Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Ding, Ding; He, Wenjing; Liu, Chunlu

doi:10.3390/en14030618

Cited by 11 publications

(10 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To solve the problems of conventional metal-flat and glass-tube solar collectors such as short service life and relatively high cost, scholars have devoted considerable efforts toward investigating long-life and low-cost solar thermal absorption materials that can be easily integrated into building construction, especially in developing countries. Therefore, a flat-plate collector made of vanadium-titanium black ceramic was invented and implemented (Ding et al, 2021). The ceramic coating has an absorption coefficient of 0.93-0.97, which barely decays with time (Żukowski et al, 2019).…”

Section: Ceramic-based Collectorsmentioning

confidence: 99%

Integration of Active Solar Thermal Technologies in Greenhouses: A Mini Review

Ding

2021

Front. Energy Res.

Self Cite

View full text Add to dashboard Cite

Traditional agricultural greenhouses have been used to grow vegetables in the winter without any auxiliary heating. However, crop production is highly influenced by soil and air temperatures, humidity, and solar radiation. The aim of this paper is to review the recent active solar thermal technologies that help reduce the energy demand for greenhouse climate control and achieve intensive crop production. The review is categorized into the following topics: 1) locations for collector installation; 2) discussion on the different types of solar collectors, which include metal-based, glass-based, ceramic-based, plastic-based, and hybrid photovoltaic/thermal types for greenhouse applications; 3) heat release systems in active greenhouses in terms of basal heating, backwall heating, and air heating systems; and 4) short-term and long-term heat storage systems for greenhouses. Future studies on active solar greenhouses might focus on microclimate prediction, long-term heat storage, and system optimization.

show abstract

Section: Ceramic-based Collectorsmentioning

confidence: 99%

Integration of Active Solar Thermal Technologies in Greenhouses: A Mini Review

Ding

2021

Front. Energy Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A mathematical model was provided to optimize the performance of VTBC. An increase in the aperture area of the collector from 1 to 8 m 2 reduced the instantaneous collector efficiency by 7.52% 20 . Some additional studies of passive thermal systems were covered in the literature 21–23 .…”

Section: Introductionmentioning

confidence: 99%

Developing a thermodynamic model for the circulating air using an opaque system

Dhaundiyal,

Toth

2023

Energy Science & Engineering

View full text Add to dashboard Cite

The paper focuses on energy modelling that involves a concatenated structure of a linear time‐invariant system. A block‐structured (BS) technique was adopted for a nonlinear system identification. Using the superimposition principle, the model mapped the thermodynamic state variables as an indirect function of time to the output function. The available energy and degradation of solar radiation are determined through a black box model. For testing and validation purposes, a solar collector with recirculating air was considered. The basic principle is to establish a relation between state variables and the performance parameters, without invoking the conventional thermodynamic relationship between them. The output of the model was compared with the validation data to ensure whether or not there was any affinity between them. The sigmoidal, wavenet, and polynomial forms of nonlinearity provided a good fit to the experimental dataset. The mean absolute percentage error encountered while estimating the collector efficiency was noticed to vary from −4.85 × 10−03% to 1.22 × 10−03%. Similarly, it falls in the domain of −4.73 × 10−04% to 7.78 × 10−02% for the second law efficiency. The maximum heat loss rate (BS model) obtained across the first and second passages of the solar air collector was 235.41 and 218.19 W at the air mass flow rate of 8.10 g/s, which is congruent to the validation dataset.

show abstract

“…Solar energy is a promising renewable energy source that can be used for facing critical problems like the increasing energy needs [1], fossil fuel depletion [2] and the decarbonization of our society [3]. There are various solar collectors like typical flat plate collectors [4], improved flat plate collectors [5], heat pipe solar collectors [6] and solar passive systems in buildings [7]. Solar concentrating technology is an interesting idea for producing thermal energy at high-temperature levels and so to feed various energy systems with high exergy rates [8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Novel CO2 Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors

Bellos

Tzivanidis

2021

ASI

View full text Add to dashboard Cite

The objective of the present study is the detailed investigation and optimization of a transcritical organic Rankine cycle operating with CO2. The novelty of the present system is that the CO2 is warmed up inside a solar parabolic trough collector and there is not a secondary circuit between the solar collector and the CO2. Therefore, the examined configuration presents increased performance due to the higher operating temperatures of the working fluid in the turbine inlet. The system is studied parametrically and it is optimized by investigating different pressure and temperature level in the turbine inlet. The simulation is performed with a validated mathematical model that has been developed in Engineering Equation Solver software. According to the results, the optimum turbine inlet temperature is ranged from 713 up to 847 K, while the higher pressure in the turbine inlet enhances electricity production. In the default scenario (turbine inlet at 800 K and turbine pressure at 200 bar), the system efficiency is found 24.27% with solar irradiation at 800 W/m2. A dynamic investigation of the system for Athens (Greece) climate proved that the yearly efficiency of the unit is 19.80%, the simple payback period of the investment is 7.88 years, and the yearly CO2 emissions avoidance is 48.7 tones.

show abstract

Mathematical Modeling and Optimization of Vanadium-Titanium Black Ceramic Solar Collectors

Cited by 11 publications

References 44 publications

Integration of Active Solar Thermal Technologies in Greenhouses: A Mini Review

Integration of Active Solar Thermal Technologies in Greenhouses: A Mini Review

Developing a thermodynamic model for the circulating air using an opaque system

Investigation of a Novel CO2 Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors

Contact Info

Product

Resources

About