The Chinese parabolic trough collector manufacturer Inner Mongolia XuChen Energy has successfully operated a huge solar district heating plant since 2016 in a village near Baotou in Inner Mongolia, an autonomous region of China.
The installation in Baotou consists of two fields of parabolic trough collectors, a 22,000 m2 rooftop field on XuChen’s factory hall next to the company’s headquarters and a 71,000 m2 system put up at ground level. The 93,000 m2 (65 MWth) SDH plant is the world’s second-largest after Denmark’s Silkeborg (110 MWth) installation but the biggest using concentrating collectors. It provides 500,000 m2 of residential buildings, buildings in a neighbouring industrial zone and a shopping mall with solar heat.
The 93,000 m2 solar plant is part of the government’s green heat policy to improve air quality in China’s northern provinces and phase out coal boilers. This policy is part of the overall trend to improve social living conditions and provide affordable housing which is summarized under the slogan “livelihood”- a term created by the Chinese government. Wang confirmed that the installation of the solar plant in Baotou is the first livelihood project introducing solar space heating to the region. ‘The government has completely taken over the RMB 0.55 billion in capital costs for the solar field, including the storage tank and the newly built heat network,’ Wang explained in an interview with solarthermalworld.org. This 100 % public subsidy was what prompted XuCheng’s investment in a collector factory in the same city. XuChen, founded in spring 2016, also invested Renminbi (RMB) 1.05 billion, i.e., USD 154.7 million, in putting up headquarters as well as a 50,000 m2 factory for parabolic trough collectors in Baotou’s green industrial park.
Solar heat transported to nearby heat consumers by truck
Wang said that he has observed an increase in solar heat demand from China’s northern provinces. He added that surplus heat generated in summer, when none of the buildings connected to the SDH system require space heating, is transported by truck to nearby consumers, including hotels, swimming pools and spas. As China’s green heat policy requires the phase-out of coal boilers and because heat pumps rack up high electricity bills, purchasing solar heat from Baobou’s SDH plant is an economically viable option for those requiring large amounts of heat all year round.
Another huge solar district heating system is currently being built by XuChen in Han Dan, in the north of China. According to Wang, this plant will provide heat to a new all-weather, four season ecotourism vacation and leisure park. Due to the green heat policy of the government the construction of the leisure park would not have been possible without a source of clean energy for heating, in this case provided by SDH.
Sources and full article: solarthermalworld.org