The application of air source heat pump assisting solar low-temperature floor heating system in the construction of new countryside

2011 ◽  
Author(s):  
Cao Hui ◽  
Liao Qiuyang
Keyword(s):  
Low Temperature ◽  
Heat Pump ◽  
Heating System ◽  
Air Source Heat Pump ◽  
New Countryside ◽  
Floor Heating

scholarly journals ENERGY PERFORMANCE IN A FLOOR HEATING SYSTEM OF THERMAL ENERGY STORAGE, USING SOLAR DIRECT GAIN AND AIR SOURCE HEAT PUMP

2011 ◽  
Vol 76 (660) ◽  
pp. 169-176 ◽  
Author(s):  
Sookyung KIM ◽  
Ryohei KONO ◽  
Makoto SATOH ◽  
Sayaka KINDAICHI ◽  
Yosihiko AKAMINE ◽  
...  
Keyword(s):  
Energy Storage ◽  
Heat Pump ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Heating System ◽  
Energy Performance ◽  
Air Source Heat Pump ◽  
Floor Heating

scholarly journals Defrosting Performance Improvement of Air-Source Heat Pump Combined Refrigerant Direct-Condensation Radiant Floor Heating System with Phase Change Material

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4594 ◽  
Author(s):  
Chenxiao Zheng ◽  
Shijun You ◽  
Huan Zhang ◽  
Zeqin Liu ◽  
Wandong Zheng ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Heat Pump ◽  
Heating System ◽  
Air Source Heat Pump ◽  
Composite Phase Change Material ◽  
Radiant Floor Heating System ◽  
Radiant Floor Heating ◽  
Change Material ◽  
Floor Heating

Traditional defrosting methods applied to solve frosting problems of air-source heat pumps operating in cold periods may reduce heat capacity of the system and decrease indoor thermal comfort. In order to improve the performance of air-source heat pump (ASHP) and maintain indoor temperature in defrosting conditions, an air-source heat pump combined with a refrigerant direct-condensation radiant floor heating system with phase change material is proposed and evaluated in this study. Two radiant floor heating terminals with and without composite phase change material modules were compared through experiments. A composite phase change material based on dodecanoic acid-tetradecanol-hexadecanol mixture and expanded graphite was investigated for this application. Experimental results indicate that both heat fluxes of two comparing terminals are higher than 70 W/m2 in heating condition. At the same time, the floor surface temperature, indoor air temperature, and heating capacity of the terminal with composite phase change material modules are higher than those without composite phase change material modules in defrosting condition. This suggests that the proposed system with composite phase change material modules can improve indoor thermal comfort in defrosting condition as well as satisfy the heating requirement in heating condition.

Experimental Study on the Multiple Energy Assisted Heat Pump

2012 ◽  
Vol 608-609 ◽  
pp. 969-973
Author(s):  
Dong Zhang ◽  
Xiao Dong Zhou ◽  
Lin Jun Wang ◽  
Qin Tong Zhao ◽  
Tao Min Wei
Keyword(s):  
Heat Pump ◽  
Heating System ◽  
Coefficient Of Performance ◽  
Pump Mode ◽  
Water Heater ◽  
Lanzhou City ◽  
Air Source Heat Pump ◽  
Mode 3 ◽  
Radiant Floor Heating ◽  
Floor Heating

A multiple energy assisted heat pump (MEAHP) system for radiant floor heating was proposed, which integrated a domestic air-assisted heat pump with a solar water heater. The system mainly employed a vacuum tube solar collector with a surface area of 7.44 m2, an electrical rotary-type hermetic compressor, two capillary tubes and three heat exchangers. All operation modes have functioned successfully in Lanzhou city, China. The experimental data of air-source heat pump (Mode 2) and double-source heat pump (Mode 3) have been discussed. The results show that the coefficient of performance (COP) of the MEAHP system and the COP of the space heating system (COPs) are around 2.2 and 1.9 with the room air at 19 °C, respectively, and the temperature difference of the inlet and outlet of the radiant floor heating pipes is 2.8 °C. Some methods to improve the system performance are put forward.

scholarly journals Application and analysis of low temperature air source heat pump heating system in Cold Area

2021 ◽  
Vol 766 (1) ◽  
pp. 012086
Author(s):  
Qiang Wang ◽  
Xiaosheng Zhu ◽  
Fengzhen Liu ◽  
Wenke Zhang ◽  
Hongyang Jiang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Heat Pump ◽  
Heating System ◽  
Air Source Heat Pump ◽  
Cold Area

The Study on the Energy Saving of Wall Mounted Solar Capillary Low-Temperature Hot Water Radiant Heating System

2014 ◽  
Vol 1008-1009 ◽  
pp. 54-57
Author(s):  
Xue Jun Li ◽  
Xiao Yan Luo ◽  
Chuan Qi Xu ◽  
Jin Shun Wu ◽  
Song Pan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Heat Pump ◽  
Heating System ◽  
Hot Water ◽  
Radiant Heating ◽  
Capillary System ◽  
Air Source Heat Pump ◽  
Heat Collector ◽  
Collector Temperature ◽  
Collecting Efficiency

Through the comparative study of solar capillary low-temperature hot water radiant heating system with air source heat pump system has found that solar energy heat collecting efficiency has a great relationship with the collector temperature for the given system. To reduce the temperature of solar heat collector circulating water can greatly improve the heat collecting efficiency of the heat collector .With the increase of temperature of the water in the heat collector, heat collecting efficiency decrease rate changes linearly. Increasing water storage can improve the heat collecting efficiency, for this heat collecting system, the optimum collector temperature is 32 °C. In this study, COP reached 5 when the low temperature solar hot water capillary system mode is being used, and this result is nearly 5 times higher than that of the air source heat pump mode . Using the low temperature solar water heating capillary system, 27.35 kwh / (m2 ·heating season) of electricity can be saved compared with the amount of electricity consumed by air source heat pump. According to the price of current Beijing city , the estimated period of investment payback is 4.8 years .

scholarly journals Energy Saving Potential of Radiant Floor Heating Assisted by an Air Source Heat Pump in Residential Buildings

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1321
Author(s):  
Yu-Jin Hwang ◽  
Jae-Weon Jeong
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Residential Buildings ◽  
Heating Systems ◽  
Air Source Heat Pump ◽  
Heating Capacity ◽  
Heating Loads ◽  
Radiant Floor Heating ◽  
Floor Heating ◽  
Floor Temperature

The objective of this research is to establish an appropriate operating strategy for a radiant floor heating system that additionally has an air source heat pump for providing convective air heating separately, leading to heating energy saving and thermal comfort in residential buildings. To determine the appropriate optimal operating ratio of each system taking charge of combined heating systems, the energy consumption of the entire system was drawn, and the adaptive floor surface temperature was reviewed based on international standards and literature on thermal comfort. For processing heating loads with radiant floor heating and air source heating systems, the heating capacity of radiant floor heating by 1 °C variation in floor temperature was calculated, and the remaining heating load was handled by the heating capacity of the convective air heating heat pump. Consequently, when the floor temperature was 25 °C, all heating loads were removed by radiant floor heating only. When handling all heating loads with the heat pump, 59.2% less energy was used compared with radiant floor heating only. Considering the local discomfort of the soles of the feet, the floor temperature is expected to be suitable at 22–23 °C, and 31.5–37.6% energy saving compared with those of radiant floor heating alone were confirmed.

Heat storage-type floor heating system with heat pump driven by nighttime electric power

1997 ◽  
Vol 26 (2) ◽  
pp. 122-130 ◽  
Author(s):  
Munehiro Yamaguchi ◽  
Sogo Sayama ◽  
Hirokazu Yoneda ◽  
Kin-ya Iwamoto ◽  
Mitsuhiro Harada ◽  
...  
Keyword(s):  
Electric Power ◽  
Heat Pump ◽  
Heat Storage ◽  
Heating System ◽  
Floor Heating ◽  
Storage Type
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