SAV/CHP/SAV-106259/RS/25.06.2014 Claremont Hotel - plantroom 2 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
252,044 kWh
Electricity price (without CCL)
13.53 p/kWh
Annual gas consumption
334,871 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:
Carbon Footprint
203,143 kg CO₂ pa
250,000
(a)
200,000
CO₂ (CHP)
170,517 kg CO₂ pa
150,000
Net reduction
(b) 32,626 kg CO₂ pa
kg CO2/year
CO₂ (conv)
100,000 50,000 -
Conventional Gas (CHP)
Gas (boiler)
LoadTracker Grid electricity
By introducing a CHP, a reduction of 32.6 tonnes of CO₂ emissions (32,626/203,143 = 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) =(252,044 kWh x 0.519) + (334,871 kWh x 0.216) = 203,143 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) =(399,827 kWh x 0.216) + (61,956 kWh x 0.216) + (252,044 kWh x 0.519) - (115,681 kWh x 0.519) = 170,517 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
£51,227
CHP £18,450 (d) £3,168 (f) £20,447 (g) £42,065
60,000 50,000 40,000 30,000 20,000 10,000 £/year
Conv. £34,102 (c) £17,125 (e)
0
Conventional Gas (CHP)
LoadTracker
Gas (boiler)
Grid electricity
The use of LoadTracker CHP would result in annual savings of £51,227 - £42,065 = £9,161 pa relative to a conventional mains supply/boiler system. Notes: (c) = 252,044 kWh x 0.1353 £/kWh = £34,102 (d) = Assessed by LoadTracker programme (e) = 334,871 kWh x 0.05114 £/kWh = £17,125 (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. 25,000
20,000
kWh/month
15,000
10,000
5,000
‐ Jan
Feb
Mar
Apr
May
Site electricity demand
Jun
Jul
Aug
Sep
Oct
Nov
Dec
LoadTracker electricity production
CHP accounts for 115,681 kWh / 252,044 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:
45,000 40,000 35,000 30,000 25,000 kWh/month
20,000 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
284,640 kWh (h) 231,978 kWh (i) 52,662 kWh (j) 61,956 kWh (k)
Heat Balance Boiler 52,662 19%
CHP 231,978 81%
It can be seen that CHP account for 231,978 kWh/284,640 kWh = 81% of heat requirements of the user Notes: (h) = 334,871 kWh @ 85% (assumed boiler efficiency) = 284,640 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 = 52,662/0.85
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‐13 Apr‐13 May‐13 Jun‐13 Jul‐13 Aug‐13 Sep‐13 Oct‐13 Nov‐13 Dec‐13 Jan‐14 Feb‐14
34,320 42,326 32,648 17,310 14,749 15,953 19,759 19,313 33,165 25,872 47,589 31,867 334,871