Energy savings with a Grundfos energy check at Mayo General Hospital, Castlebar, Ireland

Mayo General Hospital

Mayo General Hospital’s new pump solution improved system redundancy and control – and delivered far better energy savings than predicted.

Mayo General Hospital in Castlebar, Ireland provides County Mayo with medical services such as general surgery and paediatrics. The hospital is committed to Ireland’s second National Energy Efficiency Action Plan (NEEAP), the goal of which is to achieve a 33% reduction in public sector energy use by 2020. Aiming to achieve pump energy savings, redundancy and improved control, hospital management turned to Grundfos for advice.

Total redundancy and control

“We were looking for a pump solution offering control and full redundancy, as well as energy savings,” says HSE Corporate Estates Manager Brendan Redington. In 2013, following agreement with Brendan Redington and local Maintenance Manager Martin McGoff, Grundfos Ireland’s Energy Sales Engineer Liam Kavanagh performed an Energy Check of the hospital’s hot water circulator pumps. The results predicted annual energy savings of approximately 38,600 kWh (55%) by replacing the old circulators with new, high efficiency models. On-site engineering consultants, Kyne & Clyne, chose Grundfos twin-head MAGNA3 circulators and placed an order.


New installation exceeds expectations

The Grundfos MAGNA3 has a number of unique features including the AUTOADAPT control mode, an integrated heat energy meter, BMS communication capabilities and class leading hydraulic and motor efficiencies. At Mayo General, the new pump installation quickly exceeded expectations: Evidence based data that was compiled during the commissioning of the pumps via the interactive control panel indicated that instead of the 55% energy savings predicted by the Energy Check report, savings had actually reached an impressive 80%! On top of that, the new pumps increase reliability in an area where failure is not an option: “Another important improvement is that pump resilience has been improved by switching from single head to twin head units at our critical care locations,” concludes Brendan Redington.

The hard facts

Application: Heating circulators
Grundfos products installed: 25 MAGNA3 D (twin-head pumps)
Calculated annual energy savings: 38,600 kWh (55%)
Actual annual savings (@ current consumption): 54,500 kWh (80%)
Current annual savings: EUR 6,548
CO2 savings: 39 tonnes/year

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