69 research outputs found
Gestione ottima di sistemi con refrigeratori in parallelo mediante unalgoritmo genetico multi-fase
No full textAdvanced control systems for single compressor chiller units
No full textn this paper the problem of designing advanced control systems for increasing the performances of low capacity HVAC system with single scroll compressor is addressed. In particular, a simulation environment based on Matlab/Simulink that has been validated on a state-of-the-art experimental facility and used to design an adaptive controller for single scroll compressor, packaged air-cooled water chillers is presented. The capability of the controller to substantially increase the energy performance of the system, as well as to achieve excellent regulation performances in process applications is demonstrated
A simulation environment for the design of advanced chiller control systems
No full textIn this paper we address the problem of designing advanced control systems for increasing the performances of one of the key elements of an HVAC system, the chiller unit. In particular, we present a simulation environment based on Matlab/Simulink that has been validated on a state-of-the-art experimental facility and used to design an adaptive controller for single scroll compressor, packaged air-cooled water chillers, that allows to substantially increase the energy performance of the system, as well as to achieve excellent regulation performances in process applications
Quality control and data validation procedure in large-scale quantitative monitoring of mosquito density. The case of Aedes albopictus in Emilia-Romagna region, Italy
No full textThe risk of local transmission of chikungunya, dengue, and Zika viruses from viremic travelers arriving from affected areas is a real possibility in southern Europe, due to the large presence of the vector Aedes albopictus. The first chikungunya outbreak in Europe occurred in the Emilia-Romagna region, Italy, in 2007, prompting the regional public health department to implement an Ae. albopictus monitoring and control plan. This paper presents the procedure developed for the quality control of the data collected by the regional ovitrap monitoring network. The quality control procedure consists of four successive steps; the first step is data acquisition and the second is an automatic data processing step, while skilled technicians according to specific procedures perform the third and fourth steps by checking the exact position of the ovitraps and by conducting human landing collections, respectively. The paper also presents the results of this quality control procedure applied to the data collected through the large-scale Ae. albopictus monitoring operation performed in Emilia-Romagna in 2015
Method for estimation the thermal load of a circuit for a service fluid at outlet from a refrigerating machine
No full text
Method for regulating the delivery temperature of a service fluid in output from a refrigerating machine
No full textControl device for a refrigerating machine
No full textThe present invention concerns a control device for a refrigerating machine according to claim 1. In particular, the present invention finds useful, but not exclusive, application in the regulation of the delivery
temperature of a service fluid in output from a water chiller for centralized air-conditioning systems, to which the following
description shall make explicit reference without, however, any loss of generality
Dispersal and Survival of Aedes albopictus (Diptera: Culicidae) Males in Italian Urban Areas and Significance for Sterile Insect Technique Application
No full textThe dispersal and survival of laboratory-reared Aedes albopictus Skuse males were investigated during the summer of 2007 in three Northern Italy urban localities by mark-release-recapture techniques. Two marking methods were compared: one group of males was dusted with fluorescent pigments on the body (FP), and the other group was obtained from a strain whose natural infection of Wolbachia had been removed (WB0). FP- and WB0-marked males were released as adults and pupae, respectively, in one fixed station at each locality. Recaptures were performed by skilled technicians, within a radius of 350 m from the release site, on days 4, 5, and 7 after the release, and the males were collected while flying around the technician's body or in swarms. Recapture rates ranged from 0.63 to 4.72% for FP males and from 2.39 to 11.05% for WBO males. The mean distance traveled for WBO males was significantly higher than for FP males; no difference was observed between the dispersal distance measured for the males recaptured on human host versus males recaptured while swarming. No further increase of the dispersal occurred during the postrelease period investigated (from day 4 to day 7 after release). The mean survival rate at the release was 0.51 for FP-marked males and 0.81 for WBO males. The data obtained are discussed for their significance in planning sterile insect technique programs against Ae. albopictus
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