Thermodynamic evaluations of solar cooling cogeneration cycle using NaSCN–NH3 mixture

2017 ◽  
Vol 53 (3) ◽  
pp. 267-275 ◽  
Author(s):  
R. Shankar ◽  
T. Srinivas ◽  
B. V. Reddy
Keyword(s):  
Solar Cooling ◽  
Cogeneration Cycle

Investigation on aqua-ammonia based solar cooling cogeneration plant

2016 ◽  
Vol 27 (1) ◽  
pp. 36-44 ◽  
Author(s):  
R. Shankar ◽  
T. Srinivas
Keyword(s):  
Climatic Conditions ◽  
Working Fluid ◽  
Fluid Mixture ◽  
Content Type ◽  
Power Cycle ◽  
Solar Cooling ◽  
Atmosphere Temperature ◽  
Solar Thermal Cooling ◽  
Thermal Cooling ◽  
Cogeneration Cycle

Purpose – The proposed solar thermal cooling cogeneration cycle is well suited for industrial as well as domestic needs and it eliminates need of electricity for refrigeration system. The purpose of this paper is to integrate power and cooling to minimize the energy usage. Design/methodology/approach – The proposed plant has double turbine with superheater and reheater to extract more energy, operating on single generator. The saturated refrigerant from the exit of the generator is used to run the primary turbine and the exit mass of refrigerant is split into 50:50 cooling to power ratio. Findings – It produces additional power of 24 kW at absorber concentration of 0.42 and turbine inlet concentration of 0.95, with separator temperature of 145°C and atmosphere temperature of 30°C. Research limitations/implications – The proposed cooling cogeneration cycle is possible to run on all the refrigerant working fluid mixture and it overcomes the problem of Goswami cycle which is not possible to run in hot climatic countries. Originality/value – The cycle can operate individually as refrigeration cycle, power cycle and both and it will run all climatic conditions.

scholarly journals Development and Results from Application of PCM-Based Storage Tanks in a Solar Thermal Comfort System of an Institutional Building—A Case Study

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3877 ◽  
Author(s):  
F. Javier Batlles ◽  
Bartosz Gil ◽  
Svetlana Ushak ◽  
Jacek Kasperski ◽  
Marcos Luján ◽  
...  
Keyword(s):  
Phase Change Materials ◽  
Exergy Analysis ◽  
Heating System ◽  
Storage Tanks ◽  
Research Groups ◽  
Energy Research ◽  
Solar Cooling ◽  
Daily Energy ◽  
The University

An important element of a solar installation is the storage tank. When properly selected and operated, it can bring numerous benefits. The presented research relates to a project that is implemented at the Solar Energy Research Center of the University of Almeria in Spain. In order to improve the operation of the solar cooling and heating system of the Center, it was upgraded with two newly designed storage tanks filled with phase change materials (PCM). As a result of design works, commercial material S10 was selected for the accumulation of cold, and S46 for the accumulation of heat, in an amount of 85% and 15%, respectively. The article presents in detail the process of selecting the PCM material, designing the installation, experimental research, and exergy analysis. Individual tasks were carried out by research groups cooperating under the PCMSOL EUROPEAN PROJECT. Results of tests conducted on the constructed installation indicate that daily energy saving when using a solar chiller with PCM tanks amounts to 40% during the cooling season.

Sorption solar cooling

1994 ◽  
Vol 5 (1-4) ◽  
pp. 422-429 ◽  
Author(s):  
F. Meunier
Keyword(s):  
Solar Cooling

scholarly journals On realistic size equivalence and shape of spheroidal Saharan mineral dust particles applied in solar and thermal radiative transfer calculations

2011 ◽  
Vol 11 (9) ◽  
pp. 4469-4490 ◽  
Author(s):  
S. Otto ◽  
T. Trautmann ◽  
M. Wendisch
Keyword(s):  
Land Surface ◽  
Mineral Dust ◽  
Single Scattering ◽  
Radiative Heating ◽  
Dust Particles ◽  
Axis Ratio ◽  
Solar Cooling ◽  
Prolate Shape ◽  
Spheroidal Model

Abstract. Realistic size equivalence and shape of Saharan mineral dust particles are derived from in-situ particle, lidar and sun photometer measurements during SAMUM-1 in Morocco (19 May 2006), dealing with measured size- and altitude-resolved axis ratio distributions of assumed spheroidal model particles. The data were applied in optical property, radiative effect, forcing and heating effect simulations to quantify the realistic impact of particle non-sphericity. It turned out that volume-to-surface equivalent spheroids with prolate shape are most realistic: particle non-sphericity only slightly affects single scattering albedo and asymmetry parameter but may enhance extinction coefficient by up to 10 %. At the bottom of the atmosphere (BOA) the Saharan mineral dust always leads to a loss of solar radiation, while the sign of the forcing at the top of the atmosphere (TOA) depends on surface albedo: solar cooling/warming over a mean ocean/land surface. In the thermal spectral range the dust inhibits the emission of radiation to space and warms the BOA. The most realistic case of particle non-sphericity causes changes of total (solar plus thermal) forcing by 55/5 % at the TOA over ocean/land and 15 % at the BOA over both land and ocean and enhances total radiative heating within the dust plume by up to 20 %. Large dust particles significantly contribute to all the radiative effects reported. They strongly enhance the absorbing properties and forward scattering in the solar and increase predominantly, e.g., the total TOA forcing of the dust over land.

scholarly journals Thermoacoustic Solar Cooling for Domestic Usage Sizing Software Part (I)

2012 ◽  
Vol 18 ◽  
pp. 119-130 ◽  
Author(s):  
Tareq Konaina ◽  
Nasser Yassen
Keyword(s):  
Solar Cooling

scholarly journals COOLFACADE: State-of-the-art review and evaluation of solar cooling technologies on their potential for façade integration

2019 ◽  
Vol 101 ◽  
pp. 395-414 ◽  
Author(s):  
Alejandro Prieto ◽  
Ulrich Knaack ◽  
Thomas Auer ◽  
Tillmann Klein
Keyword(s):  
State Of The Art ◽  
Solar Cooling

scholarly journals A solar air-cooled high efficiency absorption system in dry hot climates: Reduction of water consumption and environmental impact

2018 ◽  
Vol 22 (5) ◽  
pp. 2151-2162
Author(s):  
Jose Marcos ◽  
Raquel Lizarte ◽  
Fernando Varela ◽  
Maria Palacios-Lorenzo ◽  
Ana Blanco-Marigorta
Keyword(s):  
Water Consumption ◽  
High Efficiency ◽  
Cooling System ◽  
Double Effect ◽  
Environmental Benefits ◽  
Absorption System ◽  
Solar Cooling ◽  
Single Effect ◽  
Solar Cooling System

A solar cooling system with an optimized air-cooled double-effect water/LiBr absorption machine is proposed as a sustainable alternative to meet cooling demands in dry hot climates. This system allows eliminating the cooling towers in those regions of the planet where water is scarce. This work analyses the environmental benefits of this air-cooled system, as well as its environmental foot-prints, compared to a solar water-cooled single effect. In this regard, a methodology has been applied to calculate the annual saving in water consumption produced in a case study: a hospital located in Almer?a, in South of Spain. Further-more, the reduction in energy consumption and CO2 emissions is also quantified since this machine can be driven by solar energy and with higher efficiency than those of single effect.

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