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Minimizing Steam Production at Stand-by

In an ammonia plant, often one or more boilers are kept on standby in case of failure of the operating boiler. By modifying the burner, combustion air supply and boiler feedwater supply, this steam production at standby can be reduced to virtually zero. By installing an automatic control system the boiler can reach full capacity within 12 minutes (Worrell and Galitsky, 2005 p.39).

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Minimizing Steam Production at Stand-byCosts & Benefits

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Energy Savings Potential

Energy savings up to 85% of the standby boiler are achieved by installing the control system and modifying the boiler. Actual figures depend on the use pattern of the boiler (Worrell and Galitsky, 2005 p.39). 

Dutch Flag By applying this system, a plant in Netherlands reduced standby steam consumption from a small 40 t/hr steam boiler from 6 t/hr to 1 t/hr. This resulted in energy savings of 57 PJ/year (CADDET, 1997).

CO2 Emission Reduction Potential

Dutch Flag For the plant in Netherhalds, investments to implement this measure were approximately $ 270,000 (1991 values), resulting in a payback period of 1.5 years (CADDET, 1997). 

Minimizing Steam Production at Stand-by Guidelines

Energy Efficiency Improvement and Cost Saving Opportunities for Petroleum Refineries: An ENERGY STAR Guide for Energy and Plant Managers

This guide, prepared by Worrell, E. and C. Galitsky, provides detailed information on energy efficiency measures applicable to petroleum refineries, along with their energy and cost implications.

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