An intensive study was developed to assess the influence of different flow conditions in the chlorine decay of drinking water systems based on a series of experiments tested on a loop pipe linked to the Lisbon water distribution system. Water samples and chlorine measurements were taken under...

The utilisation of greenhouses in Portugal, have to deal with some specific climate problems like frost, during winter and overheating in summer days. These problems show the necessity of having a tool capable of predicting the thermal behaviour of a greenhouse under specific exterior...

The single effect basin type solar still has been for long the cheapest way to produce drinkable water from sea water using solar equipment (Howe and Tleimat, 1977). Nevertheless the operating efficiency is low, around 35 %, due mainly to the rejection to the atmosphere of the latent heat of...