Preliminary Sea-Chest Sizing from Grating Intake Velocity and Cooling Requirement
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract Sea-chest sizing is a process that is often based on rules of thumb rather than a set scientific method. This paper aims to create such a method by incorporating real world data and sound engineering principles. Specifically, the use of example species to set a flow velocity that will avoid impingement on fish, comparing engine indicated power to obtain an early estimate for flow rate, and ratio of open area to grating area to size the sea-chest. The main use case of this method is for future Marine Mechanical Design students to size sea-chests on their third-year project vessels. INTRODUCTION A large part of the Marine Mechanical Design program at the Marine Institute of Memorial University of Newfoundland is creating the third-year design project. This involves taking a previous year’s Naval Architecture third-year project vessel and designing the auxiliary systems for that ship. The sea main and sea chest of the project vessel used in this paper can be seen in figure 1. The students are given structural drawings and minimal information and tasked with making decisions that will turn the bare hull into a working ship. This paper aims to create a preliminary method to size sea-chests for the use of future Marine Mechanical Design students in the creation of their third-year projects. To do this, three key pieces of information are required. The flow velocity through the grating, the flowrate, and the grating open area. FLOW VELOCITY THROUGH GRATING A review of current regulations found very little in the way of hard and fast rules about the flow velocity of sea chests. The United States Code of Federal Regulations states: "…each cooling water intake structure at your facility to a maximum through-screen design intake velocity of 0.5 ft/s;". (United States Code of Federal Regulations, 2013, Title 40 Chapter I Subchapter D Part 125.84), however, this regulation is intended for application to cooling water intake structures of civil installations in freshwater bodies rather than for a vessel. Given the limited availability of guidance of velocity through the grating, a suitable metric needed to be determined.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it