A critical review of the research about radiant cooling systems in China

Zhang, Fan; Guo, Heinz-Axel; Liu, Zhengxuan; Zhang, Guoqiang

doi:10.1016/j.enbuild.2021.110756

Cited by 55 publications

(17 citation statements)

References 80 publications

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“…The application of RRCC heat pump require to set up connection between the heat pump and envelop, there are many practice for the so called connections, the pipe-embedded wall is already used for cooling and heating (6, 7), and capillary tube mat emerged in 1981( 8) is another way with extensive application (9,10,11), even for window, water flow window (12,13) has been explored. Based on this, there is no real obstacle for application of the RRCC heat pumps.…”

Section: Applicationmentioning

confidence: 99%

A Revised Reversed Carnot Cycle Heat Pump with Close Energy Flow Cycle & without Temperature Gap: Do We Really Need to Extract Heat from Ambient for Heating

Yuan¹

2022

Preprint

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A revised reversed Carnot cycle without external heat source and temperature gap is proposed to challenge the classic reversed Carnot cycle, heat pumps based on the proposed cycle with super energy efficiency works just like electric heater fitted for any climate including extreme cold weather, the application of these new heat pumps is discussed with conclusion that little real obstacles exist for scale application to address the heating related climate change, also a demonstration case shows a remarkable results to encourage the applications of these new heat pumps.

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Section: Applicationmentioning

confidence: 99%

A Revised Reversed Carnot Cycle Heat Pump with Close Energy Flow Cycle & without Temperature Gap: Do We Really Need to Extract Heat from Ambient for Heating

Yuan¹

2022

Preprint

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“…Also, thermal radiation has a role more significant than 40% when the duration of the stay is less than one hour [12]. Specifically, recent studies proved that surface cooling has a high impact on the comfort of open spaces [13]. However, authors like Rocha et al [14] designed a complete example of an intervention in a semi-open space, which showed a possible but complex challenge.…”

Section: Main Considerations Of Thermal Comfort In Open Spacesmentioning

confidence: 99%

“…Equation (12) shows the result for cooling mode and Equation ( 13) for heating mode. h cv1 = e 1.8127 •LMTD cv 0.4596 (12) h cv2 = e 0.83 •LMTD cv 0.2975 (13) The validation of the proposed model in cooling mode is given by executing the model with the input data (air temperature, temperature of surrounding surfaces, water flow, and water inlet temperature). There were two results that needed to be validated: total heat flux and water outlet temperature.…”

Section: Identification Of Parameters and Validationmentioning

confidence: 99%

“…• . (13) The validation of the proposed model in cooling mode is given by executing the model with the input data (air temperature, temperature of surrounding surfaces, water flow, and water inlet temperature). There were two results that needed to be validated: total heat flux and water outlet temperature.…”

Section: Identification Of Parameters and Validationmentioning

confidence: 99%

“…Figure 17 shows the same results for heating mode. In this case, the convective heat transfer coefficient was the h cv2 value from Equation (13).…”

Section: Identification Of Parameters and Validationmentioning

confidence: 99%

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Adaptative Cover to Achieve Thermal Comfort in Open Spaces of Buildings: Experimental Assessment and Modelling

et al. 2021

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The global need for healthy and safe open spaces faces continuous temperature rise due to the heat island phenomenon and climate change. This problem requires new strategies for improving the habitability of open spaces (indoor and outdoor conditions in buildings). These techniques include reducing solar radiation, reducing the temperature of surrounding surfaces, and reducing the air temperature. The radiant solutions are essential for outdoor comfort, both in summer and in winter. They are easy to integrate into open spaces. This study explores a new concept of radiant solutions adapted for outdoor spaces. The solution was evaluated in a test cell to obtain its thermal behaviour in different operation conditions. Solutions were optimised for operating in a cooling regimen since it has been identified that the demands for comfort in open spaces in hot climates during the most severe summer months are more pronounced. Experimental results have allowed getting an inverse model to analyse the thermal behaviour of the solution. The inverse model achieved high precision in its estimations. Also, it facilitated knowing the radiant and convective effects. Only the radiant heat flux is relevant in open spaces with a low level of air confinement. Finally, the discussion describes the application of the proposed model. The model allows the replicability of the solution—creating new designs (integration) or evaluating into different operating conditions of the system. This discussion demonstrates the high level of knowledge acquired in the characterisation of the solution studied.

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A review of radiant heating and cooling systems incorporating phase change materials

Rashid,

Hussein,

Al-Obaidi

et al. 2024

J Therm Anal Calorim

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A critical review of the research about radiant cooling systems in China

Cited by 55 publications

References 80 publications

A Revised Reversed Carnot Cycle Heat Pump with Close Energy Flow Cycle & without Temperature Gap: Do We Really Need to Extract Heat from Ambient for Heating

A Revised Reversed Carnot Cycle Heat Pump with Close Energy Flow Cycle & without Temperature Gap: Do We Really Need to Extract Heat from Ambient for Heating

Adaptative Cover to Achieve Thermal Comfort in Open Spaces of Buildings: Experimental Assessment and Modelling

A review of radiant heating and cooling systems incorporating phase change materials

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