SAV/CHP/SAV-106259/RS/25.06.2014 Claremont Hotel - plantroom 1 LoadTracker CHP (XRGI 20G) - CRA (Carbon Reduction Assessment)
Please note that the results presented in this assessment are specific to XRGI 20G LoadTracker Number of CHP units at 20 kWe
1
Recommended heat storage vessel
at least 500 ltr per CHP
Type of usage
Hotel
Data reference
Mike Glanfield 17.06.2014
of
Epsilon
on
1.0 Summary of Usage: Annual electricity consumption
198,036 kWh
Electricity price (without CCL)
13.53 p/kWh
Annual gas consumption
263,089 kWh
Gas price (without CCL)
5.114 p/kWh
1.1 CO2 Emission Factors used: • For grid electricity = 0.519 kg/kWh • For grid displaced electricity = 0.519 kg/kWh • For gas = 0.216 kg/kWh 2.0 Carbon Footprint of Project User Centre: CO₂ (conv)
159,608 kg CO₂ pa
CO₂ (CHP)
134,047 kg CO₂ pa
160,000 140,000
(a)
(b) 25,561 kg CO₂ pa
120,000
kg CO2/year
Net reduction
Carbon Footprint
100,000 80,000 60,000 40,000 20,000 -
Conventional Gas (CHP)
Gas (boiler)
LoadTracker Grid electricity
By introducing a CHP, a reduction of 25.6 tonnes of CO₂ emissions (25,561/159,608 = 16%) could be expected relative to a conventional mains supply/gas boiler system. Notes: (a) = (electricity consumption x 0.519) + (gas consumption x 0.216) =(198,036 kWh x 0.519) + (263,089 kWh x 0.216) = 159,608 CO₂ pa (b) = (CHP gas consumption x 0.216) + (supporting boiler gas consumption x 0.216) + (electricity consumption x 0.519) - (CHP electricity production x 0.519) =(318,545 kWh x 0.216) + (44,725 kWh x 0.216) + (198,036 kWh x 0.519) - (90,945 kWh x 0.519) = 134,047 kg CO₂ pa
3.0 Cost Savings: Comparisons are shown between the operational costs of a conventional system (mains supply/gas boiler) and 1 x LoadTracker 20G CHP unit.
Operational Cost Electricity Gas (Boiler) Gas (CHP)
0
Total
£40,249
CHP £14,489 (d) £2,287 (f) £16,290 (g) £33,067
50,000 40,000 30,000 20,000 10,000 £/year
Conv. £26,794 (c) £13,454 (e)
0
Conventional Gas (CHP)
LoadTracker
Gas (boiler)
Grid electricity
The use of LoadTracker CHP would result in annual savings of £40,249 - £33,067 = £7,182 pa relative to a conventional mains supply/boiler system. Notes: (c) = 198,036 kWh x 0.1353 £/kWh = £26,794 (d) = Assessed by LoadTracker programme (e) = 263,089 kWh x 0.05114 £/kWh = £13,454 (f) = Assessed by LoadTracker programme (g) = Assessed by LoadTracker programme 4.0 LoadTracker CHP Contribution to Electrical Needs of User Centre Typical seasonal variations in electricity consumption have been assumed, in producing an approximate consumption pattern for the User Centre. 20,000 18,000 16,000 14,000 12,000
kWh/month
10,000 8,000 6,000 4,000 2,000 ‐ Jan
Feb
Mar
Apr
May
Site electricity demand
Jun
Jul
Aug
Sep
Oct
Nov
Dec
LoadTracker electricity production
CHP accounts for 90,945 kWh / 198,036 kWh = 46% of electricity requirements of the User Centre.
5.0 LoadTracker CHP Contribution to Heat Needs of User Centre Similarly to item 4.0, typical seasonal variations in heat requirements have been assumed. The CHP LoadTracker units can maintain a similar profile for heat production, as shown below:
30,000 25,000 20,000
kWh/month
15,000 10,000 5,000 ‐ Jan
Feb
Mar
Apr
May
Jun
Site heat and DHW demand
Jul
Aug
Sep
Oct
Nov
Dec
LoadTracker heat production
6.0 Heat Balance for User Centre Heat consumption by User Centre Heat production (CHP) Heat production (boiler) Consumption by boiler
223,626 kWh (h) 185,609 kWh (i) 38,016 kWh (j) 44,725 kWh (k)
Heat Balance Boiler 38,016 17%
CHP 185,609 83%
It can be seen that CHP account for 185,609 kWh/223,626 kWh = 83% of heat requirements of the user Notes: (h) = 263,089 kWh @ 85% (assumed boiler efficiency) = 223,626 kWh (i) = Assessed by LoadTracker programme, to give max possible CHP usage (j) = Net difference (h) - (i) (k) = Heat production (j) factored up assuming 85% efficiency = 38,016/0.85
Appendix CCL = Climate Change Levy. Extemption from this is granted to projects containing good quality CHP. Site Electrical Consumption:
May‐13 Jun‐13 Jul‐13 Aug‐13 Sep‐13 Oct‐13 Nov‐13 Dec‐13 Jan‐14 Feb‐14 Mar‐14 Apr‐14 Total
El. for Electricity for plantroom 2 plantroom 1 20,922 16,438 18,071 14,199 21,185 16,645 22,786 17,904 22,383 17,587 21,235 16,685 21,420 16,830 20,849 16,381 21,498 16,892 21,840 17,160 18,368 14,432 21,487 16,883 252,045 198,035
Site Gas Consumption:
Mar‐12 Apr‐12 May‐12 Jun‐12 Jul‐12 Aug‐12 Sep‐12 Oct‐12 Nov‐12 Dec‐12 Jan‐13 Feb‐13
23,177 19,764 20,424 16,813 16,897 11,979 16,715 19,730 23,043 4,394 58,344 31,809 263,089
As there is unsually high gas reading in December and very low in January I added them up and split equa