Analysis of Solar Chimney Application for Building Heating and Cooling in Different Climates in China

Zhang, Lili; Dong, Zhuojun; Liu, Fei; Hou, Yuyao; Cheng, Jingyue; Du, Junfei; Qiu, Jingwen; Li, Yanru

doi:10.1061/jleed9.eyeng-4612

Cited by 8 publications

(2 citation statements)

References 55 publications

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“…Before designing the improved system, according to data provided project party, the heat load of the hospital was calculated to be 152kw. After consulting the relevant data [9][10][11][12], the calculation of table 2 main equipment parameters.…”

Section: Selection Of Main Equipmentmentioning

confidence: 99%

Simulation and Majorization of Multi-source Relatively Complemented Heating System Based on TRNSYS

Liu²,

Yang³

et al. 2023

J. Phys.: Conf. Ser.

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In order to make up for the shortcomings of solar energy, ground source heat pump as well as air source heat pump during heating, a new multi-complementary heating system with three heat sources is proposed. Take the Tumeteyouqi item as the object of study for program devise and load simulation on the basis of the set scheme, and TRNSYS hybrid heating system is established. The main parameters of the air source heat pump and the solar collector are optimized, and the hooke-Jeewes and Coordinate descent optimization algorithms are used to optimize the annual value of system costs, and the two algorithms are compared. Results are included the Collector area of 80m2, the Collector of 42.1875 ° inclination, Azimuth Angle of 10°. The unit area is homologous and the volume of the water box is 0.10125. The capacity of the water tank is 8.1 m3, and the heat quantity of the air source heat pump is 286200kj/h. The system reaches the optimum, and the annual value of the heating cost is reduced by 3.8%. Then the supply heating cost is reduced by 4.96%. The Hooke-Jeewes algorithm is superior to the Coordinate descent algorithm.

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Section: Selection Of Main Equipmentmentioning

confidence: 99%

Simulation and Majorization of Multi-source Relatively Complemented Heating System Based on TRNSYS

Liu²,

Yang³

et al. 2023

J. Phys.: Conf. Ser.

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show abstract

“…One of the most frequently used sources of renewable energy is solar energy. The study 3 found that buildings using solar chimneys can reduce cooling loads by 30%–100% in summer and heating loads by 46%–56% in winter. Therefore, it is beneficial to use solar chimney enhanced ventilation technology to reduce building energy consumption.…”

Section: Introductionmentioning

confidence: 98%

Theoretical analysis and numerical study of natural convection inside combined solar chimney

Cui,

Han,

Zhang

et al. 2024

Energy Science & Engineering

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Solar chimneys may induce natural ventilation through solar radiation. However, sufficient theoretical studies are needed as a basis to fully exploit passive design in practical green building design. In this work, we investigate the heat transfer properties of turbulent natural convective flows in a combined solar chimney with a thermal flux at the absorption wall by means of theoretical analysis and numerical simulations. Two different flow patterns have been found, one with a clear thermal boundary layer flow pattern and the other without, based on high Rayleigh numbers. For flow development in these two flow regimes, the transient scaling analysis is performed separately and the control mechanism for each phase is presented. Some new scale relationships are established to characterize the ventilation performance of solar chimneys, including thermal boundary layer thickness δT, velocity vT, mass flow m, and so on. For the distinct thermal boundary layers, δT,s ~ HΓ2/5/Bo1/5κ2/5, vT,s ~ Bo2/5κ4/5Γ1/5/H, m ~ ρBo1/5κ2/5Γ3/5. For nonobvious thermal boundary layers, vT,f ~ Bo1/3κ/H2/3W1/3, m ~ ρBo1/3κ/A2/3. The important scale relationships are validated using corresponding numerical simulation data, such as the mass flow rate scale M ~ (Γ/κ)3/5Bo1/5 in the distinct thermal boundary layer flow state, and so on. The air changes per hour and heat exchange efficiencies are calculated for a solar chimney with a fixed height‐to‐width ratio to provide a basis for the design of a solar chimney.

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Research on the new passive optimization strategies for improving the performance of combined solar chimney

Han,

Cui,

Han

et al. 2024

Energy and Buildings

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Analysis of Solar Chimney Application for Building Heating and Cooling in Different Climates in China

Cited by 8 publications

References 55 publications

Simulation and Majorization of Multi-source Relatively Complemented Heating System Based on TRNSYS

Simulation and Majorization of Multi-source Relatively Complemented Heating System Based on TRNSYS

Theoretical analysis and numerical study of natural convection inside combined solar chimney

Research on the new passive optimization strategies for improving the performance of combined solar chimney

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