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ENERGY & ENVIRONMENT SERVICES

COMBINED HEAT AND POWER

Combined Heat and Power Systems, (CHP), are an efficient way to generate electricity and heat simultaneously. CHP reduces energy costs through maximising the use of primary energy sources. When fuels such as gas, coal, oil, biomass etc are burnt to release energy, the by-product heat is often wasted. CHP Systems harness this heat and uses it to serve another purpose.

"PROjEN's energy experts can perform feasibility studies, advise on available options inline with your businesses size and needs..."

Traditional methods (e.g. electricity from the grid and burning gas/oil separately to produce heat or steam) although convenient, are inefficient and actually waste up to two–thirds of the energy in the original fuel conversion. This low level of efficiency is often compounded by a further 5-10% loss in transmission of the electricity from the source of generation to the user. An on site CHP system can actually generate savings of up to 65% for total energy expenditure.

A CHP system normally consists of a prime mover (e.g. engine) turning an alternator producing electricity and a waste heat recovery system to capture heat from the exhaust and cooling water jacket. Nearly 90% of the energy in the original fuel is put to productive use.

BENEFITS OF CHP SCHEMES

Energy Savings
High reliability
Cleaner air
Easy installation and expansion
“Good Quality" CHP is energy tax exempt.

In the past, due to economies of scale, CHP systems were only viable for large scale operations, today however, advances in technology (Gas Engines, Diesel Engines, Gas turbines, microturbines, heat exchangers etc) make CHP practical and economical from 30kW to 30MW

PROjEN’s energy experts can perform feasibility studies, advise on available options inline with your businesses size and needs. PROjEN can also design, procure and project manage the installation and smooth transition over to a CHP System.

(BI-GENERATION & TRI-GENERATION)

Bigeneration is simply the generation of electricity and heat from the same fuel source. In many instances there is a requirement for cooling water on a site that would normally be provided by mechanical chiller plant operating from the electricity supply, in this case tri-generation can be considered.

Trigeneration includes the ability of generating cooling capacity through the use of absorption or adsorption coolers running on the waste heat produced by a CHP plant. The coefficient of performance (COP) (i.e. overall efficiency of an absorption chiller) may only be 70%, i.e. 70kW of cooling capacity from 100kW heat input, but this is often more beneficial that losing this unwanted heat to the atmosphere, and can often improve the viability of a project.