Modelling and simulation of dryer system

Abstract

Drying is one of the complex and highly energy consuming process unit operation used in many industry such as textile, paper, chemical, pharmaceuticals, agro and food processing, sugar, etc. Significant R&D efforts are underway in last more than a decade to enhance dryer technology and operations to enhance its energy efficiency. A mathematical modelling and simulation framework is developed on the MATLAB-SIMULINK platform for rotary dryer. The model is semi-empirical based on the first principles using mass balance and moisture balance equations amongst the vegetables and hot air. Later, a mathematical model for textile dryer machine has been developed by modifying the rotary dryer model. Keywords-Discretized model, mathematical model of rotary dryer, modelling of textile dryer

Life cycle environmental and economic sustainability of Stirling engine micro‐CHP systems

“…In 2014, the average temperature-adjusted consumptiono f natural gas per UK household was 14 263 kWh. [41] Assuming an average gas boiler efficiency of 85 %, this implies ah eat demand of 12 124 kWh yr À1 .T herefore,i nl ine with the manufacturer'se xpectationst hat the system will supply 100 %o f domestic heat demand, [35] with an annual heat generation assumedt ob e1 2124 kWh. Assuming heat and electrical efficiencies of 77 %a nd 13 % ( Table 1), respectively,t his amount of heat will cogenerate 2047 kWh of electricity per year.…”

“…However, annual servicing is recommended, which includes af ull inspection of the system. [35] As material and energy use for inspectioni sn egligible,o nly the transporto fa ne ngineer to the site and back is assumed in this study.F or this,a na nnual round trip of 200 km by avan is assumed.…”

“…[51][52][53] Further, ac ombination boiler is assumed (i.e., providing both space and water heating), which is now the most popular type in the UK. [35,51,54] As for the micro-CHP unit, the natural gas boiler is assumed to supply 100 %o fs pace heating and operates at a seasonale fficiency of 90 %. [50] At ypicald esign capacity of 24 kW th is assumed.…”

Determination of drying behaviour in industrial type convectional dryer and mathematical modelling

“…Baxi et al [3] modified the semi-empirical model based on mass and moisture balancing equations between vegetables and drying air in a MATLAB-Simulink environment for rotary type dryers and developed it. They then compared these with stenters [3].…”

“…Baxi et al [3] modified the semi-empirical model based on mass and moisture balancing equations between vegetables and drying air in a MATLAB-Simulink environment for rotary type dryers and developed it. They then compared these with stenters [3]. Ghali et al, [4] presented a numerical model in order to simulate the heat and mass transfer during the drying process of fabrics.…”