Jun Han

Heriot-Watt University · School of the Built Environment

Semi-Transparent Photovoltaic (STPV) windows have the potential of active energy-saving and have attracted more attention in recent years. Due to the selective absorption effect of solar cells on solar radiation, the indoor thermal environment and human thermal comfort of buildings integrated with STPV windows are considerably different from that w...

The use of double-skin semitransparent photovoltaic (DS-STPV) windows is well recognized as an efficient and effective approach for enhancing the building energy performance. However, despite many studies in relation to the technology have been reported so far, there are few investigations focusing on its use in cold regions. In this study, experim...

For the first time, the impact of indoor air distributions on the thermal and power performances of single layer semi-transparent photovoltaic (SL-STPV) facades was investigated in this study. A novel two-dimensional steady-state heat transfer model for SL-STPV facades was developed and experimentally validated, which is capable to simulate the ope...

Thermal regulation of photovoltaic façade through passive air channel provides a cost effective measure for improving solar to electrical energy conversion efficiency. This study presents a 2D numerical investigation of the fluid flow and heat transfer characteristics of natural convection driven by buoyancy force inside the passive cooling air cha...

This paper studied the annual thermal performance of a photovoltaic wall (PV wall) mounted on a multi-layer façade. Based on some developed unsteady-state heat transfer models for a PV wall and a normal wall, the annual thermal performance of two types of walls was simulated. Compared with a normal wall, the south-facing PV wall could reduce heat g...

It is generally accepted that building external wall design affects its ability to protect occupants from weather extremes, such as heatwaves. However, there is no established methodology to assess this ability in assisting building designers to identify the most resilient design. This study aims at developing an analytical tool to examine wall hea...

The outdoor performance of a naturally ventilated double-sided PV facade was evaluated through field monitoring from a small scale test rig. The comparison of its thermal performance with that of a conventional clear glass façade with shield was made through the field measurement. The measured data show that the maximum indoor air temperature for c...

Steady natural convective airflow in a novel type glazing system with integrated semi-transparent photovoltaic (PV) cells has been analyzed numerically using a stream function vorticity formulation. Based on the resulting numerical predictions, the effects of Rayleigh numbers on airflow patterns and local heat transfer coefficients on vertical glaz...

The lightweight aluminum standing seam roofing system (LASRS) has been widely used as a building element in the construction of either commercial or governmental buildings, and has been proven to be an economic roofing system. However, little research has been conducted into its thermal performance and the effect of the absorptivity (colour) of its...

The hybrid photovoltaic/thermal (PV/T) collector technology is a new trend in solar energy application. For the thermal absorber, a box-frame water-channel design is able to enhance better heat transfer between the solar cells and the liquid coolant, thereby improving the combined electrical and thermal performance of the collector. This article re...

A numerical simulation method has been used to analyze the electric and thermal performance of hybrid photovoltaic and thermal collector wall. The effects of the packing factor, working fluid mass flow rate on the thermal efficiency and electric gain were investigated, and the optimization of design parameters have been found in this paper.

xxii, 138 leaves : ill. ; 31 cm. PolyU Library Call No.: [THS] LG51 .H577P BSE 2010 Han A double skin facade (DSF) is a strategy utilized for improving building performance through using an inner and outer wall on a building with a cavity created between two walls. There is an increasing growing tendency for architects and engineers to use double s...