Does entrepreneurship hold the key? Steering through income inequality towards happiness

A metrological analysis of a (Direct Digital Control) DDC-based air conditioning system

Although (Direct Digital Control) DDC-based air conditioning systems can potentially carry out efficiency checks, the instrumentation installed in these systems is not always suitable for making reliable plant status estimations. In order to verify the metrological performances of these systems and to define how reliable measurements can be made the authors set up a small-sized HVAC (Heating Ventilating and Air Conditioning) system provided with standard HVAC type sensors. The measurement ins...

Direct and indirect measurement of WBGT index in transversal flow

ISO 7243 considers the WBGT (Wet Bulb Globe Temperature) index as an index of thermal stress in hot environments. It can be evaluated directly by measuring the globe temperature, the natural wet bulb temperature, and the air temperature (only outside in the presence of solar radiation) or, indirectly, by measuring the air temperature, the air velocity, the humidity and the mean radiant temperature. The globe and natural wet bulb temperatures can only be estimated empirically, because they are...

Micro-combined heat and power in residential and light commercial applications

The cogeneration is worldwide considered as the major option to achieve considerable energy saving with respect to traditional systems. This paper deals with the application of micro-cogeneration (electrical power <15 kW) to small scale (residential and light commercial application) users; the state of art of this technology is considered and an energetic analysis of MCHP system regarding its utilization in conjuction with domestic household appliances is performed. Finally the test facili...