A computational model for a rocket mass heater
| Autor: | Mark Schumack |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.product_category business.industry 020209 energy Energy Engineering and Power Technology Mechanical engineering 02 engineering and technology Mechanics Masonry heater Thermal conduction Combustion Industrial and Manufacturing Engineering Convection heater Physics::Fluid Dynamics Rocket mass heater Heat transfer 0202 electrical engineering electronic engineering information engineering Duct (flow) Thermal mass business |
| Zdroj: | Applied Thermal Engineering. 93:763-778 |
| ISSN: | 1359-4311 |
| DOI: | 10.1016/j.applthermaleng.2015.10.035 |
| Popis: | A simple one dimensional pseudo-steady computational model of a rocket mass heater is presented. A rocket mass heater is a space heating device that utilizes an insulated “J-tube” to promote complete combustion of burning wood, a steel barrel to act as a heat radiator, and a thermal mass usually shaped into a bench that stores heat from the exhaust before the combustion gases are released to the atmosphere. The gas model is based on fundamental relationships for steady compressible flow through one-dimensional geometry and is coupled to an unsteady finite difference model for two dimensional heat conduction in the thermal mass, which is modeled as a hollow cylinder. The model accounts for detailed heat transfer effects and fluid frictional losses, and is able to predict efficiency, flow rate, and spatial variations in temperature and pressure as functions of key parameters such as burn rate, thermal mass volume and length, duct routing details, and chimney height. Key results demonstrate how insufficient chimney height and narrow barrel clearances can threaten heater performance, how a system damper and increasing duct length can improve heater efficiency, and that axial temperature variation in the mass is small compared to radial gradients. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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