Some of our projects
Case Studies
Genesis Housing
A large 475 apartment site with the following challenges to address:
Challenges:
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High energy use
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Lack of visibility and control
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Ventilation needed redesigning and upgrading
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new metering, electricity, heat energy & water for all tenants
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High reactive works and constant faults
Operational benefits after works
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Being able to monitor and control the site to pinpoint alarms and site failures. Achieve steady running and increase plant life expectancy/reducing breakdowns by avoiding irregular running cycles, therefore reducing call outs/breakdowns and receiving alerts on a RAG alert methodology.
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The client was able to visualise the site and any alarms and issues entirely remotely, email alarms were sent on activation and reporting dashboards became achievable – a highly useful tool for the disposal of GHA.
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Having the ability to retrieve meter readings and bill the approx 1800 tenants per annum over 475 apartments generating a billing income of 875k per annum.
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Steady state and modulating control of the plant room using the CHP units achieved a 98% reduction in reactive works/callouts to the plant room.
Cost benefits
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At least a 30% saving per annum on plant energy usage with the chp dynamically satisfying base loads and boilers acting as backup to the chp units. A saving equating to 100k per annum.
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A reduction in reactive O&M call outs of up to £20,000 pa.
Genesis Block level metering
Challenge
GHA had approached Enerza to provide a solution to monitor energy usage on a block-level scale on 12 residential site’s which house thousands of tenants in the UK, the reason for this works to be undertaken was to provide NHG a clear picture of :
1.Energy Usage
2.Flow rates
3.Flow/return temperature’s
4.Temperature difference, instantaneous reads
5.District heat network performance
Using the data collected an in-depth analysis must be possible on the performance of plant room equipment / HIU performance and in troubleshooting potential and current problems with the heat network. This valuable data is then extracted from the multiple sites and is sent to NHG and Enerza where analytical software is used to provide clear information on energy usage/trends across chosen timescales.
Operational benefits
Some of the benefits of now being able to monitor Block Level energy parameters has been to pinpoint issue’s with the heat network such as :
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High Flow/return temperatures
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Equipment over use / unnecessary use
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Tracking excessive energy usage and implement resolution’s
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Reduce reactive maintenance / promote a more proactive maintenance schedule
Action’s to implement the correct resolution and achieve substantial energy cost saving’s for GHA can be achieved more efficiently. An increase in plant life expectancy / reducing breakdowns by avoiding irregular running cycles can be achieved.
Cost benefits
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An estimated 20% saving per annum on plant energy usage with the CHP units dynamically satisfying base loads and boilers acting as backup to the chp units. A saving equating to 100k per annum.
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An estimated reduction in reactive O&M call outs of up to £30,000 pa.
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ROI 3 years
H&F BC Updating of Equipment
Challenge Rectified
Enerza were approached by H&F BC to address some emergency works to care provisions throughout the borough.
There were a number of sites needing urgent works to keep them running reliably. The main issues were that the old boilers and associated equipment needed to be removed and replaced with new equipment.
The sites are quite old and there were a number of hazards which included asbestos risks that we needed to keep in mind.
Operational benefits
The developments are now running smoothly and reliably. This allows future upgrades for systems such as Optimum, which brings full control and visibilty for H&F.
There is plenty more to do going forward to enhance the development and in turn, save H&F running and operational costs.
Cost benefits
H&F have estimated to have saved ~35k + pa in regards to reduced site visits, less energy use and staff times dealing with complaints.
Metering and Heating
Challenge Rectified
The existing system was very old but functional. First priority was a health and safety audit/inspection to evaluate risks including access and any potential asbestos hazard.
Due to the stages being in constant use, a very close working relationship needed to be formed with the client in order to prevent costly delays and inconvenience to Pinewood.
The system to be implemented needed to follow the existing metering strategy which Pinewood already had in place which was pulse outputs to an existing radio network.
A significant amount of pipework modification/fabrication was needed to deliver the solution.
The AHU units were very old and were installed with multiple 6 & 8 branch manifolds which meant having to drain the network and cut back the manifolds to allow the correct distancing before the ultrasonic heat meters , this required extensive welding and fabrication works.
Operational benefits
Since the solution was delivered Pinewood Studios has been able to accurately bill their studio tenants for the heat energy usage. Also, due to the functionality of the Kamstrup 602 meters, temperatures and flow rates can now be monitored to diagnose any potential district heating system issues.
Cost benefits
Substantial income recovered and overheads recovery through precise billing.
Firstport
Challenges Rectified
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There was a range of issues including:
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Defective HIU units
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Metering/network issues
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Site handover protocols which required consultancy
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Plantroom equipment and control anomalies
Operational benefits
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HIU units on the first site have now been problem free for over 6 months.
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Tenant complaints have significantly reduced.
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The distribution issues have largely been resolved and tenants are now receiving heat through the district heat system.
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Control anomalies have been largely resolved.
Cost benefits
Now that the metering network is performing as expected, tenants are being billed accurately and on time. Consequently, First Port is able to collect expected energy revenues.
ASHP and Smart taps
Upon being awarded the tender for Bedford College, we set a plan to install and deliver 120 smart taps throughout all campuses (4) and convert the main tower block to communal HWS services.
From the initial survey, we devised a project plan to deliver the works which included:
– Scheduling times where low use of the campus could be used for Shutdowns to allow isolation and minimize disruption.
– Ensuring H&S was complied with and up-to-date, allowing for flexibility to align with campus usage.
– Weekly synchronized meetings to ensure all was running to plan and on track, plus implementing changes accordingly.
There were some challenges with hidden pipework and obscure electrical supplies. However, by working closely with the client and planning proactively, we were able to easily overcome these obstacles.
The air source HWS solution we delivered consisted of 2 x 9.6 kw units to feed the main tower block. In order to minimize disruption, this was done during the term break.
The primary benefits of using smart taps are;
– Smart taps significantly reduce the spread of bacteria in the wash space.
– The controlled water flow means taps cannot accidentally be left on.
– Generate huge water savings, especially when compared to traditional operating taps.
Estimated saving on the water by fitting the smart taps were 52.5 litres per tap x 126 = 6619 litres a day total.
We signed off the project with a very happy client and g
