01-01-2011, 04:52 PM
Amiral Aziz , dan Rizka Elyza Sari
ABSTRACT
ENERGY AUDIT FOR THE AIR CONDITIONING SYSTEM IN THE COMMERCIAL BUILDING.
This papers presents some results of the energy audit was conducted in the commercial building i.e a hotel to recommended measures to decrease energy costs every month by identifying of energy loss. This audit focused on the air conditioning system. The performance of this system was examined to identify opportunities for improved energy efficiency. It is concluded that the thermal room comfort was slightly below the existing standard with the average room temperature ranging between 25 o C to 29.3 o C and the relative humidity ranging from 47.6 % to 54.8 %. The poor performance of two working chillers, indicated by their existing low rates of the Coefficient of Performance (COP) and the Energy Efficiency Ratio (EER), were determined to be responsible for this drop in comfort levels.
INTRODUCTION
An energy audit is an examination of an energy consuming equipment/system to ensure that energy is being used efficiently. Conducting an energy audit can directly benefit commercial building operators and industrial facilities by optimizing energy use and incorporating energy efficient practices which help reduce overall expenses. The efficiency improvement of the steam power plant as well as the nuclear power plant result primary from reduction in waste heat energy losses in the stack gases and expelled water. Procedures that reduce the mass flow and energy content of these flow streams directly benefit unit performance. Other losses occur from surface heat transfer to the atmosphere and incomplete combustion of the fuel. The number of pieces of equipment that required to be run during shutdown is optimized to reduce station energy consumption. Continuous trend monitoring of heavy water and light water collection during reactor operation will help stations in taking appropriate remedial measures.
A hotel is a typical commercial building that behaves quite differently in comparison to other commercial buildings. The energy consumption of a hotel depends on the rate of occupancy and the hotel type. Due to the economic crisis which directly affected the tourism sector in Indonesia, the hotel business experienced significant deflation. The number of hotels decreased to 20% from the year 1997 to the year 2000. To sustain the hotel business from falling into economic crisis, due to rapidly increasing energy prices, it is highly recommended that the hotels participate in energy saving projects and energy efficiency campaigns including energy audits as well. The energy saving project requires an energy audit to be conducted on all systems within the hotel building. It is hoped that the energy audit activity will improve the awareness of energy saving activities especially for star and non-star hotels in Jakarta.
The objective of the energy audit is to find ways to decrease energy costs (electrical and thermal) per month by identifying sources of energy loss within the hotel. It is important to boost the efficiency of every utility component to optimize electric usage.
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