neqsim-fired-heater-duty-screening

neqsim-fired-heater-duty-screening is a skill for Claude Code, Codex from equinor/neqsim-community-skills. It costs 66 tokens per session (1,185 once invoked), scanned A, original, Apache-2.0.

A screening aid for estimating a fired heater’s process duty, fuel use, and average radiant heat flux. A fired heater uses fuel combustion to heat a process stream, while radiant flux is heat received per unit tube area.

In plain words
What is it for?
Use it to estimate process and fired duty, fuel-gas rate, and average radiant flux from flow, temperatures, efficiency, fuel value, and tube area.
Why use it?
It provides an early energy and heat-flux check before detailed heater design. It can indicate whether the estimated radiant-section loading exceeds a chosen guideline.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to estimate process and fired duty, fuel-gas rate, and average radiant flux from flow, temperatures, efficiency, fuel value, and tube area.

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Install with agentmods
npx agentmods add skills/equinor/neqsim-community-skills/fired-heater-duty-screening
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add equinor/neqsim-community-skills --skill fired-heater-duty-screening
Clone the repo
git clone --depth 1 https://github.com/equinor/neqsim-community-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for neqsim-fired-heater-duty-screening

README.md
[![agentmods](https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/fired-heater-duty-screening/github.svg)](https://agentmods.dev/skills/equinor/neqsim-community-skills/fired-heater-duty-screening)
Your own site
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/fired-heater-duty-screening"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/fired-heater-duty-screening/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for neqsim-fired-heater-duty-screening

Your own site · 80×15
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/fired-heater-duty-screening"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/fired-heater-duty-screening.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,185 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00066 $0.01185
Opus 5 $0.00033 $0.00593
Sonnet 5 $0.00013 $0.00237
Haiku 4.5 $0.00007 $0.00119

Measured 12d ago against content hash 21152a2b9a42, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

neqsim-fired-heater-duty-screening scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (examples/basic_fired_heater_duty_screening.py, src/fired_heater_duty_screening/__init__.py, src/fired_heater_duty_screening/model.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/process/fired-heater-duty-screening/SKILL.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fired Heater Duty Screening

Use this skill for public, educational fired-heater screening. It estimates the process duty, the fired duty, the fuel-gas rate, and the average radiant-section heat flux using open energy-balance relations so an agent can scope a fired-heater study and check the radiant flux against a public guideline before detailed thermal design.

When to Use

  • When a user asks roughly what fired duty and fuel rate a heater needs.
  • When an agent needs a quick radiant-flux check to scope a fired-heater study.
  • When examples must run without confidential heater designs, vendor data, or company specs.

Inputs

  • mass_flow: process mass flow in kg/s.
  • specific_heat: process-fluid specific heat in kJ/(kg K).
  • inlet_temperature: process inlet temperature in kelvin.
  • outlet_temperature: process outlet temperature in kelvin.
  • thermal_efficiency: heater thermal efficiency, default 0.85.
  • fuel_heating_value: fuel lower heating value in MJ/kg, default 46.0.
  • radiant_area: radiant-section tube surface area in m2.
  • allowable_radiant_flux: allowable average radiant flux in kW/m2, default 37.0.

Outputs

  • process_duty_kw: process absorbed duty Q.
  • fired_duty_kw: fired duty from the efficiency.
  • fuel_rate_kg_s: fuel-gas mass rate.
  • average_radiant_flux_kw_m2: process duty divided by radiant area.
  • flux_ratio: ratio of average radiant flux to the allowable flux.
  • fired_heater_warning: ok, watch, or high-flux.
  • assumptions: public assumptions used by the placeholder model.

Engineering Method

The Python class FiredHeaterDutyModel uses open energy-balance relations only:

  • the process duty uses Q = mass_flow * specific_heat * (T_out - T_in).
  • the fired duty uses Q_fired = Q / thermal_efficiency.
  • the fuel rate uses fuel = Q_fired / fuel_heating_value.
  • the average radiant flux uses Q / radiant_area and is compared to a public guideline.

This is educational and screening-only logic. It uses a constant specific heat, treats all process duty as absorbed in the radiant section for the flux estimate, and does not model convection-section split, tube-wall temperature, flame and bridgewall temperature, draft, or emissions. Typical public average radiant fluxes are about 30 to 37 kW/m2. It is not a replacement for validated fired-heater design (for example API 560) and a qualified review.

Read the full file on GitHub · 111 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 111 lines · 66 tokens per session scan A 21152a2b9a42

Subscribe to this mod's changes

neqsim-fired-heater-duty-screening is a skill published in the GitHub repository equinor/neqsim-community-skills (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 66 tokens to every session and 1,185 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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