Biography
One of his research focuses is natural refrigerants for environmentally friendly cooling. As we understand, the issue of climate change is becoming increasingly widespread. Rising global temperatures are among the indicators of climate change occurring because more greenhouse gases are negatively affecting the environment. Greenhouse gases are produced by conventional refrigerants released into the atmosphere as a result of increasing dependence on fossil fuels.
Alternative Refrigerants
Hydrocarbons as natural refrigerants are available in abundance. In addition, they do not deplete the ozone layer and are environmentally friendly, with virtually no Ozone Depletion Potential (ODP) and a very low Global Warming Potential (GWP). Research is still being conducted on the drawback of hydrocarbons' flammability; therefore, public understanding of their characteristics is very much needed.
Safe Steps for Comfort
To reduce the adverse effects of conventional refrigerants, society is beginning to shift its cooling techniques toward natural refrigerants that are abundantly available in nature. In addition, they have no potential to deplete the ozone layer. More importantly, they have almost no negative effect on global warming. For example, the GWP of the conventional R22 refrigerant used in residential buildings is 2000, meaning the substance is 2000 times more harmful than CO2. On the other hand, the GWP of hydrocarbons is only 3 — a ratio of 3:2000. Therefore, it is far lower than conventional refrigerants, by roughly a factor of five hundred. Ammonia, CO2, and H2O are other natural refrigerants with more complex characteristics that are not yet commonly used. Hydrocarbon refrigerants, for example, have the drawback of being flammable, which raises public concern. In everyday use, these substances are also found in gas fuels such as LPG. However, because the public is more familiar with LPG as a cooking fuel, they tend to associate it only with cooking. Therefore, it is very important to train technicians in their installation capacity.
Appreciation and Competence
The potential for natural refrigerant use in the future is very promising. It is further supported by the academic community providing more applicable knowledge to the public. More importantly, the government must improve operator competence through the Indonesian National Work Competency Standards, which include a set of competencies that a technician must possess. Besides the need to improve technicians' performance, the public is also expected to appreciate the work of installers so that synergy is created between them.
SBETS UI Research Group
Led by him, SBETS UI (Sustainable Building and Environmental Thermal System) at Universitas Indonesia is a research group focused on technologies related to buildings, concerning the physical processes that affect energy consumption, environmental heat, and air quality in sustainable buildings. The research group has developed an air-conditioning system testing chamber, air-flow simulation using CFD, indoor air quality monitoring and its control strategies, and also investigates the risks in a building's HVAC system. To broaden public understanding of sustainable buildings and to introduce his and his team's research, information about SBETS UI is linked on the page below:
SBETS UI