have been suggested as suitable forimproving Indoor Air Quality (IAQ). Generally as dehumidification devices, various types of silica gelrotor have been used to control humidity.
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