Reduction of Energy and Water Consumption at EL-TO Power Plant
(Room G104, Auditorium Centre, First Floor)
10 Jun 15
11:00 AM
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12:30 PM
Tracks:
Theme: Operational Excellence & Flexibility
EL-TO Zagreb cogeneration power plant exists on its location since 1907. Presently it has 2 gas turbines, 2 steam turbines, 3 high pressure steam boilers, 1 low pressure steam boiler, 2 HRSGs, 2 hot water boilers, built in different time periods. Its combined power is 330 MW of heat, 160 t/h industrial steam and 90 MW of electricity.
Additionally to those basic units, EL-TO has tens of kilometers of pipelines, many heat exchangers, valves, water treatment plant and other equipment.
At the moment, an ongoing effort is being undertaken to lower all operating costs. High fuel price and high water costs are the main driving force behind it.
When looking at the location as a “black box” different losses can be identified. Water lost to sewage system (carrying away expensive energy with it), heat losses through insulation, exhaust gasses heat, etc… With a concentrated effort many of those losses can be identified, estimated and minimized.
This work concentrates on minimization of water losses on the location and heat losses through insulation.
Water losses are first identified at all positions where they occur. Organizational measures, installation of new measurements and equipment, changes of original concepts were necessary to achieve considerable savings. An accurate flow measurement and a temperature measurement of waste water ware installed on the location border and connected to a power plant control system for permanent monitoring.
A method for thermal insulation inspection and future maintenance is developed as well. The method first identifies all relevant power plant equipment, putting it into a database. Each equipment part is examined by a thermographic camera and heat losses are calculated. Optimal thickness of insulation is determined and economic parameters, like simple payback period for possible new insulation is calculated. Calculations are made according to the norm VDI 2055.