A building with a peak load of 2,000 tons and equivalent full load hours of 2,500 hr/year, determine the most economical option to deliver cooling needs between the two design alternatives.

Use LCC analysis with a life cycle of 20 years and a discount rate of 5%. Determine the impact of the chiller cost as well as the cost for the chiller water. Specifically, consider two costs for the chiller—$2000/ton and $3000/ton—in addition to $2500/ton. Moreover, vary the rate of the chilled water from $0.08/ton-hr to $0.14/ton-hr.

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A conventional cooling plant with an electric chiller (sized to be 2,000 tons) with an efficiency of 0.70 kW/ton. The cost of the cooling plant is estimated to be $2,000/ton with an annual operation and maintenance costs of $90,000/year. Electricity rate includes an energy charge of $0.10/kWh and a monthly demand charge of $25/kW. The peak demand of 2,000 tons occurs every month of the year. A district cooling provider with a pipe connection 50 m in length. The cost of the connection, including the piping, is estimated to be $3,000/m. The rate for the chilled water is $0.12/ton-hr with a capacity charge of $300/ton. The operation and maintenance costs are included in the provider's rate.