Energy performance of water flow window as solar collector and cooling terminal under adaptive control

Li, Chunying; Lyu, Yuanli; Li, Cuimin; Qiu, Zhongzhu

doi:10.1016/j.scs.2020.102152

Cited by 24 publications

(12 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy from solar radiation ( E ) falling onto a window will be transmitted ( E trans ), absorbed ( E abs ), and reflected ( E ref ). [ 8,14 ] Conservation of the total energy in the solar radiation beam follows Equation ()

\begin{equation} E = {E_{{\rm{trans}}}} + {E_{{\rm{abs}}}} + {E_{{\rm{ref}}}} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

“…The energy from solar radiation (E) falling onto a window will be transmitted (E trans ), absorbed (E abs ), and reflected (E ref ). [8,14] Conservation of the total energy in the solar radiation beam follows Equation ( 1)…”

Section: Resultsmentioning

confidence: 99%

“…However, such windows cannot modulate the light transmittance, also, owing to the high transparency of the window panes, the conversion efficiency of the solar energy is commonly low (between ≈5% and 15%), which prohibits their future applications (Figure 1a). [14,15] Here, we propose a new design to combine the electrochromic dynamic window and the water-flow window, namely an SWH smart window. The metal layers deposited on the conductive substrates work as flat-plate solar collectors, which efficiently convert solar energy into heat, and the water flow systems transport/store the thermal energy for indoor heating (Figure 1b).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Solar Water‐Heating Smart Window by Integration of the Water Flow System and the Electrochromic Window Based on Reversible Metal Electrodeposition

et al. 2021

View full text Add to dashboard Cite

Various smart windows with dynamic modulation of the light transmittance have been developed rapidly in recent years. However, current design of the smart windows can only modulate the indoor solar irradiation instead of effectively utilize them. Here, a solar water‐heating (SWH) smart window is proposed by the integration of the traditional electrochromic window and the water flow system, which can not only provide dynamic daylight modulation but also harvest the solar energy and store them by heating water. In the SWH window, the reversible metal electrodeposition (RME) not only provides daylight modulation but also provides metal layer working as a flat‐plate solar collector for energy harvesting. Compared with traditional electrochromic windows, the SWH window with a water flow system can more effectively modulate the indoor temperature, owing to the significantly enhanced tunability of the thermal irradiation from the window. Compared with water‐flow windows, the RME provide a metallic layer for efficient light harvesting, up to 42% solar energy can be effectively harvested and stored as hot water. Such an SWH smart window is promising to reduce the heating, lighting, and air conditioning energy consumption, which may bring new insights in the design of the next‐generation green buildings.

show abstract

\begin{equation} E = {E_{{\rm{trans}}}} + {E_{{\rm{abs}}}} + {E_{{\rm{ref}}}} \end{equation}

…”

Section: Resultsmentioning

confidence: 99%

“…The energy from solar radiation (E) falling onto a window will be transmitted (E trans ), absorbed (E abs ), and reflected (E ref ). [8,14] Conservation of the total energy in the solar radiation beam follows Equation ( 1)…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Solar Water‐Heating Smart Window by Integration of the Water Flow System and the Electrochromic Window Based on Reversible Metal Electrodeposition

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, engineering errors are not considered, including the slope, specular, and contour errors of a linear Fresnel lens, the installation error of the linear cavity receiver, the system's tracking error, etc. [26,27]. The half angular width of the sun is set to 0.27 • during simulation to close to reality [28,29].…”

Section: Optical Work Validationmentioning

confidence: 99%

Optical Performance Comparison of Different Shapes of Cavity Receiver in the Fixed Line-Focus Solar Concentrating System

Hai

Song

2022

Sustainability

View full text Add to dashboard Cite

To optimize the fixed-focus solar concentrating system (FLSCS) and linear cavity receiver of better optical performance, the effects of receiver parameters (geometric shape, receiver position f, receiver internal surface absorptivity αab, and end reflection plane reflectivity ρr) on the relative optical efficiency loss ηre-opt,loss, the maximum value of the local concentration ratio Xmax, and the non-uniformity factor σnon were studied in the present study. The results showed that the increases of sun declination angle δ in the range of 0–8° have a weak effect on the ηre-opt,loss. The ηre-opt,loss are 2.25%, 2.72%, 12.69% and 2.62%, 3.26%, 12.85%, respectively, when the solar hour angle ω is 0°, 30°, 60° as δ = 0° and 8° for linear rectangular cavity receiver. The Xmax mainly depends on the energy flux distribution of first intercepted sunlight on the cavity absorber inner wall. Increasing the distance between the cavity absorber inner wall and the focal line Δf can affect the Xmax. The smaller the Δf, the greater the Xmax, and vice versa. The changing trend of σnon is basically consistent with that of the Xmax. When the f is 600, 625, 650, 675, 700 mm and the ω = 0°, the σnon are 0.832, 0.828, 0.801, 0.747, and 0.671, respectively, for linear rectangular cavity receiver. This work could establish the foundation for further research on the optical to thermal energy conversion in the FLSCS.

show abstract

“…Especially for locations with a warm climate, transparent partitions are components of external walls that can overheat the interior of the building. Paper [ 32 ] presents a computational procedure for the functioning of a liquid flow system within the inter-pane space of a 9 m 2 window unit. The heat obtained and cold from a low-temperature source and an active solar energy system allowed the window temperature to stabilise on a daily basis.…”

Section: Introductionmentioning

confidence: 99%

The Impact of a Mobile Shading System and a Phase-Change Heat Store on the Thermal Functioning of a Transparent Building Partition

Musiał

Lichołai

2021

Materials

View full text Add to dashboard Cite

The article presents the results of multi-month field tests and numerical analyses describing the thermal functioning of mobile shading systems for building windows containing a phase-change heat accumulator. The experiments were conducted in the summer period with temperate climate conditions in Rzeszów (Poland). The tested shading system was dedicated to the daily life cycle of residents, taking into account both the need to illuminate the rooms with natural light and reducing the undesirable overheating of the rooms in the summer. The obtained empirical results showed a reduction in room overheating in the summer period by 29.4% from composite windows with a phase-change heat accumulator and a mobile shading system as compared to the reference composite window with an analogous mobile shading system. The database of empirical results allowed for the creation and verification of a numerical model of heat conversion, storage and distribution within the composite window containing phase change material and a mobile shading system. The verified model made it possible to analyse the thermal functioning of the modified transparent partitions in cool temperate, temperate and subtropical climates. The article is a solution to the problem of undesirable overheating of transparent building partitions by efficient storage and distribution of solar radiation energy thanks to the use of a mobile shading system and a phase change material, while presenting a useful tool enabling the prediction of energy gains in different climatic conditions.

show abstract

Energy performance of water flow window as solar collector and cooling terminal under adaptive control

Cited by 24 publications

References 30 publications

A Solar Water‐Heating Smart Window by Integration of the Water Flow System and the Electrochromic Window Based on Reversible Metal Electrodeposition

A Solar Water‐Heating Smart Window by Integration of the Water Flow System and the Electrochromic Window Based on Reversible Metal Electrodeposition

Optical Performance Comparison of Different Shapes of Cavity Receiver in the Fixed Line-Focus Solar Concentrating System

The Impact of a Mobile Shading System and a Phase-Change Heat Store on the Thermal Functioning of a Transparent Building Partition

Contact Info

Product

Resources

About