Search results for "Cooling"

Experimental results on a solar desiccant and evaporative cooling system equipped with wet heat exchangers

2012

An innovative solar assisted desiccant and evaporative cooling (DEC) system for building air conditioning has been installed at the Solar Laboratory of the University of Palermo. In this system, air-to-air packaged wet heat exchangers are used to maximise the exploitation of the evaporative cooling potential associated with the exhaust air stream. Results obtained are very positive, showing that DEC systems can benefit from the use of wet heat exchangers to efficiently cool the air stream after the adsorption process in the desiccant wheel, without any change in moisture content

A bottom-up method for evaluating the whole energy demand of large residential building stocks: an application to a regional scale

2013

In this paper a method is described, originally conceived during the compilation of the Energy and Environmental Regional Plan of Sicily, aimed to: a) set up a lay-out model of an overall regional residential estate into a certain number of different building and heating system types; b) calculate the energy needs of every single type according to the procedures established by the national and European regulations; The method is particularly designed to evaluate the possible energy savings from the implementation of different interventions concerning the envelope and the HVAC systems to the various building types. The method, although based on several assumptions, shows to be reliable enoug…

A CCHP system fed by low enthalpy sources in Mediterranean area

2018

Climate change and energy consumption increasingly call for a better use of energy sources. Renewable sources are still growing in the power production of many countries, so leading to the reduction of CO2 emissions. Further restrictions will be applied to the use of fossil fuels with a lot of consequences; for example, major German cities such as Stuttgart, Dusseldorf and Hamburg are all contemplating bans related to diesel pollution, and on the other hand some of the biggest car producers - FCA, Toyota, etc. - are planning to stop the diesel engines production in a few years. At the same time, some restrictions are applied also to many refrigerating fluids, in order of firstly limiting th…

Beccali M., Progettazione, realizzazione e monitoraggio di un impianto Solar Desiccant and Evaporative Cooling (DEC)

2010

Heat driven cooling technologies: open clycle systems”, in Solar Cooling Handbook: A guide to solar assisted cooling and dehumidification processes

2013

Desiccant cooling simulation and design in Matlab/Simlink environment: implementation and validation of the model

2009

Thermal-hydraulic analysis on the cooling system of the target in the SPES plant

2012

Effect of pressure on the PVT behaviour of iPP as revealed by dilatometric measurements

2002

Isotactic Poly-propylene samples, previously prepared under known conditions of pressure and cooling rate by means of a special apparatus designed and set-up by the authors, were subjected to several isobaric runs at low cooling and heating rate in a confining fluid dilatometer (by GNOMIX). The effect of the previous thermo-mechanical histories and the effect of pressure in the dilatometry on specific volume of the samples was studied. Results show that the initial specific volume depends upon the previous thermo-mechanical histories, which however cancels out after the first heating run. Moreover the reported dilatometric experimental data support the evidence that an increase of pressure …

A brine evaporative cooler/concentrator for autonomous thermal desalination units

2011

In recent years growing attention has been paid to the problem of brine disposal due to the raising awareness of significant environmental issues related to the use of desalination processes for fresh water production. This is particularly relevant when desalination units are located in remote sites, characterised by major complexity in the construction and management of intake and outfall structures. In the present work a novel device, named brine evaporative cooler/concentrator (BECC, patent pending), has been developed for coupling with small-scale thermal desalination plants in order to reduce the problem of brine disposal. Such device fulfils two different functions: i) cooling of the …

Crushing of interstellar gas clouds in supernova remnants. I. The role of thermal conduction and radiative losses

2005

We model the hydrodynamic interaction of a shock wave of an evolved supernova remnant with a small interstellar gas cloud like the ones observed in the Cygnus loop and in the Vela SNR. We investigate the interplay between radiative cooling and thermal conduction during cloud evolution and their effect on the mass and energy exchange between the cloud and the surrounding medium. Through the study of two cases characterized by different Mach numbers of the primary shock (M = 30 and 50, corresponding to a post-shock temperature $T\approx 1.7\times 10^6$ K and $\approx 4.7\times 10^6$ K, respectively), we explore two very different physical regimes: for M = 30, the radiative losses dominate the…