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14 terms explained</span></h1><p class="lead">Technical terms surrounding "Cogeneration (CHP)", explained and filterable.</p><div class="cta-row"><a class="pill" href="/glaesern/cogeneration/">← Cogeneration (CHP)</a></div></div></section><section class="section reveal"><div class="s-inner"><div class="s-eyebrow">Lexique</div><input id="q" placeholder="Rechercher un terme…" oninput="flt()" style="width:100%;padding:.8rem 1rem;border:1px solid #ddd;border-radius:14px;font-size:1rem;margin-bottom:1rem"><div class="cnt" style="color:#888;font-size:.85rem;margin-bottom:.8rem"><b id="n">14</b> termes</div><div id="g" style="display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px"><div class="lx" data-t="autoconsommation" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Autoconsommation</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">On-site consumption of electricity produced by a cogeneration plant. It helps avoid purchase costs and taxes related to injection into the public grid.</p></div><div class="lx" data-t="chaleur fatale" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Waste heat</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Thermal energy produced during an industrial process or electricity production that is not initially utilized. Its recovery is a major lever for energy efficiency.</p></div><div class="lx" data-t="cogénération (chp)" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Cogeneration (CHP)</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Simultaneous production of heat and electricity from the same primary energy source. In France, it allows optimizing the overall energy efficiency of an industrial or tertiary site.</p></div><div class="lx" data-t="effacement" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Effacement</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Voluntary or forced reduction of electricity consumption or production on the grid at specific times. Operators can be paid to participate in curtailment programs.</p></div><div class="lx" data-t="icpe 2910" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">environmental impact study (EIA) 2910</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Heading of the nomenclature for Installations Classified for Environmental Protection concerning energy production installations. It defines the regulatory framework and safety requirements for cogeneration sites.</p></div><div class="lx" data-t="moteur à gaz" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Gas engine</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Thermal machine converting the chemical energy of a gaseous fuel into mechanical then electrical energy. It is a standard technology for high-efficiency cogeneration.</p></div><div class="lx" data-t="obligation d'achat" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Purchase obligation</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Regulatory mechanism requiring electricity suppliers to purchase electricity produced by certain installations. It guarantees a fixed selling price for producers.</p></div><div class="lx" data-t="pci" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">PCI</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Lower Heating Value of the energy source used (e.g., natural gas). It represents the energy released by combustion minus the energy required to evaporate water.</p></div><div class="lx" data-t="rendement global" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Overall efficiency</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Ratio between total energy produced (electrical + thermal) and primary energy consumed. It is significantly higher than electrical efficiency alone thanks to heat recovery.</p></div><div class="lx" data-t="rendement thermique" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Thermal efficiency</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Ratio between the recovered and useful heat and the energy contained in the fuel. It is significantly higher than electrical efficiency alone.</p></div><div class="lx" data-t="rendement électrique" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Electrical efficiency</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Ratio between the produced electrical power and the thermal power of the consumed fuel. It is generally lower than 40% for internal combustion engines.</p></div><div class="lx" data-t="récupération de chaleur" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Heat recovery</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Technical process consisting of capturing heat produced by exhaust gases or the cooling circuit. This heat is then used for industrial processes or heating.</p></div><div class="lx" data-t="tarif d'achat cogénération" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">Cogeneration purchase tariff</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Price set by regulators for injecting electricity produced by a cogeneration plant into the grid. It is often differentiated according to the energy source and installed capacity.</p></div><div class="lx" data-t="turpe" style="background:#fff;border:1px solid #eee;border-radius:14px;padding:14px 16px"><h3 style="margin:0 0 .3rem;font-size:1rem;color:#ea580c">CEB power fee</h3><p style="margin:0;font-size:.9rem;color:#555;line-height:1.5">Public Electricity Network Usage Tariff. 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