Simulation Analysis of Heat Transfer on Low Temperature Hot-Water Radiant Floor Heating and Electrical Radiant Floor Heating

2012 ◽  
Vol 204-208 ◽  
pp. 4234-4238
Author(s):  
Han Bing Qi ◽  
Fu Yun He ◽  
Qiu Shi Wang ◽  
Dong Li ◽  
Lin Lin
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Low Temperature ◽  
Heating System ◽  
Heat Transfer Process ◽  
Hot Water ◽  
Radiant Heating ◽  
Radiant Floor Heating ◽  
Heating Mode ◽  
Floor Heating

Radiant floor heating as a new type of energy-saving heating method has more and more used in modern building heating project. According to the different heat source, radiant floor heating is divided into low temperature hot-water floor radiant heating and electrical floor radiant heating. This paper analyzes the heat transfer process of structure layer of the low temperature hot-water and electrical floor radiant heating system, establishes two dimensional steady heat transfer mathematic model, numerical calculation using Fluent software. Respectively simulated when floor materials is different, the heat transfer process of low temperature hot-water floor radiant heating and electrical floor radiant heating system, The analysis results show that: for low temperature hot-water floor radiant heating, when floor material is soft wood, the ground temperature distribution is more uniform; for electrical floor radiant heating, when floor materials is marble, the ground temperature distribution is more uniform; electrical floor radiant heating is more energy saving, and temperature distribution in the ground of floor using the constant heat flux electric heating mode is more uniform than which using the low temperature hot water heating mode.

The Research on the Heat Transfer Process of Low Temperature Hot Water Radiant Heating Phase Change Wallboard

2013 ◽  
Vol 800 ◽  
pp. 18-21
Author(s):  
Quan Ying Yan ◽  
Li Hang Yue ◽  
Ran Huo
Keyword(s):  
Heat Transfer ◽  
Mathematical Model ◽  
Low Temperature ◽  
Phase Change ◽  
Physical Model ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Hot Water ◽  
Radiant Heating ◽  
Heating Phase

In this paper, physical model and mathematical model of the hot water radiant heating phase change wallboard were built. The heat transfer process of wallboard was simulated to analyze different influencing factors and optimize the design of the hot water heating phase change wallboard. The research results can provide reference and basis to the optimization of low temperature hot water radiant heating phase change wallboard.

scholarly journals Research on Control Property of Low-temperature Floor Radiant Heating System

2015 ◽  
Vol 9 (1) ◽  
pp. 311-315 ◽  
Author(s):  
Enfu Yang
Keyword(s):  
Low Temperature ◽  
Air Temperature ◽  
Indoor Air ◽  
Control Strategies ◽  
Heating System ◽  
Radiant Heating ◽  
Wide Range ◽  
New Energy ◽  
Radiant Floor Heating ◽  
Floor Heating

A new energy-efficient and comfortable heating system, low-temperature floor radiant heating system of floor radiation is increasingly applied to a wide range of housing construction. In the paper, establishing the model of radiant floor heating systems, the effect of outdoor temperature, enclosure structures and heating storage characteristics that influence the indoor air temperature and the enclosure temperature, have been analyzed. The fuzzy-PID controller is chosen as the control radiant floor heating system. Several control strategies such as air-based control, slab-based control, and twoparameter control have been compared. Two-parameter control based on the floor surface temperature and the indoor air temperature is very stable, with high initial investment.

Implementation of Solar Thermal Driven Absorption Cooling in the Southeast

2010 ◽  
Author(s):  
Stephen M. Smith
Keyword(s):  
Heating System ◽  
Hot Water ◽  
Solar Thermal ◽  
Absorption Chiller ◽  
Solar Absorption ◽  
Modeling Process ◽  
Annual Behavior ◽  
Cooling Loads ◽  
Radiant Floor Heating ◽  
Floor Heating

A 35,000 ft2 [3,251 m2] Creative Arts instruction building is being constructed on the campus of Haywood Community College in Clyde, NC (∼25 miles [40 km] west of Asheville). The building’s HVAC system consists of a solar absorption chiller, two parallel back-up electric chillers, and radiant floor heating with condensing boiler back-up. Hot water is to be heated by 117 solar thermal panels with thermal energy storage in a 12,000 gallon [45,000 liters] insulated tank and service to both the absorption chiller and the radiant under-floor heating system. Peak cooling loads and unfavorable solar conditions are to be handled by parallel electric chillers, operated in sequence to achieve maximum performance. Emergency radiant under-floor heating hot water back-up is to be handled by gas-fired condensing boilers in the event of unavailable solar heated hot water. This paper will examine the extensive modeling process required of the system as performed in EnergyPlus, how preliminary modeling results influenced the control and design strategy, the annual behavior of the system and the importance of controllability.

A New Heat Transfer Model for Floor Configuration Layer of the Low-Temperature Water Floor Radiant Heating System

2011 ◽  
Vol 71-78 ◽  
pp. 1875-1879 ◽  
Author(s):  
Ying Xu ◽  
Xiao Yan Liu ◽  
Lan Shuang Zhang
Keyword(s):  
Heat Transfer ◽  
Low Temperature ◽  
Heating System ◽  
Radiant Heat ◽  
Transfer Model ◽  
Radiant Heating ◽  
Calculation Methods ◽  
Simulation Results ◽  
And Mathematics ◽  
Temperature Water

The floor configuration layer and the floor radiant heat transferred by heat transferred configuration layer exterior with other walls are taken into account in this paper, then physical and mathematics models are developed. Simulation results as well as testing results are compared and analyzed to prove that the models and the calculation methods are right.

scholarly journals Analysis of Thermal Performance and Energy Saving Potential by PCM Radiant Floor Heating System based on Wet Construction Method and Hot Water

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 828 ◽  
Author(s):  
Sanghoon Baek ◽  
Sangchul Kim
Keyword(s):  
Energy Saving ◽  
Thermal Performance ◽  
Indoor Air ◽  
Heating System ◽  
Hot Water ◽  
Set Point ◽  
Energy Saving Potential ◽  
Radiant Floor Heating System ◽  
Radiant Floor Heating ◽  
Floor Heating

A phase change material (PCM) is an energy storage mass with high heat storage performance. In buildings, PCMs can be utilized to save energy in radiant floor heating systems. This study aims to analyze the thermal performance and energy saving potential by the PCM radiant floor heating system based on wet construction method and hot water. For such analysis, EnergyPlus program was used. As for the results, it was found that the proposed system almost maintained the set point of indoor air and a floor surface. Moreover, when a 10 mm PCM was applied, it was possible to save 2.4% of heating energy annually compared to existing buildings. In particular, when a 20–50 mm PCM was applied, it was found that 7.3–15.3% of heating energy was reduced annually. If indoor air temperature exceeds the comfort range of the proposed system, this problem can be solved by adjusting the set point of the floor surface or by increasing the temperature of hot water.

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