0196-8904/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.enconman.2011.11.011 ⇑ Corresponding authors. Tel./fax: +86 551 3607367 E-mail addresses: [email protected] (P. Gang), j Heat-pipe photovoltaic/thermal (HP-PV/T) systems can simultaneously provide electrical and thermal energy. Compared with traditional water-type photovoltaic/thermal systems, HP-PV/T systems can be used in cold ...