The building level substation (BLS) is suggested here as
an innovation to the District Heating (DH) sector
development in China. Introduction of the BLS would
provide obvious benefits in improved energy efficiency
and living comfort, but it also faces institutional
barriers to overcome. CHP concept will be described, and
the economic, institutional and technical issues
associated to BLS will be addressed.
The BLS units are prefabricated compact products that are
designed, manufactured and tested at the factory ready
for transportation to the construction site, where the
complete BLS unit will be mounted to the floor, connected
to the existing indoor piping of heating and water, the
remote communication facilities as well as to power
supplies of the building.
The BLS as an integrated plate heat exchange unit shall
be prefabricated and assembled and successfully tested
both hydraulically and electrically in the factory
already to meet the high functional and low noise
requirements, and if he so wishes, at the presence of the
Borrower's representative. Its base and brazed structures
should have sufficient intensity and stability.
Domestic hot water (DHW) can also be integrated to DH.
BLS makes it possible to complement the DH with DHW
afterwards at low incremental costs: a small heat
exchanger and a small circulation pump as well as
connection to the existing DHW and city water piping are
needed. BLS can be also equipped with an automatic remote
red meter (ARM) to follow energy consumption.
This BLS manual is updated from the 1st version done in
Oct. 2015 (VTT Technology 231, available at:
www.vtt.fi/inf/pdf/technology/2015/T231.pdf). Chapter 2
and 3 are added into the 2nd version. Also some parts of
the text are reorganized in new order and some text is
added and some taken off. The text called "Global trends"
is added in Annex 2.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||63|
|Publication status||Published - 2016|
|MoE publication type||Not Eligible|