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Investment Grade Energy Efficiency Audits - Energy Saving Examples

Green Consultancy Energy Efficiency Audits result in energy consumption reductions of up to 80% within specific processes and such savings may be achievable without major capital investment.  Here are some typical examples.

Chilled Water Plant - Aquarium

Use of an energy analyser to profile the electricity consumption of a packaged water chiller at an aquarium identified the opportunity to modify the operating regime at no cost, reducing consumption by over 1,000kWh per day, and saving over £30,000pa.

Compressed Air – Print & Manufacturing

Detailed analysis of an air compressor at a print works identified the opportunity to reduce electricity consumption through a relatively small adjustment of pressure settings, saving over £4,000/year at no cost. 

At a manufacturing site, savings of over £8,000/year were identified though a no-cost modification to the compressor operating regime.  This was nearly 8% of the site’s electricity costs.

Industrial Processes - Electronics Manufacturing

Improved control of process extract using interlocks and inverter drives at an electronics manufacturer was one factor that assisted in reducing their electricity consumption by over 1,000,000-kWh per annum or 22%. 

Many industrial processes are grossly inefficient and can provide the opportunity for significant savings.  An improvement in efficiency from 5% to 10% halves the energy consumption, and may be achievable relatively easily.

Refrigeration - Retail

At a retail outlet, an adjustment of display case temperatures reduced refrigeration electricity consumption by approximately 50%, and also resulted in an improvement in the quality of the product.

Space and Water Heating – FE College and University

Decentralisation of space and water heating at a College of Further Education allowed modification to the operating regime for the heating system that reduced fossil fuel consumption by 50%. 

At a university, similar measures produced savings of over 40%.

Steam Systems and Boiler Plant - Industrial

Detailed analysis of the operation of boiler plant on a textile manufacturing site revealed the unnecessary operation of steam heating during the weekends, at a cost of over £1,000 per day. 

On another industrial site, adjustment of the boiler controls resulted in a 29% reduction in operation at no cost. 

On another industrial site analysis revealed the opportunity for cost-effective replacement of the existing boilers with two new ones with one third of the capacity.  This resulted in a 40% reduction in gas consumption and also freed up valuable space in the plant room.

Ventilation and Air Conditioning - Hospital

A new hospital was suffering from excessive energy consumption.  A detailed investigation of the BMS and ventilation plant identified that the LPHW valve to a frost battery was being held open continuously.  Remedial works cost nothing, and saved over £12,000/year in reduced LPHW and chilled water demands.

Water Heating - General

Water is commonly heated with incredibly low efficiencies; figures of less than 5% have been established through detailed analysis.  This often provides the opportunity for spectacular savings.

At an educational establishment, the decentralisation of water heating reduced fossil fuel costs from £3,000 to £300 during the summer months, with additional but smaller savings accruing during the heating season.