Energy Efficiency Measures

Energy efficiency measures can reduce port energy consumption through equipment upgrades, infrastructure improvements, and optimized operational practices. This includes, among others, light emitting diode (LED) lighting conversions, smart building controls, sub metering for major loads, high efficiency motors and pumps, solar installations, and energy efficient building design or retrofits.

For DMC ports, energy can be a significant operating cost categories. Efficiency measures may offer favorable returns on investment while simultaneously reducing GHG emissions and improving operational reliability. Even small ports can achieve savings through targeted interventions, such as LED lighting and basic energy management.

Energy efficiency is among the most cost effective pathways for ports to reduce their environmental footprint while potentially improving financial performance. Port operations consume substantial electricity for container handling equipment, refrigerated container (reefer) power, lighting of extensive yard and berth areas, warehouse operations, and administrative buildings. Diesel and other fuels power mobile equipment, vessels at berth (where shore power is unavailable), and backup generation.

LED lighting upgrades represent a high impact, low risk intervention. Port yards, access roads, and warehouses typically operate lighting for extended hours, and LED conversion can reduce both energy use and maintenance. In the NPorts pilot at Emden, LED lamps cut modeled electricity use by about 26 percent, and smart controls cut a further 17 percent (NPorts, 2021). Smart controls, including motion sensors, timers, and daylight harvesting, can further optimize consumption by adjusting output to actual demand.

Sub metering for tenants and major electrical loads enables granular tracking of consumption, supports energy cost allocation, and identifies high consumption equipment for targeted upgrades. Energy management systems aligned with ISO 50001 provide a structured framework for setting targets, monitoring performance, and driving continuous improvement (ISO, 2018).

Efficient motors, variable speed drives (VSDs), and optimized pump systems can reduce energy consumption in cargo handling equipment depending on equipment type and operating conditions. Solar photovoltaic (PV) systems installed on warehouse roofs and administrative buildings provide renewable energy that offsets grid consumption; this is particularly effective in ASEAN's high irradiance tropical climate. For remote or island ports, standalone solar systems with battery storage may reduce reliance on diesel generation.

International ports have reported savings from energy efficiency measures. Niedersachsen Ports in Germany, for example, piloted smart LED lighting in Emden (NPorts, 2021), and the Port of Antwerp Bruges complex also reports energy efficiency measures (Port of Antwerp-Bruges, n.d.). In Southeast Asia, PSA Singapore has installed solar photovoltaic systems at Pasir Panjang Terminal and Tuas Port, which it reports help reduce more than 2,200 tonnes of carbon emissions annually (PSA Singapore, n.d.). Laem Chabang Port in Thailand set a Green Port Project goal of reducing CO2 emissions and energy use from port activities by 10 percent by fiscal year 2019 against a 2013 baseline (Teerawattana and Yang, 2019).