Energy Management
Electricity, which is a source of greenhouse gas emission, is the most significant resource consumed on PolyU campus. Being the University's central agent for the management of the facilities associated with built environment, the Facilities Management Office (FMO) has been taking a leading role in ensuring electricity used to maintain the activities and services carried out on campus is consumed in a prudent manner.
Some of those essential energy saving measures that have been implemented by FMO is last few years are as follows:
- Replacement of existing T8 fluorescent lamp with T5 lamp;
- Replacement of fluorescent-lamp-lit exit signs with LED;
- Removal of surplus lightings;
- Installation of power factor correction equipment (Capacitor Banks);
- Partial lift services during building closing hours;
- Installation of Energy Management Device for Lift Cars;
- Replacement of air-cooled chiller with water-cooled type;
- Provision of thermostat for ON/OFF control of mechanical ventilating fans in plant rooms;
- Application of variable speed drives for CO2 based demand control of fresh air supply and variable chilled water flow;
- Provision of dual-technology occupancy sensors for ON/OFF control of lightings and air-conditioning equipment in teaching rooms;
- Incorporation of Water-Mist Saver (WMS) Installation into existing air-cooled chiller;
- Incorporation of Heat / Energy Recovery Unit in air handling units and primary air handling units.
Other than applying various state-of-the-art energy saving technologies. FMO has also implemented different operational plans to save energy. The details are as follows:
- Cleaning regularly the cooling coils and fins to ensure that they are operating efficiently;
- Cleaning regularly all air filters to ensure no clogging with dust;
- Checking regularly the thermal insulation to identify any damages and loss of integrity;
- Checking regularly all automatic temperature controls to ensure that they are operating properly;
- Provision of digital display type thermostats with limited range of adjustment by the end-users;
- Supply users with point-type thermostats indicate explicit information about the desirable room air temperature and relative humidity;
- Running a FMO in-house Energy Management Team to continuous monitor, review, study and implement various energy saving initiatives;
- To provide secretarial and technical supports to the Energy Management Sub-committee under Health, Safety and Environment Committee;
- Issuing announcements and pamphlets to all students and staff on campus promoting the awareness of energy conservation;
- Participating in various energy saving campaigns organized by HKSAR Government or NGOs. So far, we have taken part in the following events:;
- Survey for Energy consumption Indicators and Benchmark for Universities - Oct 2003 by EMSD and HKU;
- Power Smart Competition - June 2006 by Friends of Earth;
- Energy Conservation Charter 2006 - Suitable Room Temperature by EMSD;
- The Hong Kong Energy Efficiency Registration Scheme for Buildings - October 2006 by EMSD;
- Benchmarking in energy consumption against other local universities – 2004/2005, 2005/2006 and 2006/2007 through Tertiary Education Facility Management (TEFMA), Australia .
FMO, together with CDO, will continue implementing various energy saving measures in the coming years. Major initiatives include:
- Provision of external shading devices such as canopy, fins, etc to control excessive solar radiation entering the building;
- Incorporation of electronic descaling unit applied on chilled water system;
- Addition of pressure differential pressure control valves to chilled water branch circuits;
- Feasibility study on replacing the existing air-cooled chiller with ice-storage chiller in Phase 2 Building;
- To continue the collaboration with BSE research teams to incorporate their energy saving initiatives into the existing building services installation or designs for new projects.
Should you require additional information on the maintenance of indoor air quality, please feel free to contact our FMO colleague at 2766 7235.
USEFUL LINKS
Enquiry
Associate Director of Facilities Management (TS)
Tel : 2766 7235
Fax : 2364 8514
E-mail : fmkktam@polyu.edu.hk
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