Energy audit results of Danang Rubber Joint Stock Company
19/09/2019
Solution No.1: Installing hydro ball auto clean system for cooling water loop | |
Real situation - Chiller system has many mosses leading to deposits caused by sea breezes intrusion; - Condenser Approach Temperature is high 3.3°C (<2°C); - 2 condenser pumps run at the peak-time load to improve cooling load of condenser causing energy waste; - Cleaning condenser of chiller need to be done regularly. | Expected output Installing hydro ball to condenser tubes and monitoring the condenser approach temperature result in 10% saving from chiller energy consumption. |
Energy saving results | |
Electric power savings: 448,800 kWh/year | Investment cost: VND1.2 billion |
Cost savings: VND705 million/year | Payback Period: 1.7 years |
Solution No. 2: Recovering wasted heat of the condensate for steam saving of AHU | |
Real situation - 9 AHUs use 3 bar steam for humidity control; - Flash steam has not been recovered; - Condenser water waste the heat. | Expected output Using condensate water or flash steam to AHU system in state of steam reduces remarkably the amount of steam required for the production process. |
Energy saving results | |
Steam savings: 4,300 tons/year | Investment cost: VND4 billion |
Cost savings: VND3.15 billion/year | Payback Period: 1.3 years |
Solution No. 3: Using Hot Water From Condenser Water To Absorption Chiller | |
Real situation - Condensate water can be recovered from curing machine; - 10m³/h from Bias and Radial workshop with temperature 100⁰C. | Expected output Using hot water from condensate water to absorption chiller results in electrical power savings and energy cost savings. |
Energy saving results | |
Electric power savings: 424,320 kWh/year | Investment cost: VND4 billion |
Cost savings: VND666 million/ year | Payback Period: 6 years |
Danang Rubber Joint Stock Company is one of 10 enterprises entitled to energy audit implementation within the framework of the Project for Promoting Investment Market for Energy Efficiency in Industrial Sector in Vietnam, funded by the Korean Government through Korean International Cooperation Agency (KOICA). The energy audit was conducted from September 10, 2018 to September 21, 2018 by the Energy Conservation Research and Development Center in cooperation with Korean energy experts. |