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special report transmission


the relevant data to get useful information. This tool can also be used to design a new facility from the ground up for minimum TCO. It provides a comprehensive


but there is a bigger benefit to sharing a common liquid cooling system across multiple transmitters. In some cases, it may even be possible to share the building’s liquid to air heat exchanger, thereby eliminating the need for separate liquid to air heat exchangers. This would be particularly attractive for transmission facilities atop high buildings.


Harris TCO analysis tool


Harris has been working with several customers, including visits to customer facilities, to develop a comprehensive tool to evaluate and capture all the items that impact the TCO of a specific facility. An analysis tool is under development to make it easier to survey a facility and input all


Figure 3: liquid cooled UHF PA module.


inventory of all identifiable and quantifiable costs associated with operating a facility. All of the baseline data related to the location based energy costs, HVAC, floor space, maintenance, and other costs are first entered into the tool. Comparisons can be made for the TCO of various transmitter types. The energy consumption and


cooling requirements for many different models of Harris transmitters are built into the tool for direct calculation of the total cost of ownership over various time frames. Inputs to the analysis include:


• Transmitter and operating mode (picks up all operating parameters). • Transmitter acquisition, installation, and commissioning costs. • Facility location and energy cost per kW-Hr. • Heat to closed loop indoor environment or vented to outdoor environment. • HVAC acquisition and installation costs. • HVAC maintenance and replacement costs.


• HVAC operating costs based on SEER rating, climate, ducting, etc. • Liquid cooling system acquisition and installation costs. • Liquid cooling system operating costs. • Annual maintenance costs. • Annual facility rent based on volume occupied. • Training costs. Outputs from the analysis include:


• First year TCO including acquisition cost and training cost. • Annual ongoing TCO. • 5, 10, 15, and 20 year cumulative TCO. • Total heat output (BTU/HR), indoors and/or outdoors. • Cooling required (tons). • Cooling energy consumption and annual cost. • Total annual energy consumption (kW-Hr), annual carbon emissions. • Footprint, volume occupied, and rental costs. The Harris TCO tool also includes a


comparison tool, which will allow comparison of various models of Harris transmitters to each other and to competitive transmitters. The payback period to overcome the differential capital expenditure with the reduced operational expenditure is also calculated.


76 l ibe l september/october 2012 l www.ibeweb.com


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