On Capex Forecasting of District Heating Networks in Existing Neighbourhoods

The energy required for space heating amounts to approximately 70% of the total energy demand of existing buildings in Europe. Decarbonization of the heat demand of existing buildings is one of the grand challenges in the energy transition and sustainable district heating is a promising solution in many neighborhoods. The construction cost of...

Low temperature district heating based on low temperature geothermal heat (30 oC)

A comparative study for a representative case district in the Netherlands with around 2500 dwellings has been executed with the purpose of identifying the best solution for a Low Temperature District Heating (LTDH) with Low Temperature Geothermal Heat (LTGH) as the main heat source. The district is presently connected to the Dutch gas network....

The impact of lateral house connections on the serviceability of sewer systems

It remains unknown how lateral house connections affect the performance of the sewer system, since the assessment of serviceability is mainly based on the state of the main sewer system. Further insight into the contribution of lateral house connections to the overall level of service provided can aid to target investments to parts of the system...

Air pocket removal from downward sloping pipes

Air-water flow is an undesired condition in water pipelines and hydropower tunnels. Water pipelines and wastewater pressure mains in particular are subject to air pocket accumulation in downward sloping reaches, such as inverted siphons or terrain slopes. Air pockets cause energy losses and an associated capacity reduction. Despite its practical...

Validation of the surge model and lessons learnt from commissioning of the Shuweihat water transmission scheme, UAE

This paper presents a validation of the surge modeling results as well as lessons learnt from the commissioning test of the Shuweihat Water Transmission Scheme in the UAE. The Scheme is divided in two systems, The first system (Lot A) transmits water from Shuweihat to Mirfa (100 km). The second (Lot C) is from Mirfa to Mussafah (150 km). The...

Innovative air vessel design for long distance transmission pipelines

The Shuweihat Water Transmission Scheme (SWTS, UAE) consists of a twin DN1600 DI PN25 pipeline transmitting 150 MIGD over 250 km from Shuweihat Desalination plant to Mussafah (Abu Dhabi city). The Scheme is divided in two subsequent systems, each with a tank farm and a pump station delivering water to downstream terminal reservoirs and direct...

Guidelines for transient analysis in water transmission and distribution systems

All water systems leak, and many supply systems do so considerably, with water losses typically of approximately 20% of the water production. The IWA Water Loss Task Force aims for a significant reduction of annual water losses by drafting documents to assist practitioners and others to prevent, monitor and mitigate water losses in water...

Guidelines on capacity reducing gas pockets in wastewater mains

Technical feasibility of energy conversion from salinity gradients along the Ducth coast: A case study at IJmuiden

In the mixing process of water with different salinities a large amount of energy is released, which is normally converted into heat if fresh water rivers enter estuaries and seas. This energy, often referred to as Blue Energy, may be extracted by two different processes: Reversed Electrodialysis (RED) or Pressure Retarded Osmosis (PRO). The...