Over the past decades, combined heat and power production (CHP) has proven itself to be an efficient means of meeting both demands. However, high efficiency can achieved with CHP plants when load is sufficient, while lower-priority must deal excess associated generation. This used for district cooling absorption chillers. Although chiller technology using generation, its very sensitive driving ...

Campylobacter spp. cause foodborne illnesses in humans primarily through the consumption of contaminated chicken. The aim of this study was to evaluate the United States Department of Agriculture's (USDA) recommended methodology, protocol MLG 41.02, for the isolation, identification and direct plate counting of Campylobacter jejuni and C. coli samples from the broiler slaughtering process. A pl...

A mathematical model describing the behaviors of current commercialized silica gel-water adsorption chillers is presented in this study. Comparing with the previous study, this model comprises (i) a realistic representation of the thermal mass of the associated piping materials and fins; (ii) a distributed modeling of the reactor bed for the sorption processes. The model is demonstrated on a tw...

This research work aims to investigate and subsequently optimize the operating parameters that affect thermal comfort indoor air quality in school environment. The proposed design uses a coupling between solar ventilation absorption chiller-air conditioning. heating tower of an adsorption chiller connected conditioning system can be driven by waste heat from (exhausted hot air) thank this linka...

For simulation of centrifugal chiller system with differential algebraic equations (DAEs), consistent initial conditions are difficult to obtain due to the two-phase refrigerant cycle and the connections between several components. Existing rigorous initialization methods are generally not easy to apply and not suitable for the particular problem of centrifugal chiller simulation, such as the s...

In this paper, the transient model of a water-cooled centrifugal chiller is developed in Modelica with Dymola and the TLK/IfT Library (TIL). The centrifugal compressor is modeled in detail based on the turbomachinery theory. The chiller capacity control is achieved by the combination of variable inlet guide vane (VIGV) and variable speed drive (VSD). The shell-and-tube heat exchangers are discr...

Introduction: Alteration minerals are important indicators of thermochemical environments at the time of their formation – and thus indicators for the potential habitability of a site [1,2]. Therefore, the detection of alteration minerals, especially nontronite [3], on Mars was an important step to understand Mars’ hydrous history. This initial finding was followed by the detection of a wide va...

The aim of the study is to present an economic analysis of a micro cogeneration system using financial analysis (energy view) and exergoeconomic analysis (exergy view). This system uses a natural gas-fueled 30 kW microturbine to generate electricity, and to produce hot water by recovering energy from the waste heat in the exhaust gases by using a heat exchanger, which serves as the drive source...

The cooling applied during the firming and brining processes represents an important production step in mozzarella cheese making. temperature fluctuations of water can negatively affect hygiene, composition, quality mozzarella. Some sustainable systems minimize this problem by using hot process fluids as heat sources to generate refrigerated energy. This study aimed evaluate effects a new syste...

Solar ponds are characterized by high storage capacity and the ability to provide a stable continuous power source. Careful selection of extraction rate helps maintain supply temperature in range suitable for operation an absorption unit. This study proposed system which solar pond is coupled with chiller investigate resulting advantages. The cooled using water upper convective zone, ensures th...