This paper presents the preliminary experimental results of a liquid desiccant cooling system driven by the flue gas waste heat of a biomass boiler. The desiccant cooling system is mainly composed of a regenerator, a dehumidifier and an evaporative cooler. The flue gas waste heat is applied to...

A turbine ventilator is a device having a combined function of wind turbine and extract fan. Turbine ventilators are attractive replacements for electrical ventilation fans in terms of using wind energy. They are commonly used in attic, loft and rooftop spaces to facilitate ventilation in...

Preliminary lens-walled CPC (compound parabolic concentrator) was proposed owing to its larger half acceptance angle, but in fact, it has another advantage of more uniform flux distribution than mirror CPC with the same geometrical concentration ratio. In this paper, in order to firstly evaluate...

This paper presents a feasibility study of a low-energy consumption ground source cooling system based on a periodic two-phase thermosyphon (PTPT) device in which a condensate is periodically transferred back to the evaporator. Operation of the PTPT is passive with the ground condenser...

Aerogels are a special type of solid material with nanometre-scale pores 1/3000th the width of a human hair. Porosity is in excess of 90%, in some cases as high as 99.9%, and densities can be as low as 3 kg/m-super-3. Aerogels are essentially ‘puffed-up sand’ and are often termed ‘frozen...

The pressure-loss coefficient for a duct junction of square cross-section was determined using computational fluid dynamics (CFD). The predicted junction pressure-loss coefficient for combining flows was generally in good agreement with experimental data from the literature. The junction...

This paper presents measurements and predictions of the pressure-loss coefficient for a wide-angle, three-dimensional diffuser with free discharge. The constant tracer-gas method was used for measuring duct mean velocity, and static pressure tappings for pressure change across the diffuser. The...

Heating, ventilating, and air-conditioning (HVAC) are parts of the major energy consumption in a building. Conventional heating and cooling systems are having an impact on carbon dioxide emissions, as well as on security of energy supply. In this regard, one of the attempts taken by researchers...