Transcription of Energy Conservation & Management
1 Energy Conservation & Management Building Management Systems provides its Energy Conservation solution in the most economical and timely manner possible, with minimal interruption to the on-going business and the occupants of the Facility. The Work consists of three Phases as follows: Phase 1 - System status review: For existing buildings: Building Management Systems will perform a Technical Energy Audit and Project Development Plan: Building Management Systems will at this stage review the current system status based on: As-built documentation provided by Client Consumption details for several months (DEWA bills) provided by Client Site inspections Building Management Systems will analyze the system Energy efficiency and provide a list of recommended measures to improve it.
2 If the estimated system Energy efficiency proves to allow for considerable Energy savings, BMS will then forward a proposal for its Energy saving programme For new buildings: Building Management Systems will study the project and propose Energy efficient control solutions in coordination with the Engineering Consultant and MEP Contractor. Phase 2 - Design and implementation For existing buildings: Building Management Systems will manage, design, construct, and commission the project defined in Phase 1, Project Development Plan approved by the Owner, and will provide training to Facility Maintenance and operations staff regarding proper use and maintenance of the designed system. Building Management Systems will prepare a detailed contract that will specify programme implementation details, its cost and duration, scope of work, responsibilities and obligations for both parties, reference values for Energy saving calculation and the actual savings calculation method, guaranteed savings, payment schedule etc.
3 Upon signing the contract, BMS will undertake the implementation of the programme. This includes full design of the Energy Conservation system, supply and installation of all necessary equipment, system testing, commissioning and start-up, verifying Energy savings upon system start-up in consequent months For new buildings: Building Management Systems will manage, design, construct, and commission the project in coordination with the Consultant and MEP Contractor, and will provide training to Facility Maintenance and operations staff regarding proper use and maintenance of the designed system. Building Management Systems will provide full design of the Energy Conservation system, supply and installation of all necessary equipment, system testing, commissioning and start-up.
4 Phase 3 - Warranty and maintenance Building Management Systems will perform all functions necessary to measure, verify, and achieve the Guaranteed Energy Savings. Building Management Systems will perform system fine-tuning for optimum performance and will monitor the system operation (remotely and by visits) during the contract period Building Management Systems can also provide remote operation and maintenance contract upon expiry of the original contract. 1 - conserving Energy on production level Chiller Plant Optimization involves the improvement of the operational eficiency of the total plant consisting of chillers, cooling tower, condenser water pumps and chilled water pumps. Its specialized control algoritms provide: Energy saving.
5 Increase of the system flexibility. Extended chiller plant life, due to reduced operating hours Provides spare capacity for future expansion of the facility. Lower maintenance cost due to reduced operationg hours. Expected Energy saving: 20-30%, without compromising the environmental comfort. Improves facility operation due to full automation of the plant. Improves the facility maintenance due to early indication/warning of any faults or failures. The faults can be rectified even before it becomes problematic. The Universal Chiller Plant Control Solution (CPCS) is an application specific LonWorks DDC based system for capacity and lead/lag control of a group of chillers and necessary peripheral equipment. The system is pieced together using specific interactive modules, one for each type of equipment that makes up a chiller plant, and together with duty coordinating modules and a capacity commander module, is able to sequence all related equipment for the proper functioning of the chiller.
6 FEATURES. CPCS automatically calculates cooling demand from supply/return temperature and the flow rate of chilled water to decide the number of chillers to switch on or off. determines next available chiller, pump and cooling tower to turn on or off in sequence to maintain equal running hours and even wear & tear of each piece of equipment. modulates bypass valve to maintain differential pressure across supply and return headers. System also works with de- coupling systems without bypass valves. eliminates single point failures by having distributed intelligence- each piece of equipment is assigned one DDC- ensuring reliable chiller plant control. automatically avoids activating faulty equipment, relying on serviceable equipment to meet calculated cooling demand.
7 Suitable for all chiller plants piped in common header pipe configuration, even when of quantity of chillers, cooling towers and water pumps are not equal in number ( : in plants with extra standby pumps and or cooling towers). 2 - conserving Energy on distribution level Optimises air distribution in Variable Air Volume (VAV) AHU. Variable static pressure regulator systems thus greatly reducing Energy usage. This is achieved by continually adjusting static air pressure set-points of an AHU as opposed to conventional VAV AHU systems which rely on a fixed static air pressure set-point. Expected Energy saving: 50%, without compromising the environmental comfort. Key Advantages AHU fan runs at lower average speeds resulting in more Energy savings Individual VAV boxes (up to 25 VAV boxes under one controller).
8 Receive just enough cooling air flow resulting in more effective cooling in individual rooms Cooling demand is met more quickly and efficiently Requires no modification of existing hardware beyond installation of the Variable Pressure Regulator Small dimensions - easy panel mount installation. Huge Energy savings at low installation cost Heat Pipes Self-recycling loop coils with easy evaporated liquid. Efficiency: 60-70%. Advantages: No additional Energy required. No maintenance (just cleaning). No cross-link contamination. Low-pressure drop. Operation without additional device. Low investment. The loop connects with a finned-tube coil in the exhaust plenum, Run Around Coils and with a finned-tube coil in the AHU.
9 Efficiency: 45-60%. Advantages: Easy installation (exhaust and fresh ducts shouldn t be close to each other). System can cover more than two ducts Low investment. Low Energy consumption (pump). Low maintenance costs. No cross-link contamination. No mechanical initializing parts (except the circulation pump). Low-pressure drop. Heat/ Energy Recovery Ventilators Incoming and outgoing airflows pass through different sides of the cube-shaped transfer unit, (though airflows are not mixed). This system contains fans for both fresh air and exhaust air. Efficiency: 70-80%. Advantages: Low maintenance costs. No cross contamination. Reasonable level of investment. Low-pressure drop. 3 - conserving Energy on emission level In contrast to conventional DDC control system, that typically controls production and distribution of Energy , room automation is concerned with optimizing the Energy consumption on the emmission side in individual rooms - at the end user location.
10 It is possible to see that the biggest savings can be made if one first avoids uncalled-for Energy consumption in the rooms themselves. Only room automation is able to decide whether a light should still be left on after sunrise or whether a radiator should be turned off, because a window has been opened to air the room. In this way, room automation is the most important tool in improving Energy performance! Room automation provides: more Energy efficiency more productivity more flexibility Using a whole bundle of partial functions, room automation automatically reduces heating, cooling or electrical power requirements as a function of the room utilization and the free Energy sources available, such as sunlight or cool night air, to a minimum.
