Energy and Climate Change

The most consumed energy at Universitas Sumatera Utara is electrical energy. It is consumed by household appliances and electronic devices such as lamps, computers, projectors, refrigerators, air conditioning units, and electric motors. In recent years, household appliances and electronic devices have been gradually replaced with highly efficient devices. Images of some of the highly efficient devices are shown in the image below. Based on the field survey, the use of energy tools has been around 30%.
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Use of energy efficient equipment

The smart building concept at USU adopts an automation system known as the Building Automation System (BAS). Intelligent Building Automation System refers to the use of information technology and computers to control equipment in a building. Intelligent automation such as automatic doors, timer systems to automatically turn on/off lights at predetermined or set times, automatic fire alarm systems, and automatic systems with timers for exterior corridor lights. Several USU buildings also use a centralized monitoring system for air conditioning and electrical control.

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The medical gas installation is one of the vital utilities in the hospital which consists of oxygen gas, CO2, medical compressed air and vital medical vacuum air with the risk of explosion if the pressure and distribution do not meet the standards. Therefore, a digital-based control system is applied to an integrated gas distribution installation with digital alarms to monitor and prevent all risks early. digital medical gas system can save money and efficient in use.

Automatic Alarm for Medical Gas Control Room
In addition, in the current pandemic conditions and the need to prevent the spread of the Sars Cov-2 virus, a sink was created that can be used automatically without touching the faucet.

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At USU, there are three renewable energy sources that have been produced on campus:
1. Biogas power plant (Power capacity 10 kW)
2. Electricity from solar panels (Power capacity 15 kW)
3. Electricity from speed bump (Combined Heat and Power) (less than 100 Watt)

Biogas Plant 1

Speed Bump

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Biogas power plants are used to convert waste into biogas. Biogas is used as a Power Plant (Genset) to provide electrical energy when the main electricity from the National Electric Grid is not available. Solar panels are found in the Chancellor's Bureau (10kW capacity), Mechanical Engineering Laboratory (2 kW capacity), UPT Roofing Integrated Research Laboratory (1 kW capacity), and are found in lighting along the road at the University of North Sumatra (approximately 2 kW capacity). The energy produced by solar panels is around 50 kWh per day, so the electricity generated by solar panels can reach 18,000 kWh per year. This percentage of electricity is around 3.48% of the total electricity usage at USU, which is 516,374 kWh per year. In addition, some of the electrical power generated by the speed bump is used to charge the cellphone battery. The renewable energy plant is shown in the image above.


The difference has been felt in the socialization program and the implementation of the electricity consumption reduction campaign. In the period October 2019 to September 2020 there was a decrease of more than 27% compared to the previous year.

 

Most of the buildings of the University of North Sumatra use natural sunlight for interior lighting. Some buildings with cantilever floor designs provide shadows on the floor below to reduce the heat of the sun. The use of natural sunlight can also reduce the consumption of electrical energy during the day.

Full Natural Daylighting in Central Administration Building USU
The USU Hospital Lobby is designed with a hot attic chimney system to allow natural air circulation from the ground floor to the roof. Make the lobby cool and comfortable without using electric AC.
Natural ventilation in hospitals occurs due to differences in air pressure and temperature to move air. The design element uses the inner court with a ratio of 1: 1 to the height of the building so that the planted inner court grass remains shady during the day to reduce the micro temperature to 30C. The temperature difference between the indoor and outdoor courts moves air through hospital corridors and rooms.

In the period March 2020 until now, the operation of the campus bus has been stopped and all students have been and are conducting lectures from home. This certainly reduces the carbon footprint contributed by buses, cars and motorcycles. In addition, it also has an impact on classrooms that no longer use electrical energy for lighting or air conditioning. So the total carbon footprint at the University of North Sumatra is equal to 0.01 Tons of CO2 per capita per year.