Submission Format: Any material that is derived from other sources must be appropriately referenced using a standard form of citation. The final page(s) of your presentation notes should include a bibliography of any texts used in support of your research. This is to be presented according to an academic standard reference format. Unit Learning Outcomes: LO4 Evaluate the performance of a given building in respect of its human comfort requirements. Assignment Brief and Guidance: Scenario You are employed by a large general contractor, as a Design Build Technician. The company has recently appointed a new Managing Director who has decided to shift the company's focus towards greater use of sustainable practices. To achieve this, the Managing Director has asked a number of staff to prepare presentations on how to improve sustainability within the construction process. You have been asked to prepare a presentation on 'Improving Sustainability through Material Selection.' Tasks The submission comprises two related items: Section1 - With regard to human comfort, evaluate the performance of selected materials; use calculations to show the performance of materials for human comfort. Section 2 - Illustrate how the environmental rating of a building can be improved through the use of sustainable materials, evaluating the use of passive and active strategies to minimise resource usage. (P7) Present a material selection strategy with regard to human comfort requirements. (P8) Using the selection strategy specify material choices for a selected area.
Human comfort factors are essential in buildings in which we occupy, therefore calculate the following to either establish values or achieve compliance; Calculate the 'U' value for the cavity wall shown and given performance criteria; Surface Resistance Surface Resistance Brickwork Air Concrete Block Plaster Insulation Values of Thermal conductivity are in W/mK; 0.18 Lightweight Plaster Aerated Concrete block Insulation Board Brickwork 0.11 0.025 0.77 Standard Thermal Resistances in mºK/w; 0.12 Internal surface External surface Cavity 0.06 0.18 Wall Specification: External Brick 102.5mm Air Gap 35mm Concrete Block 100mm Lightweight 12mm Plaster
Using the information calculated, and using the information below, calculate the following: 0 Fabric heat loss (1) Ventilation heat loss () Total heat loss in kilowatts -1°C 10.6 7.8 21°C 1.4x0.8 3.6x0.8 2x0.6 2.5x0. 2.8m 3.4m 4.5m Assume 1.5 air changes per hour U-values Floor Roof Windows Door Walls 0.55 0.4 2.4 1.65 as calculated A workshop with 175 watt low pressure sodium vapour lamp at 3 metres above floor. The Sodium vapour lamp efficacy is 142.8 lumens per watt Calculate illuminance directly below and 4 m to the side of lamp This same workshop has just taken delivery of a new milling machine. It is intended that it will operate alongside another milling machine. Concern has been raised as to what impact the new machine will have on current sound Hevels. Current Machine 80dB New Machine 77dB To ensure compliance you are to calculate the combined sound levels.
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