Innovative Hybrid Condensing Radiant System for Industrial Heating: An Energy and Economic Analysis

Noro, Marco; Mancin, Simone; Busato, Filippo; Cerboni, Francesco

doi:10.3390/su15043037

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…PV systems mainly support distributed energy generation to achieve effective integration into grids and micro-grids. There are a large number of studies one could cite as examples, which address the combination of ground-coupled heat pumps for upgraded post-COVID-19 ventilation systems [3], rooftop PV combination with hybrid condensing radiant tubes' heating systems [4], and incorporation into residential buildings with air-to-water heat pump systems [5]. Accelerated vehicle electrification is pushing for further expansion of PV systems.…”

Section: Photovoltaic Systems Applicationsmentioning

confidence: 99%

Comparative Performance Analysis of a Grid-Connected Photovoltaic Plant in Central Greece after Several Years of Operation Using Neural Networks

Ρουμπακιάς

Stamatelos

2023

Sustainability

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The increasing installed volume of grid-connected PV systems in modern electricity networks induces variability and uncertainty factors which must be addressed from several different viewpoints, including systems’ protection and management. This study aims to estimate the actual performance and degradation of photovoltaic (PV) parks in Central Greece after several years of operation. Monitoring data over several years are analyzed and filtered, the performance ratio and normalized efficiency are computed, and five different ANNs are employed: (i) a feed-forward network (one hidden layer); (ii) a deep feed-forward network (two hidden layers); (iii) a recurrent neural network; (iv) a cascade-forward network; and (v) a nonlinear autoregressive network. The following inputs are employed: in-plane irradiance; backsheet panel temperature; airmass; clearness index; and DC voltage of the inverter. Monitoring data from an 8-year operation of a grid-connected PV system are employed for training, testing, and validation of these networks. They act as a baseline, built from the first year, and the computed metrics act as indicators of faults or degradation. Best accuracy is reached with the DFFNN. The ANNs are trained with data from the first year of operation, and output prediction is carried out for the remaining years. Annual electricity generation exceeds 1600 kWh /kWp, and MAPE values show an increasing trend over the years. This fact indicates a possible change in PV performance.

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Section: Photovoltaic Systems Applicationsmentioning

confidence: 99%

Comparative Performance Analysis of a Grid-Connected Photovoltaic Plant in Central Greece after Several Years of Operation Using Neural Networks

Ρουμπακιάς

Stamatelos

2023

Sustainability

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“…In recent times, several innovative papers on radiant heating have also been published. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Wu et al 1 investigated the thermal responses and the thermal environmental parameters of various indoor and outdoor spaces to compare the thermal comfort of these spaces. In the study by Zhang et al 2 a two-dimensional numerical model of the floor heating system combined with the phase-change materials has been developed.…”

Section: Introductionmentioning

confidence: 99%

“…Verma et al 8 employed the artificial neural network for the development of a simplified heat flux model for radiant floor cooling and heating systems. Noro et al 9 modelled an innovative hybrid condensing radiant tubes heating system for industrial buildings in three climatic zones of Italy. Dynamic simulation software was used to explore the thermal conditions within the inner space.…”

Section: Introductionmentioning

confidence: 99%

Thermal balance of human body at local workplace

Ficker

2024

Indoor and Built Environment

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Building thermal technologists are occasionally faced with the problem of creating thermal balance in space-limited places situated in a very large cold hall whose complete heating would not be economical. A typical case may be a small local workplace in a large industrial hall. Such a workplace is usually arranged for temporary and intermittent work of one or several persons. Portable electric radiant panels as sources of heat for local workplaces seem to be convenient due to their directional heat radiation. In practice, local heating is solved intuitively using the method of trial and error, although there may be a chance to develop a numerical method to solve this problem exactly. In this paper, a new computational method is presented to create thermal balance in a local workplace situated in a large cold hall. The method intensively employs view factors in combination with the algebraic radiosity method and metabolic heat output of working persons. Although the radiant heat flows of the radiant panels represent dominant parts of their heat powers, the complete energy characterization of the panels requires adding heat transfers caused by convection. The convective heat transports have been estimated using the Rayleigh and Nusselt numbers.

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Solution of the Heat and Mass Transfer Problem for Soil Radiant Heating Conditions Using the Error Function

Pavlov,

Karpov,

Vafaeva

et al. 2024

E3S Web Conf.

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Achieving high yields of agricultural crops requires the ability to predict soil temperature and moisture regimes, taking into account soil heating technology. The object of study is soil heated by a ceiling infrared emitter. The subject of study is one-dimensional non-stationary fields of soil moisture content and temperature. The objective of the study is to predict soil temperature and moisture regimes under radiant heating conditions. Research methods: analytical methods for solving differential equations of heat and mass transfer using the error function. Research results: the top 5 mm layer of milled peat with an initial moisture content of 3.7 kg/kg will reach a final moisture content of 1.0 kg/kg in about 6 hours during infrared drying. As a result of radiant heating, the soil will heat up from an initial temperature of 5 ℃ to a final temperature of 20 ℃ in approximately 3 hours. The analytical solution of the mass transfer differential equation can be used for theoretical studies of drying of capillary-porous materials, for example, to determine the drying period or the thickness of the material layer that will dry to a given final moisture content. The analytical solution of the heat transfer differential equation can be used to control the operating mode of the infrared radiation source, for example, to determine the periods of its operation and switching off in case the soil surface temperature reaches the maximum (critical) value. The mathematical solutions considered in the article do not take into account the cross processes of heat and mass transfer, which is a promising direction for further scientific research.

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Innovative Hybrid Condensing Radiant System for Industrial Heating: An Energy and Economic Analysis

Cited by 4 publications

References 32 publications

Comparative Performance Analysis of a Grid-Connected Photovoltaic Plant in Central Greece after Several Years of Operation Using Neural Networks

Comparative Performance Analysis of a Grid-Connected Photovoltaic Plant in Central Greece after Several Years of Operation Using Neural Networks

Thermal balance of human body at local workplace

Solution of the Heat and Mass Transfer Problem for Soil Radiant Heating Conditions Using the Error Function

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