Contractors for the provision of hydrogen end user skills and standards for heat supporting research and evidence

Description: Lot 1 will address two focus areas. i) purging of systems which aims to identify where additional data is required to permit the development of safe purging procedures for both domestic and non-domestic environments. ii) gas tightness and material compatibility of existing pipework and fittings downstream of the emergency control valve (ECV) for hydrogen gas and natural gas as a baseline. Additional information: Suppliers may apply for any or all lots. A separate bid must be submitted for each lot applied for.

The aim lot 2 is to determine materials which are suitable for use with hydrogen. The work will initially consist of a literature search followed by experimental testing (where the literature search concludes additional evidence is required) to quantify the relative risk of using these materials for components downstream of the emergency control valve (ECV) for hydrogen gas relative to natural gas. Additional information: Bidders my apply for any or all lots. A separate bid must be submitted for each lot applied for.

: Lot 3 will undertake a set of scenario specific ventilation and flueing projects to address specific gaps in the evidence base. The work is not seeking to examine whole property ventilation. It is intended to provide evidence to understand the requirements of specific sub-categories of installation work such as ventilation of inter floor piping/voids and flueing requirements of specific appliances such as hydrogen gas fires. The work splits into two workstreams: i) Ventilation associated with pipework located within voids, shafts and ducts, ii) Ventilation and flueing requirements of open flued and flueless appliances such as hydrogen gas fires, water heaters, hobs and cookers. Additional information: Bidders may apply for any or all lots. A separate bid must be submitted for each lot applied for.

The aim of lot 4 is to confirm an appropriate and standardised methodology to be applied to installation pipework sizing (i.e. downstream of the ECV and meter). This will ensure that such pipework has adequate capacity to deliver the flow of hydrogen (per mass or per volume) required to deliver the same flow of energy required to hydrogen burning appliances. Sizing methodology output will take the form of ready reckoner tables in terms of power requirement. Additional information: Bidders may apply for any or all lots. A separate bid must be submitted for each lot applied for.

: Lot 5 will address two focus areas. i) a meter ventilation study to consider representative, internal and external, meter housing, design considerations including necessary clearances, ventilation requirements for gas and the potential for humidity/water build up. ii) an excess flow valve (EFV) study to consider items such as the installation and calibration of EFVs to cover domestic and non-domestic supply. This will include what methodology and basis will be used to set the shutoff point for the valves during operation and purging and understand how to check and test them. Additional information: Suppliers may apply for any or all lots. A separate bid must be submitted for each lot applied for.