1 / 4

Low Carbon Buildings and Sustainability

Low Carbon Buildings and Sustainability. By Dr David Johnston – licensed under the Creative Commons Attribution – Non-Commercial – Share Alike License http://creativecommons.org/licenses/by-nc-sa/2.5/. LZC Technologies - Answers. Space Heating LZC technologies

bruce-sosa
Télécharger la présentation

Low Carbon Buildings and Sustainability

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Low Carbon Buildings and Sustainability By Dr David Johnston – licensed under the Creative Commons Attribution – Non-Commercial – Share Alike License http://creativecommons.org/licenses/by-nc-sa/2.5/

  2. LZC Technologies - Answers Space Heating LZC technologies a) CO2 emissions (kg/annum) for each LZC technology Energy used = space heating demand / thermal efficiency or COP CO2 emission = electricity energy used x CO2 emission factor Option A GSHP Electricity energy used = 50000/3.5 = 14286 kWh CO2 emission = 14286 x 0 433 = 6186 kg/annum Option B Biomass Thermal energy used = 50000/0.6 = 83333 kWh CO2 emission = 83333 x 0.025 = 2083 kg/annum Option C Gas Thermal energy used = 50000/0.95 = 52632 kWh CO2 emission = 52632 x 0.194 = 10210 kg/annum CoP of heat pump Space heating demand CO2 emission factor Space heating demand Efficiency of bomass boiler CO2 emission factor Space heating demand Efficiency of condensing boiler CO2 emission factor

  3. LZC Technologies - Answers Gas CO2 emissions Space Heating LZC technologies b) % CO2 emission savings for A and B A GSHP % CO2 emission saving = (10210-6186)/10210 x 100 = 39.4% B Biomass % CO2 emission saving = (10210-2083)/10210 x 100 = 79.6% c) Capital costs of each option Capital cost = cost per output x output capacity Option A GSHP Capital cost = £800 x 100 = £80000 Option B Biomass Capital cost = £350 x 100 = £35000 Option C Gas Capital cost = £90 x 100 = £9000 Gas CO2 emissions

  4. LZC Technologies - Answers Space Heating LZC technologies d) Annual running costs of each option Running costs = electricity energy used x electricity cost Option A GSHP Running cost = 14286 x £0.09 = £1286/annum Option B Biomass Running cost = 83333 x £0.04 = £3333/annum Option C Gas Running cost = 52632 x £0.05 = £2632/annum Conclusion It would not be possible at present to justify options A and B on payback period alone. Options A and B may be required in order to secure Building Regulations Part L planning approval. Electricity energy used Electricity cost Wood pellet cost Electricity energy used Electricity energy used Gas cost

More Related