Operation optimization of prefabricated light modular radiant heating system: Thermal resistance analysis and numerical study

Abstract

The utilization of prefabricated light modular radiant heating system has demonstrated significant increases in heat transfer efficiency and energy conservation capabilities. Within prefabricated building construction, this new heating method presents an opportunity for the development of comprehensive facilities. The parameters for evaluating the effectiveness of such a system are the upper surface layer’s heat flux and temperature. In this paper, thermal resistance analysis calculation based on a simplified model for this unique radiant heating system analysis is presented with the heat transfer mechanism’s evaluation. The results obtained from thermal resistance analysis calculation and numerical simulation indicate that the thermal resistance analysis method is highly accurate with temperature discrepancies ranging from 0.44 °C to −0.44 °C and a heat flux discrepancy of less than 7.54%, which can meet the requirements of practical engineering applications, suggesting a foundation for the prefabricated radiant heating system

Keywords

radiant heating system / thermal resistance analysis / simplified model / numerical simulation / heat flux / temperature

References

[[1]] Liang R-b, Wang P, Zhou C, et al.. Thermal performance study of an active solar building façade with specific PV/T hybrid modules. Energy, 2020, 191: 116532, J]

[[2]] Mou D, Cao B, Zhu Y-xin. Field study on thermal comfort of naturally ventilated residences in southwest China. Journal of Central South University, 2022, 29(7): 2377-2387, J]

[[3]] Shaikh P H, Bin Mohd Nor N, Nallagownden P, et al.. A review on optimized control systems for building energy and comfort management of smart sustainable buildings. Renewable and Sustainable Energy Reviews, 2014, 34: 409-429, J]

[[4]] Souley Agbodjan Y, Liu Z-q, Wang J-q, et al.. Modeling and optimization of a multi-carrier renewable energy system for zero-energy consumption buildings. Journal of Central South University, 2022, 29(7): 2330-2345, J]

[[5]] Zhang W, Liu Y, Ye Z-q, et al.. Porous nitrogen-doped FeP/C nanofibers as promising anode for potassium-ion batteries. Journal of Central South University, 2023, 30(10): 3248-3259, J]

[[6]] Wei N, Zheng W-x, Zhang N, et al.. Field study of seasonal thermal comfort and adaptive behavior for occupants in residential buildings of Xi’an, China. Journal of Central South University, 2022, 29(7): 2403-2414, J]

[[7]] Veillette D, Rouleau J, Gosselin L. Impact of window-to-wall ratio on heating demand and thermal comfort when considering a variety of occupant behavior profiles. Frontiers in Sustainable Cities, 2021, 3: 700794, J]

[[8]] Patyn C, Deconinck G. Dynamic mode decomposition for nonintrusive and robust model predictive control of residential heating systems. Energy and Buildings, 2022, 254: 111450, J]

[[9]] Krajčík M, Arici M, Ma Z-jun. Trends in research of heating, ventilation and air conditioning and hot water systems in building retrofits: Integration of review studies. Journal of Building Engineering, 2023, 76: 107426, J]

[[10]] Akgüç A, Yilmaz A Z. Determining HVAC system retrofit measures to improve cost-optimum energy efficiency level of high-rise residential buildings. Journal of Building Engineering, 2022, 54: 104631, J]

[[11]] Du K, Wu H-j, Guo Y-l, et al.. Improving cooling capacity of condensation-free radiant cooling for low-emissivity chilled ceiling via adaptive double-skin infrared membranes. Frontiers in Thermal Engineering, 2022, 2: 905015, J]

[[12]] Talebi B, Mirzaei P A, Bastani A, et al.. A review of district heating systems: Modeling and optimization. Frontiers in Built Environment, 2016, 2: 22, J]

[[13]] Chang J-h, Liu K, Lin S-y, et al.. Solution-processed perovskite solar cells. Journal of Central South University, 2020, 27(4): 1104-1133, J]

[[14]] Ma D-c, Lan Fen. Numerical simulation analysis on multi-layer low-temperature heating method of asphalt pavement in hot in-place recycling. Journal of Central South University, 2020, 27(12): 3793-3806, J]

[[15]] Liu Z-g, Yang X-h, Ali H M, et al.. Multi-objective optimizations and multi-criteria assessments for a nanofluid-aided geothermal PV hybrid system. Energy Reports, 2023, 9: 96-113, J]

[[16]] Wen S B, Bhaskar A. Improving the performance of solar thermophotovoltaic (STPV) cells with spectral selected absorbers and small apertured radiation shields. International Journal of Heat and Mass Transfer, 2022, 184: 122266, J]

[[17]] Du Z, Liu G, Huang X-y, et al.. Numerical studies on a fin-foam composite structure towards improving melting phase change. International Journal of Heat and Mass Transfer, 2023, 208: 124076, J]

[[18]] Huang X-y, Li F-f, Xiao T, et al.. Investigation and optimization of solidification performance of a triplex-tube latent heat thermal energy storage system by rotational mechanism. Applied Energy, 2023, 331: 120435, J]

[[19]] Li F-f, Huang X-y, Li Y-j, et al.. Application and analysis of flip mechanism in the melting process of a triplex-tube latent heat energy storage unit. Energy Reports, 2023, 9: 3989-4004, J]

[[20]] Liu G, Du Z, Xiao T, et al.. Design and assessments on a hybrid pin fin-metal foam structure towards enhancing melting heat transfer: An experimental study. International Journal of Thermal Sciences, 2022, 182: 107809, J]

[[21]] Liu G, Xiao T, Guo J-f, et al.. Melting and solidification of phase change materials in metal foam filled thermal energy storage tank: Evaluation on gradient in pore structure. Applied Thermal Engineering, 2022, 212: 118564, J]

[[22]] Su Y-q, Gong F-q, Luo S, et al.. Experimental study on energy storage and dissipation characteristics of granite under two-dimensional compression with constant confining pressure. Journal of Central South University, 2021, 28(3): 848-865, J]

[[23]] Xiao T, Liu G, Guo J-f, et al.. Effect of metal foam on improving solid-liquid phase change in a multichannel thermal storage tank. Sustainable Energy Technologies and Assessments, 2022, 53: 102533, J]

[[24]] Junasová B, Krajčík M, Šikula O, et al.. Adapting the construction of radiant heating and cooling systems for building retrofit. Energy and Buildings, 2022, 268: 112228, J]

[[25]] Zhang C, Pomianowski M, Heiselberg P K, et al.. A review of integrated radiant heating/cooling with ventilation systems-Thermal comfort and indoor air quality. Energy and Buildings, 2020, 223: 110094, J]

[[26]] González B, Prieto M M. Radiant heating floors with PCM bands for thermal energy storage: A numerical analysis. International Journal of Thermal Sciences, 2021, 162: 106803, J]

[[27]] Lu Y-y, Dong J-k, Liu Jing. Zonal modelling for thermal and energy performance of large space buildings: A review. Renewable and Sustainable Energy Reviews, 2020, 133: 110241, J]

[[28]] Joe J, Karava P. A model predictive control strategy to optimize the performance of radiant floor heating and cooling systems in office buildings. Applied Energy, 2019, 245: 65-77, J]

[[29]] Wang M-j, Li P-p, Liu W-jie. Generic mathematical formulation of the total heat transfer coefficients between heated radiant floor surfaces and rooms. Building and Environment, 2022, 211: 108701, J]

[[30]] Zhang Y, Zaho C-b, Olofsson T, et al.. Field measurements and numerical analysis on operating modes of a radiant floor heating aided by a warm air system in a large single-zone church. Energy and Buildings, 2022, 255: 111646, J]

[[31]] Kim J, Tzempelikos A, Braun J E. Review of modelling approaches for passive ceiling cooling systems. Journal of Building Performance Simulation, 2015, 8(3): 145-172, J]

[[32]] Zhao K, Liu X-h, Jiang Yi. Dynamic performance of water-based radiant floors during start-up and high-intensity solar radiation. Solar Energy, 2014, 101: 232-244, J]

[[33]] Romaní J, Pérez G, De Gracia A. Experimental evaluation of a heating radiant wall coupled to a ground source heat pump. Renewable Energy, 2017, 105: 520-529, J]

[[34]] Koca A, Çetin G. Experimental investigation on the heat transfer coefficients of radiant heating systems: Wall, ceiling and wall-ceiling integration. Energy and Buildings, 2017, 148: 311-326, J]

[[35]] Hooshmand S M, Zhang H, Javidanfar H, et al.. A review of local radiant heating systems and their effects on thermal comfort and sensation. Energy and Buildings, 2023, 296: 113331, J]

[[36]] Rhee K N, Olesen B W, Kim K W. Ten questions about radiant heating and cooling systems. Building and Environment, 2017, 112: 367-381, J]

[[37]] Zhang L, Liu X-h, Jiang Yi. Simplified calculation for cooling/heating capacity, surface temperature distribution of radiant floor. Energy and Buildings, 2012, 55: 397-404, J]

[[38]] Ahn B C, Song J Y. Control characteristics and heating performance analysis of automatic thermostatic valves for radiant slab heating system in residential apartments. Energy, 2010, 35(4): 1615-1624, J]

[[39]] Krusaa M R, Hviid C A. Combining suspended radiant ceiling with diffuse ventilation—Numerical performance analysis of low-energy office space in a temperate climate. Journal of Building Engineering, 2021, 38: 102161, J]

[[40]] Wu X-z, Zhao J-n, Olesen B W, et al.. A new simplified model to calculate surface temperature and heat transfer of radiant floor heating and cooling systems. Energy and Buildings, 2015, 105: 285-293, J]

[[41]] Ding P, Li Y-r, Long E-s, et al.. Study on heating capacity and heat loss of capillary radiant floor heating systems. Applied Thermal Engineering, 2020, 165: 114618, J]

[[42]] Babiak J, Olesen B W, Petráš D. . Low temperature heating and high temperature cooling: REHVA GUIDEBOOK No 7, 2007 Belgium REHVA [M]

[[43]] Wang X-l, Zhang W-k, Li Q-q, et al.. An analytical method to estimate temperature distribution of typical radiant floor cooling systems with internal heat radiation. Energy Exploration & Exploitation, 2021, 39(4): 1283-1305, J]

[[44]] Olesen B W. Radiant floor heating in theory and practice. ASHRAE Journal, 2002, 44(7): 19-26 [J]

[[45]] Dawe M, Raftery P, Woolley J, et al.. Comparison of mean radiant and air temperatures in mechanically-conditioned commercial buildings from over 200, 000 field and laboratory measurements. Energy and Buildings, 2020, 206: 109582, J]

[[46]] JGJ142—2012. Technical specification for radiant heating and cooling [S]. (in Chinese)

[[47]] Air-conditioning engineers, ASHRAE handbook: fundamentals [M]. SI edition. ASHRAE, 2013.

[[48]] Yu T, Heiselberg P, Lei B, et al.. Validation and modification of modeling thermally activated building systems (TABS) using EnergyPlus. Building Simulation, 2014, 7(6): 615-627, J]

[[49]] KOSCHENZ B L M. Thermoaktive bauteilsysteme Tabs, EMPA Energiesysteme/Haustechnik [M]. Zurich, 2000 (in German).

[[50]] Cholewa T, Anasiewicz R, Siuta-Olcha A, et al.. On the heat transfer coefficients between heated/cooled radiant ceiling and room. Applied Thermal Engineering, 2017, 117: 76-84, J]

[[51]] Olesen B W, Michel E, Bonnefoi F, et al.. Heat exchange coefficient between floor surface and space by floor cooling - theory or a question of definition. ASHRAE Winter Meeting, 2000 Dallas ASHRAE [C]

[[52]] ISO 11855-1:2012. Building environment design—Design, dimensioning, installation and control of embedded radiant heating and cooling systems. Part 1: Definition, symbols, and comfort criterial [S].