代写BENV0001 – Energy and Carbon in the Context of Sustainability代做迭代

Coursework – Module BENV0001 – Energy and Carbon in the Context of Sustainability

C/W 01: Decarbonising an Existing Dwelling

The specific aims of this project are to develop an understanding of;

· how to model current energy performance for domestic buildings,

· the effect of different retrofit measures on domestic building performance,

· how to evaluate the impact of different retrofit packages, considering factors such as emissions & costs,

· how retrofit strategies vary across different scales, and across different building characteristics,

A local authority in North London has selected the EDE students to evaluate the performance of the council’s social housing stock, and examine the options for transitioning towards Net Zero. To ensure that a reasonable sample of their stock is evaluated by the cohort, you have been randomly assigned one of 4 dwelling types (a detached house, an end-terrace house, a mid-terrace house, or a flat) constructed in one of 4 age bands (pre 1900, 1930 - 1949, 1976 - 1982 or 1996 - 2002). Drawings for each dwelling type (including plans & elevations), as well as information on the general assumptions for each construction age band (existing building thermal envelope, systems, etc.) are provided on the BENV0001 Moodle page. The assignments of type & age bands are also available on Moodle.

Based on the details and tools provided, please complete the following tasks.

Task A: Evaluate the retrofit options, and develop a cost-effective decarbonisation strategy for your building

For your assigned dwelling, please do the following:

1.  Assess the current annual performance of your building.

a. Space heating demand should be modelled using IES.

b. Other uses, such as water heating, lighting and appliances can be modelled in IES or estimated using simple assumptions.

c.    Convert the modelled energy use into annual emissions and running costs, using current & projected fuel characteristics.

2.  Assess the retrofit potential for your building.

a. Retrofit packages considered should include different combinations of envelope improvements (e.g. added insulation or draught proofing), systems changes (e.g. changing the heating plant), and renewable technologies (e.g. rooftop PV). Please assess at least 4 packages; (i) a package with only fabric measures, (ii) a package with only new heating plant, (iii) a package with fabric measures + new heating plant, (iv) a package with fabric measures, new heating plant + some renewable technology.

b. Model the impact of any changes in space heating demand by tweaking your IES model. The impact of systems changes and renewable technologies can be modelled in IES or using simple rules of thumb. Convert the estimated ‘improved’ energy use figures into annual emissions and running costs.

c.    As best you can, estimate the capital cost associated with your suggested improvement packages.

3. Reflect on the pros and cons of each retrofit package.

a. Alongside the impact on emissions, consideration should also be made on the total capital costs, and projected running costs, as well as any practical challenges or limitations you see.

b. Consideration should be made of the differing requirements of the building owner (the local authority), the occupants (social housing households), and any other key stakeholders.

The development and running of the IES model (for step 1a) will be supported during Computing Week. General assumptions for the current characteristics of the homes for IES modelling are provided on Moodle. Other guidance and data sources (for steps 1b, 1c and 2c), and the simple calculations that can be used to assess the impact of new systems and renewables (for step 2b) will be provided during the tutorials following computing week.

Task B: Examine how the impact of different retrofits varies across the social housing stock

For this, collect the current and post-retrofit results from 3 of your colleagues (either 3 students modelling the same dwelling type but different age bands, or modelling the same age band but different dwelling types). So, for example, if you are modelling a flat constructed in 1930 – 1949, then you could either (i) get results from colleagues who have modelled flats but in age bands ‘pre 1900’, ‘1976 – 1982’ and ‘1996 – 2002’ or (ii) get results from colleagues who have modelled ‘1930 – 1949’ constructed end-terrace, mid-terrace and detached houses. Comparing your results and theirs, consider and discuss the following:

1. How do the estimated impacts and costs of different retrofit packages vary across the sample of results?

2. What might drive the observed trends? Consider factors like the underlying assumptions, the building characteristics, and the specific details of retrofit packages.

3. What might this mean for the council’s goals for retrofitting their social housing stock as a whole?

Please note, you do not need to check or repeat the modelling carried out by your colleagues.

In your report, list which students you have shared results with, but refer to them only by their candidate codes. Do not mention their or your names.

Report

Present the results as a report, describing what you have done and your findings for each of the tasks. An introduction should place the project in the general energy context that we have covered during this module, and a conclusion should reflect on the tasks as a whole with consideration of the brief (e.g. what should the North London local authority take away from your work?).

Outside of the overall IES model, any data you find can be used in your analyses. However, try to find primary sources wherever possible. You must include a clear references (Harvard style) for all sources used.

The total length of the report, inclusive of appendices, tables and diagrams, but excluding your list of references, should be no more than 10 A4 pages. You do not need to include an abstract, summary or table of contents. Appendices are allowed but should only be used to supplement the main contents where appropriate.

Submission

Please submit your report electronically via Moodle, the submission deadline is below.

Module	BENV0001: Energy and Carbon in the Context of Sustainability
Coursework	Decarbonising an Existing Dwelling
Weighting	50% of marks for the module
Page Length	10 pages in total [1500 words]
Coursework Issued	Tuesday 14th October
Submission Deadline	11:00 am, Wednesday 19th November (there will also be an informal interim submission in early November, following computing week, to discuss the initial modelling)