Mansfield Halls - Case sTUdY
Low Carbon Energy Solutions for Building Services
loadTracker combined heat and power (CHP) The Project
The Challenge
Mansfield Halls near Reading provides accommodation for students at Reading University. For the purposes of the project the site is divided into Blocks A-F with a total of 457 bedrooms and Block G with 147 bedrooms and 14 studios.
To provide a system for domestic hot water that would reduce energy consumption and CO2 emissions in support of the University’s sustainability strategy. The system also needed to deliver a high level of flexibility in order to respond to highly variable demands for hot water.
summary of site demand
The solution
Annual electricity demand Electricity price (excluding CCL) Gas consumption Gas price (excluding CCL)
2,145,204 kWh 11.46 p/kWh 575,293 kWh 3.10 p/kWh
features • Modular design for flexibility of installation • Automatic modulation of electrical output to minimise use of expensive grid electricity • Low noise levels (49dB), equivalent to a quiet office • Long service intervals (8,000 hours or 2 years)
Benefits • Onsite power generation with reduced consumption of grid electricity • Central plant room DHW production with minimal use of backup boilers • Significant reduction in carbon footprint • Major cost savings
Supplied and installed 3 x LoadTracker CHP with 15kWe/30kWth capacity each (two units for Blocks A-F, one for Block G) and 3 x 1,000 litre heat storage vessels.
Mansfield Halls - CASE STUDY
www.sav-systems.com
Cost and Carbon Savings Around 105 tonnes of CO2 emissions are reduced per annum by using a CHP system instead of a conventional mains supply/gas boiler system. This will also result in financial savings of nearly £29,000 per annum, compared to a mains supply/gas boiler system.
Operation in December 2011
CHP 1
CHP 2
CHP 3
Total
659
722
734
2,115
Electricity production [kWh]
10,034
11,035
11,231
32,300
Heat production [kWh]
19,439
21,361
21,736
62,536
Operating hours
Cost savings
£745
£820
£834
£2,399
CO2 reduction [kg]
2,723
2,996
3,049
8,768
Flexibility of Modular Approach Modular LoadTracker CHP uses a number of smaller units to provide greater flexibility than a single, higher capacity unit – the same principle as modular boilers. The units are controlled to deliver maximum efficiencies while minimising the number of units that are operating at any one time.
For further information contact: SAV Systems, Scandia House, Boundary Road, Woking, Surrey GU21 5BX Tel: +44 (0)1483 771910 Web: www.sav-systems.com E-mail: info@sav-systems.com