Benefits and Applications of Small-scale and Micro-CHP Systems
DOI:
https://doi.org/10.13052/dgaej2156-3306.2321Abstract
Why pay for the inef ficiencies of the utility companies? Combined
heat and power (CHP) is a proven technology that provides clean, reli-
able, and affordable energy to a variety of institutions. CHP systems
allow a facility to produce on-site electrical power and obtain overall
efficiencies of over 85%. Standard power production provided by the
utility companies is generally only 40% ef ficient. This is possible because
CHP systems are designed to recover thermal energy from the prime
mover (electrical generating equipment). In the past, many CHP systems
have only been considered for large industrial and large commercial
institutions because of the high capital costs and the increased need to
reduce energy costs. These institutions primarily use large reciprocating
engines, combustion turbines, and steam turbines to produce electricity,
as well as steam or pressurized hot water.
With advancements in manufacturing and design, many CHP
technologies have become more affordable for smaller institutions to
yield both economic and other advantages. These technologies include
microturbines, small reciprocating engines and fuel cells that will pro-
duce electricity in addition to low pressure steam or low temperature hot
water. The lower grade of heat recovery available from these small-scale
and micro-CHP technologies is ideal for smaller institutions.
This article details the bene fits and applications of small-scale and
micro-CHP systems. It also discusses proven examples of how these
CHP systems are being utilized in a variety of institutions. Many of these
small scale and micro-CHP technologies have been on the market for
years; however, with the rising cost of energy, the savings using these
technologies are now justified for smaller systems. Some of the examples
will include new techniques for application, emerging technologies and
renewable energy sources.
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