|
|
|
Sort Order |
|
|
|
Items / Page
|
|
|
|
|
|
|
| Srl | Item |
| 1 |
ID:
110365
|
|
|
|
|
| Publication |
2011.
|
| Summary/Abstract |
We discuss two main job creation statistics often used by solar advocates to support increased solar deployment. Whilst overall solar technologies have a tendency to be labor-intensive, we find that the jobs per gigawatt hour statistic is relatively mis-leading as it has a tendency to reward technologies that have a low capacity factor. Ultimately the lower the capacity factor the more amplified the solar job creation number.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2 |
ID:
150069
|
|
|
|
|
| Summary/Abstract |
We investigate lower than expected capacity factors of Combined Heat and Power plants using a publicly available dataset of hourly performance for plants in the state of New York. Low utilization of a CHP indicates underperformance. We examine possible causes of this underperformance including economic arbitrage, poor maintenance and operational practices, oversizing of plants, and reliability and resiliency needs. Based on seasonal and weekday/weekend capacity factor averages, we find that there is not enough evidence to support the economic arbitrage cause. Out of 99 plants in the dataset, 64 plants have average capacity factor below 60%, indicating they are either oversized and/or poorly maintained. This suggests that the current practice of one-time fixed incentive ($/kW) favors investment in capacity with no incentive for utilization (unlike a production credit which incentivizes generation $/kW h). From a policy perspective, this paper recommends better pre-engineering assessment for correct sizing, as well as revision of incentives based on performance. Additional information should be collected so that a more accurate ongoing analysis of the societal benefits of CHP projects can be made. Lastly, the energy efficiency gap may be smaller than is commonly assumed and other options should be explored to meet energy efficiency goals.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3 |
ID:
180161
|
|
|
|
|
| Summary/Abstract |
Increasing use of renewable energy requires sufficient grid flexibility to address uncertainty and variability in electricity generation. Previous studies suggest that combined heat and power (CHP) systems may support grid flexibility but they do not consider operating hours. In this paper, we used CHP operating data and determined annual and monthly availability of the installed CHP capacity from various sectors (e.g., utility, independent power producer, commercial, and industrial) in all seven U.S. independent system operators (ISOs) and regional transmission organizations (RTOs). Also, we estimated hourly CHP availability installed in five facility types (i.e., hospitals, universities, hotels, offices, and manufacturing) in the state of New York. The results show that regardless of ISO/RTO, sector, or season, more than 40% of the installed CHP capacity (0.7–8.7 GW) was not fully utilized in 2019; the results are similar for 2018. This available CHP capacity accounted for up to 9% of the ISO/RTO's peak electric demand, which may yield cost savings up to $16 billion by avoiding installation costs of new natural gas combustion or combined-cycle turbines. To exploit the available CHP capacity to enhance grid flexibility, we recommend different policy implications including flexible contract lengths between CHP owners and grid operators, improved market designs, and simplified interconnection standards.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|