Climate control and monitoring of greenhouses is an important application which has some peculiar features. From a practical point of view, in order to achieve effective cultivation plans, the best environmental conditions inside a greenhouse have to be ensured. This requires that some specific variables, such as temperature, humidity and luminosity are controlled in order to follow desired pro...

The use of evolutionary algorithms for calculation of the optimal control of the states of a greenhouse system will be presented. The integrated model employed (greenhouse climate, crop growth, outside weather conditions and control equipment) predicts temperature, air humidity and CO2 concentration in a time interval of 15-60 minutes (short time-scale model). The paper presents the optimizatio...

One of the main consumers of energy in buildings are the HVAC systems intended to maintain the internal environment for the comfort and safety of the occupants. Occupant satisfaction, is influenced by many different factors, including air temperature, radiant temperature, humidity, the outdoor environment, activity levels and clothing. Occupant thermal comfort is traditionally measured by the P...

It is very important that the comfortable indoor climate is built for crop growing in greenhouse. To adjust the temperature and humidity, the natural ventilation operation and indoor airflow operation is necessary to be controlled. Depending on many researches and analysis for indoor climate of greenhouse, it is proved that the two main parameters, temperature and humidity in greenhouse, correl...

The base of this paper is built on the work in progress focused on the applicability of the KNX technology for protected cultivation industry. The authors present a description of this application area, which is new for the KNX, by providing the details and requirements of the climate control systems used in greenhouses. As an example of specific application domain, a control of humidity level ...

The activity of a vapor-phase disinfectant is usually expressed in terms of the atmospheric relative humidity (RH). This study shows that, in beta-propiolactone (BPL) vapor disinfection, the important factor is really the moisture content and location of water in the cell, and not necessarily the atmospheric RH. Previous studies revealed that only about 50% of the bacterial spores equilibrated ...

Experiments concerning a full-scale demonstration of air purifying pavement in Hengelo, The Netherlands, are reported. The full width of the street was provided with concrete pavement containing TiO₂ over a length of 150 m ("DeNOx street"). Another part of the street, about 100 m, was paved with normal paving blocks ("Control street"). The outdoor monitoring was done during 26 days for a period...

To tackle with the current situation of China's chick raising industry that is characterized with plenty insufficient automatic level and underdeveloped management techniques, a chicken coop surveillance system based upon wireless sensor network proposed in this article is composed of 4 major components like parameter collection module, host and slave computer as well as wireless communication ...