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Building Services Report Module

   

Added on  2020-04-13

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Higher National ConstructionYear 1 Level 4 AssessmentModule:Building Services ReportModule Number:AURH 446Dated:21st October 20171

Higher National ConstructionYear 1 Level 4 AssessmentIntroduction Design of essential building services is often required to comply with the minimum standardsand requirements. In this report, a project on refurbishment of the existing building byinclusion of the essential services is hereby pursued following a request by a client to offerselection advice for the building services installations proposed at the Edleston Road, Crewerefurbishment project as shown in figure 1. The location of the old Victorian buildings atEdleston Road, a disused former primary school, with the intention of converting them intoflats in 2012, but due to delays in obtaining planning approval, negotiating finance andcommitment to prior projects, design finalisation and selection of services was to be done.Hence the full consulting report is hereinafter provided. Figure 1: The buildings for refurbishment The Legislative and Technical Compliance Standards and Requirements Notably, the selected HVAC system is supposed to have a centralized plant configurationhence central system with gas-fired is considered as the project in this case (Hawkins, 2017):Table 1 provides various legal and technical standards and requirements.Table 1: The technical and legal requirements in HVAC systems design and installationTable 1a: The technical requirementsElementsTechnical Boiler interlock The system controls should be wired to economize on spaceand ensure no demand for extra space2

Higher National ConstructionYear 1 Level 4 AssessmentZoning For more than 150m2 of floor area, at least have two zonesotherwise single space is okay for 150m2 or less of floor spaceHeating controlsSystem real-time regulation to be done in an independentfashion; provide room thermostats for automatic controlsHot water controlsProvide this from the hot water storePipesInsulate to minimize heat loss and ensure maximum heattransfer to the designated areasRadiator Check for capacity requirements first For the new heating systemBoiler interlock be installed based on the system requirements Secondly, the HVAC general system requirements for this project case should be as follows: An energy efficient system: Should select a system that is most efficient but reliablehence solar heating systems should be incorporated as a substitute for the gas heating.Besides, thermal ventilation losses will be minimized through a concrete design; heatrecovery unit, for instance, is to be incorporated so that the indoor unit temperature todrift as climatic conditions change so that system exhaust and supply stays flexibleMinimized project cost: One way will be to go for affordable materials butperformance is relatively okay. Notably, ensure overall carbon footprints are reducedand a payback period is justifiable. System to be Purpose-driven: As mentioned early, ensure system is flexiblethroughout the seasons. For instance, it should be such that during summermechanical cooling can be reduced effectively through an improved indoor air qualityexchanges and ventilating systems. Smooth integration with other elements: For example, allow design to be smoothlysupported by the building facade and the glazing type; as this would dictate thethermal, ventilation and lighting needs. The building fabric should be integrated forthe sake of additional comfort Contaminant-free system: Ideally, system is supposed to operate with zerocontamination of any form; however, the type of refrigerant and the systemconfiguration may expose users to undesired contamination due to poor design andmaintenance. For example, ducting must be such that they can easily be broken apartfor repair and maintenance on a regular basis. Additionally, the designer will need to identify all possible points of contaminationand provide safety precautions; also design must secure the health and comfort of theoccupants during operation (CISBE, 2017). For instance, mechanism for draughtremoval should be included in the design. Table 1b: The Legislative StandardsElementsStandards Fan powerChoose 0.5W/l.s for continuous supply ventilation systems Heat recovery For a balanced mechanical system, it should not be worse than70%Controls Either automatic or manual 3

Higher National ConstructionYear 1 Level 4 AssessmentFor heat pumpsAir source systems should be selected if air to water heatingprovisions in the water heating system is requiredUnder floor : supply temperature should be in the range of30oC to 40oC Installation/Commissioning Pipe work insulation for heat loss minimization Efficiency maximization can be done via return operation witha low loss manifold systemDomestic hotwater Supply water temperature between 60oC to 65oCControl Mechanism forsafety in: Water pump operationFan operation Defrosting Protection against waterflow failureFor cooling purpose For air cooled conditioners; EER should be greater than 2.4Overview and Comparison of Suitable Traditional and New SustainableTechnology The solar thermal systems technologies are the sustainable technology while the traditionaltechnologies are like the gas heating. In the solar thermal systems technologies; theynormally operate at relatively higher efficiency and reliability than the old system. Thesystem is normally used to raise the temperature of a fluid, which can either be air, water or aspecially designed fluid; this is allowed to pass its heat directly to water for heating or spaceheating/cooling applications (HM Government, 2013). This is sometimes done via a heatexchanger. Besides, heat storage mechanism is also provided such that supply of heat is stillpossible even when sun is not available. As for the gas heating system it utilizes gas fuel todirectly heat the water boilers and raise the temperature of water within the boiler. Theharmful exhaust gases are becoming a huge concern to the environmentalist as the climatechange menace continue to soar hence more sustainable technologies such as solar thermalsystems have been pursued further (Maguire, Fang, & Wilson, 2013). In this section, acomparison is done between the solar thermal systems and gas heating systems: I.Heating Table 2: New versus the traditional sustainable technology New technology (Solar heating)Traditional technology(Gas heating) Relatively lower calorific value Higher calorific valueNo exhaust fumes hence greener/environmentally friendly Harmful exhaust leading to increased carbonfootprintsHigher efficiency Lower efficiency 4

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