Abstract

This research is a case study, and was focused on the District Heating (DH) System in Pascani town, powered with cogeneration engine. The main problem started because of the overload regime in domestic hot water (DHW) supply. In the case analysed, the level of the flow-metering in the interior installations is very low (about 10 to 15%). As a result, the level of consumption depends on the time period when DHW is available. In order to decrease the cost to the District Heating Company (DHC), the duration of DHW delivery is restricted. A direct solution to this problem is the sub-metering for DHW. Some questions remain. The issue was the differences registered between the general flow meter and the sum registered by the sub metering system.

The whole installation must be optimised, starting with heat exchanger, booster pumps, valves, actuators, and continuing with water accumulators. The aim is the client satisfaction, and the automatic control system must cover all the restricted situations. For simulating in MATLAB (high performance numeric computation and Vizualization Software) the thermal and hydraulically systems with pumps, we use the diagram of fluid circuit on which control valve and pumps are mounted.

Paper

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Panels of

Panel 1. Energy efficiency – a strategic choice for Europe

Panel 2. Comfort and energy use in buildings

Panel 4. Building the bridge from lab to customer

Panel 3. Land use, transportation and mobility

Panel 6. Dynamics of consumption

Panel 5. Market-based instruments