Research On The Performance Of Assembled Floor Radiant Heating Syste

As the proportion of building energy consumption in total social energy consumption increases year by year,building energy-saving technology has become an important issue facing the development of the construction industry;At the same time,people’s demand for comfort in the building environment is constantly increasing,and traditional heating forms can no longer meet the demand.In this context,floor radiation heating systems have been widely studied and applied in many countries due to their advantages such as comfort and low energy consumption.At present,in China,the actual engineering of this system mostly adopts concrete filled structures,which have problems such as complex construction processes,difficult maintenance,and high thermal inertia.The relevant engineering design software and methods are also not perfect enough.In response to the problems existing in traditional floor radiation heating systems,this study combines prefabricated flooring with radiation heating systems to study the device structure,working principle,heating effect,and economy of a prefabricated low-temperature hot water floor radiation heating system.Firstly,this article introduces the prefabricated floor radiation heating system and its internal structure.A mathematical model is used to analyze the four heat transfer stages and their working principles that occur between the hot water and the inner wall of the water supply pipe,between the inner wall of the water supply pipe and the outer wall,between the outer wall of the water supply pipe and each temperature maintaining structural layer in the system,and between the indoor floor surface and the heating room during the heating period of the system,And it provides a theoretical basis for subsequent experimental simulations.By building an experimental platform,heating experiments were conducted on a prefabricated floor radiation heating system,and heating experimental data were recorded,statistically analyzed,and simulated using Airpak software for indoor heating effects.On the basis of verifying the feasibility of the model using experimental data,by combining comparative experimental data and numerical simulation results,the impact of outdoor environmental factors such as external windows,sunlight,external doors,and corridors on indoor heating efficiency is analyzed.The amplitude of indoor temperature increase with the increase of water supply temperature is smaller than that of water supply temperature,and the increase of indoor temperature has a delay,At the same time,it was also found that extruded polystyrene insulation panels can weaken the impact of outdoor humidity on the indoor environment.Based on this,a comparison and economic analysis was conducted between prefabricated floor heating systems and other traditional heating methods in terms of initial investment and operating costs.It was found that prefabricated floor heating also has certain advantages compared to other traditional heating methods in terms of initial investment and operating costs,meeting the economic requirements,Suggestions and references for practical indoor heating applications have been proposed.Secondly,this article uses Fluent fluid simulation software to numerically simulate the heat transfer process of traditional floor radiant heating systems and prefabricated floor radiant heating systems with and without the addition of phase change materials,respectively.The results show that adding phase-change materials to the assembled floor radiant heating system can not only uniform the temperature distribution in the heating room,reduce the temperature fluctuation,improve the Thermal comfort of the human body,but also cut the peak and fill the valley,save heating power,so as to achieve the goal of building economy and energy conservation.By using fluid simulation methods,the effects of phase change materials,different insulation materials,and different water supply temperatures on the heat transfer process within the structure of a floor radiant heating system were studied.The conclusion is drawn that the combination of phase change materials,the selection of a structure that combines high thermal conductivity materials with low thermal conductivity insulation materials,and the difference between water supply temperature and material phase change temperature should be within an appropriate range.This study comprehensively elucidates the heating mechanism and influencing factors of the prefabricated floor radiation heating system through experimental and simulation analysis results,demonstrates the economic feasibility of the system,and proposes suggestions for further improvement of the system,such as combining phase change materials,providing experimental and theoretical basis for relevant engineering applications and promotion.