GENERAL Energy Conservation Procedures User-group: Permanent Academic Staff, Part Time Hourly Paid Academic Staff, Permanent Support Staff, Temporary Support Staff. Category: General. Review Date: April 2009. Approved By: Academic Board. Commissioning, Estates Manager. Contact Person: Brian Newton, 01274 433075. Person Responsible: Andy Welsh, Director of Corporate Services: Directorate. College Mission Statement: To help students from the region, nationally and internationally, achieve their potential, and make a rewarding contribution to their own communities. Our Vision Bradford College is aiming to be recognised as one of the UK's foremost colleges. It will have a unique range of courses extending a ladder of continuing provision from basic education to postgraduate degrees. Competing with prestigious colleges and universities across Europe, Bradford College's global influence will grow as its international recruitment expands. This will be enhanced through an enlarged student population drawn to the region by its shortly-to-be inspirational campus located at the heart of the regenerated city centre. Our Strategic Objectives To accomplish the transformation of Bradford College we will: 1. Build a new Learning College modernising our traditions of service to the region 2. Focus the professionalism of all our staff on meeting the high standards of a Quality College 3. Open our doors to welcome the entire community into Bradford's Inclusive College 4. Listen carefully to the voice of learners as we fashion the Responsive College 5. Give employers skills and the enterprise they want from a ready for Business College 1
EXECUTIVE SUMMARY: DEFINITIONS: Jargon/Key word Definition DHW BMS Calorifier Louvre Montreal Protocol 0DP AC VRF VS VDU PIR System Domestic Hot Water Building Management System A heat conversion device to provide hot water. Sloping slats placed across an opening to allow air movement whilst providing weather protection. Declaration of intent. Zero Depletion Potential Air Conditioning Variable Refrigerant Flow Variable Speed Visual Display Unit Passive Infrared Category 2 Luminaries TRV Thermostatic Radiator Valve Carbon Footprint 2
PROCEDURE TITLE: Energy Conservation Procedures 1. General Introduction and Application This estates services design guide applies to all designs undertaken within the estates by our in-house staff, contracting staff or consulting services engineers, engaged either as a single commission or as a member of a design team engaged on a major project. 2. Environmental Criteria The following environmental criteria are to be applied throughout the College estate unless stated otherwise in respect of individual elements of a project: Winter: Internal Temperature 18 C 20 C against an external ambient -1 C; Summer: Internal Temperature not to exceed + 5 C above external ambient in both naturally and mechanically ventilated areas (no upper and lower limits for humidity are set in respect of above). 3. Hot Water Services 3.1 The college policy is to close as far as practicable; all central heating plants during the summer, and provides domestic hot water from separate systems. 3.2 This does not preclude the use of central heating plant for DHW raising during the heating season, although with additional capital expenditure on plant and increased maintenance costs this arrangement will tend to cease. It is not the preferred arrangement, unless winter demand is high and substantially higher than the summer demand and there is a positive cost benefit for using this arrangement. 3.3 The preferred method of DHW raising is either to provide separate central plant, such as instantaneous gas fired hot water generators or local point of use equipment using either gas or electricity. 3.4 If DHW demands are high, such as in kitchen areas or sports facilities, then modular (staged) systems using a group of instantaneous gas fired hot water generators are to be specified. 3.5 If DHW is to be used from the central boiler plant, then plate heat exchanges are to be used in preference to standard calorifier with primary coil arrangement. 3
3.6 All DHW that has a storage capacity in excess of 10 litres must be fitted with a time clock control; via the college BMS to prevent the stored water being heated out of hours. 4. Ventilation 4.1 All areas of every building must be properly and adequately ventilated with fresh air or a mixture of recalculated air and fresh air. 4.2 It is a requirement that as far as practicable, ventilation is to be achieved by natural means including opening windows, transfer grills and fixed louvers, with this arrangement applicable to offices, common or seminar rooms and general circulation areas. 4.4 Mechanical ventilation will more usually be provided to laboratory areas, lecture theatres and large seminar rooms. 4.5 In all toilet areas ventilation is to be by mechanical means and the system is to be extract only with make up air drawn via transfer grills from other parts of the building. 4.6 Similarly for smaller areas such as stores, plant areas, smaller offices and machine rooms extract only systems are preferred. 5. Refrigerants and AC Equipment The use of refrigerant gases in mechanical services plant is covered by the Montreal Protocol and amendments issued by the European Commission. The college wishes to comply with this criteria and all consultants working on its behalf are required to do so. In effect this means that refrigerant gases with a low or zero depletion potential (0DP) must henceforth be specified in all mechanical services plant, and gases coded R11 and R12 may not be used under any circumstances and R22 only offered on small cassette type systems if no alternative system / supply is available. All AC units should be of the VRF or VS type and only in exceptional circumstances should fixed speed units be fitted. AC units for individual comfort cooling will not be installed 6. Lighting 6.1 All lighting unless agreed with the College s Estates department is to be a high frequency fluorescent system with exception of toilets, plant spaces, voids or other non-operational areas which are to be fitted with other forms of low energy lighting, such as mini fluorescent systems. 4
6.2 In general, the selection of type of luminaries may be at the discretion of the Estates department. However the use of low brightness, sharp cut-off luminaries with high specular efficiency will be required in areas where there is or expected to be significant use of visual display units. The use of Category 2 luminaries is the preferred system for VDU use. 6.3 For all new buildings and major refurbishments, the design and installation, particularly to switching must be either by occupancy, PIR system, or BMS control. The use of dimming control in computing rooms or lecture theatres is acceptable. Because of the short life of tungsten lighting systems, these are not to be used in plant areas or service areas for general lighting. Fluorescent systems must be installed. The advantage of natural light to be used wherever possible at all times. 7. Thermal Insulation Thermal insulation must be used and specified on all services as follows: a) All heating pipe work; b) All hot and cold water distribution pipe work; c) All cold water rising mains in unheated areas; d) All refrigerant pipe work; e) All hot water cylinder and calorifiers; f) All water storage tanks; g) All ductwork that has heated air streams present; h) All isolating valves on heating pipe work to be fitted with shrouds. Building insulation to be used wherever possible to maximise heat loss and minimise heat gain within a building i.e. double glazing, solar film, and roof insulation. 8. Energy Efficiency 8.1 All designs undertaken by consultants or design engineers, on the behalf of the college are to be as energy efficient as reasonably practicable. The elements that constitute an energy efficient design or building will depend on a large number of factors, but the following need to be considered as a minimum. (Please see items 8.2 to 8.9 below). 8.2 All heating plant should be carefully selected to be of high operating efficiency and configured and controlled by the BMS to give high operating efficiency at part load conditions (This may mean multi-modular boiler installation). 8.3 All heating radiators should be fitted with TRV control valves. 8.4 All domestic hot water plant should be of high efficiency, make minimum use of stored hot water and be as close to points of use as possible. 8.5 All domestic cold water services shall be by gravity, pumped systems are to be avoided. 5
8.6 All toilets and urinals are to be fitted with a flushing control system and all wash basins to be fitted with concussive taps. 8.7 The use of energy efficient electric motors with low iron, copper and windage losses are to be installed 8.8 The use of high frequency control gear for all fluorescent lighting systems is a standard requirement. 8.9 Low energy light sources will be required in all other installations not using high frequency fluorescent lighting systems. Tungsten lighting will only be acceptable in specific and identified areas where there is a very limited use. 9. House Keeping 9.1 Good housekeeping is a fundamental principle and the simplest form of energy saving measures that can be adopted without incurring any cost implications. Measures such as turning off lights in rooms that are not occupied, turning off computers and printers which are not in use, electrical items that are left on standby can use has much as 80% of their current power rating. 9.2 Other measures, such as closing windows when leaving rooms and closing doors all contribute to retaining heat loss within areas. If a room is too hot turn off the radiators. Simple measures such as the above all contribute to reducing our carbon footprint and can reduce our energy costs by as much as 20%. 9.3 Other aspects of good house keeping are staff should be observant, by reporting dripping taps, windows that are broken or do not close, do not leave it to someone else. 6