Thermodynamic Solar Articles
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Access to energy is a global priority for everyone
As we move towards a more digitized community, access to energy remains crucial for both individual well-being and national economic development. Let’s take reference from what the United Nations shared. According to the UN Advisory Group on Energy and Climate Change, access to energy is considered a key factor in reducing poverty. That echoes our own experience in many countries, where we ...
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Sicily 02 - ZE-50-ULH - Solar Concentrator Panels + Methane-Fueled Gas Boiler - Case Study
Plant: 1 x ZE-50-ULH Low-Temperature Organic Rankine Cycle (ORC) Module, nominal output 50 kWe Nominal output: 50kWe Application: Didactic hybrid plant (solar concentrator panels + methane-fueled gas boiler) Location: Province of Enna, Sicily, Italy Manager: Private Italian University The client who commissioned this plant is a recently-estabilished private university which has decided to ...
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Parametric study and exergy analysis of solar water–lithium bromide absorption cooling system
This paper presents the energy and exergy analysis of single–effect water–lithium bromide absorption cooling system driven by the heat supplied by a field of solar thermal collectors with a cooling capacity of 10 kW. The work is devoted to the study, the evaluation and distribution of the destroyed exergy for each component constituting this kind of system. The thermodynamic models have been ...
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New definition of fluid exergy in a gravitational field
This paper discusses the concept of working fluid exergy in an atmosphere stratified by a gravitational field, particularly the hot humid air in the atmosphere. A definition of exergy, different from that recently proposed by Petela (2008), is presented. Thermodynamic diagrams illustrate its elements and its technically feasible part in a transparent way. Reference papers are given for ...
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Thermodynamic analysis of solar parabolic dish thermoelectric generator
This paper presents thermodynamic analysis of solar parabolic dish thermoelectric generator (TEG) using energy and exergy efficiencies to a given set of operating parameters. The system contains solar parabolic dish concentrator (PDC) and TEG on its focal point, the analytical expression for energy and exergy efficiency equation is used for each component to evaluate its thermodynamic ...
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Exergy analysis of a rock bed thermal storage system
In this paper, a thermodynamic procedure is presented to analyse energy and exergy balances of a rock bed thermal storage system. The thermal behaviour is described by means of a control volume that includes three subsystems: the solar collectors, the fluid distribution system and the storage chamber. Solar-to-thermal energy conversion was obtained by means of a solar collector at a fixed airflow ...
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Exergetic analysis of solar powered absorption refrigeration system using LiBr-H2O and NH3-H2O as working fluids
This study provides an easy to follow description of the second law (of thermodynamics) method as applied to a single effect absorption refrigeration cycle. Two different sets of working fluids: LiBr-H2O and NH3-H2O solution are considered, and a method to calculate the entropy of both working fluids is offered. The total exergy destruction in the system as a percentage of the exergy input from ...
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Environmental thermodynamic limitations on global human population
This paper examines, from a thermodynamic point of view, how many people the Earth can support. The maximum human population allowed by the natural earth ranges from 300 million millions to 1,700 million millions and will not exceed 1,300 million millions if an ambient temperature of 300 K is accepted. A further increase in population number is obtained for macro-engineered earth when heat pumps ...
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Thermodynamic analysis of an air solar collector
The paper presents the experimental study of an air solar installation with a collecting area AC = 4.2m² and variable working fluid flow rate in the range 0.02÷0.06 kg/s. The experimental data are processed statistically through thermodynamic analysis, using energy (semi-empirical) and exergy methods. The aim of the paper is to establish the optimal air flow rate through this solar thermal system ...
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