Abstract
An algorithm for modelling and numerical simulation of the three dimensional conjugate heat transfer in slab-embedded snow melting and freeze protecting systems is developed. The influence of the climate conditions on the heat transfer in the constructions is modelled according to the correspondent design method of ASHRAE. The models are verified and solved numerically via finite volume method for a road embedded hydronic installation at different piping configurations. The fluid flow parameters and temperature fields in the construction are obtained at steady state climate conditions, hardest for 95 % of the wintertime for the region. An analysis of the efficiency of the modelled configurations is implemented based on the computed snow-free area ratio of the road surfaces.
Highlights
The finite element simulation of the heat transfer in floor constructions with embedded radiant heating allows detailed information about the temperature field of the heat exchanging surfaces at the design and verification tasks [1 - 6]
The influence of the climate conditions on the heat transfer in the constructions is modelled according to the correspondent design method of ASHRAE
The fluid flow parameters and temperature fields in the construction are obtained at steady state climate conditions, hardest for 95 % of the wintertime for the region
Summary
The finite element simulation of the heat transfer in floor constructions with embedded radiant heating allows detailed information about the temperature field of the heat exchanging surfaces at the design and verification tasks [1 - 6]. The heat transfer between the floor surfaces and the room environments at indoor installations is usually modelled via Robin boundary conditions at accepted room temperatures and heat transfer coefficients [1]. They are determined according to the well-known methods for design of radiant floor heating [7]. Outdoor radiant floor systems are used in the recent decades for snow melting and ice protecting of ways, parks and stairs Such hydronic installations are suitable for utilisation of waste heat of flows with relatively low temperatures [8]. The aim of the present study is a future developing and applying of this algorithm for analysis of the efficiency of floor-embedded snow melting and freeze protecting systems, taking into account the quasi-stationary heat transfer at severe climatic conditions
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