Scope
L.1325 provides guidelines for improving existing telecom network infrastructure or planning, designing, and constructing new one. Specifically, it emphasises green ICT solutions for telecom network facilities to increase energy efficiency and reduce carbon emissions. It covers different aspects of ICT infrastructure, such as power supply, cooling, and maintenance, and provides best practices and guidelines for applying various green solutions.
Summary
General requirements for green solutions: Any green solution should not compromise the safety and life cycle of the telecommunication equipment and its environment and should be selected according to local situations. It lists ITU-T recommendations for optical fibre cables, infrastructures, maintenance and operation, passive optical devices, and marinised terrestrial cables.
High efficiency power-feeding solutions: Describes several power-feeding solutions that can improve the energy efficiency of telecom network facilities, such as high-frequency switching rectifier sleeping mode, HVDC power feeding, parallel active power filter, and high temperature lead acid battery for reducing the power loss, harmonic distortion, and heat generation of the power supply system, and extend the battery life.
Renewable energy power supply solutions: The recommendation details some renewable energy solutions that can reduce carbon emissions of telecom network facilities, such as solar power, wind power, and hydrogen fuel cell. The use of natural resources to generate electricity and provide backup power for the ICT equipment is also recommended.
Air conditioning power-saving solutions: For the air conditioning solutions that can save energy for telecom network facilities, such as refrigerant pumping, adaptive control, central air conditioning inverter, and wet film are elaborated. With these solutions, the aim is to adjust the cooling capacity, air flow, and temperature of the air conditioner according to the load demand, environmental conditions, and humidity level.
Use of free and economical cooling solutions: The recommendation also discusses some cooling solutions that can use natural resources or heat exchange to cool telecom network facilities, such as outdoor fresh air cooling, heat exchange cooling, heat pipe, and cooling tower free cooling. These solutions can help reduce or replace the use of refrigeration components and lower the power consumption of the cooling system.
Relevance for EXIGENCE
Relevant for requirements and scenarios, resource interconnectivity, orchestration and energy optimisation.
