73 Examples of Control Operation

This section compares the performance of threshold control versus optimal control for three different buildings in different rate regions. In all cases, an hourly microturbine (MT) simulation was performed for an entire year. The MT systems had installed costs of $1000 per kW and an expected system lifetime of 10 years. The turbines were further assumed to be generic 50 kW generators operating with heat recovery where any available heat was used to supplement the space heating load if one existed each hour. A nominal heating efficency of 80% was assumed for the conventional space heating equipment in each building. Operation and maintenance costs were taken as $4.75 per installed kW per year plus an additional $0.007 per kWh produced. The discount, inflation, and tax rates were taken as 7, 2.4, and 33%, respectively. The cost of energy was assumed to be decreasing at the rate of 1.5% per year for electricity and 0.6% per year for natural gas. No buyback or other utility incentives were included in the analysis. The values assumed for all variables are conservative.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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