-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy paththermal-logic.html
More file actions
606 lines (565 loc) · 23.8 KB
/
thermal-logic.html
File metadata and controls
606 lines (565 loc) · 23.8 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>THERMAL LOGIC.</title>
<meta name="description" content="A document on electric heat, compute, and the SAUNA. thermal module.">
<meta name="robots" content="noindex, nofollow">
<link rel="canonical" href="https://lyn.page/thermal-logic">
<!-- open graph -->
<meta property="og:title" content="THERMAL LOGIC.">
<meta property="og:description" content="A document on electric heat, compute, and the SAUNA. thermal module.">
<meta property="og:image" content="https://lyn.page/images/og-sauna.jpg">
<meta property="og:url" content="https://lyn.page/thermal-logic">
<meta property="og:type" content="article">
<meta property="og:site_name" content="LYN">
<!-- twitter -->
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="THERMAL LOGIC.">
<meta name="twitter:description" content="A document on electric heat, compute, and the SAUNA. thermal module.">
<meta name="twitter:image" content="https://lyn.page/images/og-sauna.jpg">
<link rel="icon" href="/favicon.ico">
<link rel="apple-touch-icon" href="/apple-touch-icon.png">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400&family=IBM+Plex+Sans:wght@300;400&family=Inter:wght@600&display=swap" rel="stylesheet">
<style>
:root {
--bg: #fafafa;
--text: #1a1a1a;
--text-muted: #a0a0a0;
--ghost: #efefef;
--border: #e0e0e0;
}
[data-theme="dark"] {
--bg: #222222;
--text: #e0e0e0;
--text-muted: #777777;
--ghost: #2f2f2f;
--border: #333333;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
font-family: 'IBM Plex Sans', -apple-system, sans-serif;
font-weight: 300;
font-size: 16px;
line-height: 1.6;
background: var(--bg);
color: var(--text);
transition: background 0.3s, color 0.3s;
-webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.6; }
/* ---- cover ---- */
.cover {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
min-height: 100vh;
padding: 120px 40px 80px;
text-align: center;
position: relative;
}
.cover-headline {
font-family: 'IBM Plex Sans', sans-serif;
font-weight: 300;
font-size: 1.3rem;
letter-spacing: -0.01em;
margin-bottom: 8px;
}
.cover-sub {
font-size: 0.8125rem;
color: var(--text-muted);
margin-bottom: 48px;
}
.cover-image {
max-width: 560px;
width: 100%;
}
.cover-image img {
width: 100%;
height: auto;
opacity: 0;
transition: opacity 1.2s ease-in-out;
}
.cover-image img.loaded { opacity: 1; }
.cover-links {
margin-top: 40px;
font-size: 0.8125rem;
}
.cover-links a { color: var(--text-muted); }
.cover-links .link {
color: var(--text);
text-decoration: underline;
text-underline-offset: 3px;
}
.scroll-hint {
position: absolute;
bottom: 48px;
left: 50%;
transform: translateX(-50%);
font-family: 'IBM Plex Mono', monospace;
font-size: 0.625rem;
color: var(--text);
letter-spacing: 0.05em;
opacity: 1;
transition: opacity 0.6s;
}
@media (max-height: 700px) { .scroll-hint { display: none; } }
/* ---- sections ---- */
.page-section {
max-width: 800px;
margin: 0 auto;
padding: 120px 40px;
}
.section-number {
font-family: 'IBM Plex Mono', monospace;
font-weight: 400;
font-size: 0.6875rem;
color: var(--text-muted);
letter-spacing: 0.04em;
margin-bottom: 24px;
}
.section-heading {
font-family: 'IBM Plex Sans', sans-serif;
font-weight: 300;
font-size: 1.4rem;
letter-spacing: -0.01em;
margin-bottom: 8px;
}
.section-text {
font-size: 0.875rem;
line-height: 1.65;
max-width: 580px;
}
.section-text + .section-text { margin-top: 16px; }
.muted { color: var(--text-muted); }
.link {
text-decoration: underline;
text-underline-offset: 3px;
}
.link:hover { opacity: 0.6; }
/* ---- data table ---- */
.data-table {
width: 100%;
max-width: 580px;
border-collapse: collapse;
margin-top: 24px;
margin-bottom: 16px;
}
.data-table td {
font-family: 'IBM Plex Sans', sans-serif;
font-weight: 300;
font-size: 0.8125rem;
padding: 8px 0;
border-bottom: 1px solid var(--border);
vertical-align: top;
}
.data-table td:first-child {
color: var(--text-muted);
width: 40%;
padding-right: 16px;
}
.data-table tr:last-child td {
border-bottom: none;
}
/* ---- image break ---- */
.image-break {
width: 100%;
padding: 0;
}
.image-break img {
width: 100%;
height: auto;
display: block;
opacity: 0;
transition: opacity 1.2s ease-in-out;
}
.image-break img.loaded { opacity: 1; }
/* ---- dark mode: invert line drawings ---- */
[data-theme="dark"] img.invert-dark { filter: invert(1); }
/* ---- steps ---- */
.step {
display: flex;
gap: 24px;
margin-bottom: 20px;
align-items: baseline;
}
.step-label {
font-family: 'IBM Plex Mono', monospace;
font-size: 0.6875rem;
color: var(--text-muted);
min-width: 120px;
flex-shrink: 0;
}
.step-text {
font-size: 0.875rem;
line-height: 1.65;
max-width: 480px;
}
/* ---- footer ---- */
.site-footer {
max-width: 800px;
margin: 0 auto;
padding: 60px 40px 120px;
border-top: 1px solid var(--border);
}
.footer-note {
font-family: 'IBM Plex Mono', monospace;
font-size: 0.625rem;
color: var(--text-muted);
letter-spacing: 0.04em;
margin-top: 48px;
}
/* ---- reveal ---- */
.reveal {
opacity: 0;
transform: translateY(24px);
transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
opacity: 1;
transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
.reveal { opacity: 1; transform: none; transition: none; }
}
/* ---- site nav ---- */
.site-nav {
position: fixed;
top: 0; left: 0; right: 0;
height: 60px;
display: flex;
align-items: center;
padding: 0 max(24px, env(safe-area-inset-left));
background: var(--bg);
z-index: 10;
}
.nav-logo {
font-family: 'Inter', sans-serif;
font-weight: 600;
font-size: 1.125rem;
letter-spacing: -0.02em;
color: var(--text);
text-decoration: none;
flex-shrink: 0;
transition: color 0.2s;
cursor: pointer;
line-height: 1;
}
.nav-items.open { opacity: 1; visibility: visible; }
.nav-items {
position: absolute;
left: 50%;
transform: translateX(-50%);
display: flex;
align-items: center;
gap: 20px;
opacity: 0;
visibility: hidden;
transition: opacity 0.25s ease, visibility 0.25s ease;
}
@media (hover: hover) {
.site-nav:hover .nav-items { opacity: 1; visibility: visible; }
}
.nav-items a, .nav-items button {
font-family: 'IBM Plex Mono', monospace;
font-weight: 400;
font-size: 0.6875rem;
letter-spacing: 0.04em;
color: var(--text);
text-decoration: none;
background: none;
border: none;
cursor: pointer;
padding: 0;
white-space: nowrap;
transition: opacity 0.15s;
}
.nav-items a:hover, .nav-items button:hover { opacity: 0.6; }
.nav-items .nav-muted { color: var(--text-muted); }
.nav-sep {
width: 1px;
height: 12px;
background: var(--text-muted);
opacity: 0.3;
flex-shrink: 0;
}
@media (max-width: 768px) {
.nav-items {
position: fixed;
top: 52px;
left: 20px;
margin-left: 0;
flex-direction: column;
align-items: flex-start;
gap: 6px;
background: var(--bg);
padding: 12px 16px;
min-width: 140px;
transform: translateY(-8px);
transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}
.nav-items.open {
opacity: 1;
visibility: visible;
transform: translateY(0);
}
.nav-sep { display: none; }
}
/* ---- responsive ---- */
@media (max-width: 900px) {
.cover { padding: 100px 24px 80px; }
.page-section { padding: 80px 24px; }
.step { flex-direction: column; gap: 4px; }
.step-label { min-width: auto; }
.site-footer { padding: 40px 24px 80px; }
}
/* ---- print ---- */
@media print {
.site-nav, .scroll-hint { display: none !important; }
.reveal { opacity: 1 !important; transform: none !important; }
img { opacity: 1 !important; }
}
</style>
<script>
(function() {
var saved = localStorage.getItem('lyn-theme');
var prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
var theme = saved || (prefersDark ? 'dark' : 'light');
document.documentElement.setAttribute('data-theme', theme);
})();
</script>
</head>
<body>
<nav class="site-nav" id="siteNav">
<div class="nav-logo" id="logo">LYN.</div>
<div class="nav-items" id="navItems">
<a href="index.html">home</a>
<a href="https://sauna.lyn.page">sauna</a>
<a href="documents.html">documents</a>
<span class="nav-sep"></span>
<button class="nav-muted" onclick="toggleTheme()" id="themeBtn"></button>
</div>
</nav>
<div class="cover" id="top">
<div class="cover-headline">THERMAL LOGIC.</div>
<div class="cover-sub">electric heat, compute, and sauna, spa, and pool applications.</div>
<div class="cover-image">
<img src="/images/indoor.jpg" width="1536" height="1024" alt="Indoor sauna installation">
</div>
<div class="cover-links">
<a href="#context" class="link">premise</a> <span class="muted">/</span>
<a href="#heat">thermodynamics</a> <span class="muted">/</span>
<a href="#application">m4 in the system</a> <span class="muted">/</span>
<a href="#constraints">when this works</a> <span class="muted">/</span>
<a href="#operations">operations</a> <span class="muted">/</span>
<a href="#usecase">sauna application</a>
</div>
<div class="scroll-hint" id="scrollHint">scroll</div>
</div>
<section class="page-section reveal" id="context">
<div class="section-number">01 — premise</div>
<h2 class="section-heading">Comparison at the same wattage</h2>
<p class="section-text">Any electric heating system converts electrical energy into heat.</p>
<p class="section-text">Where a site already needs that heat, the relevant comparison is between two devices at the same wattage: a conventional electric heater and a compute module.</p>
<p class="section-text">Both produce heat. One also produces a second output. The thermodynamics do not change. The site question is whether that second output should be included in the model.</p>
<table class="data-table">
<tr>
<td>premise</td>
<td>the site already needs electric heat</td>
</tr>
<tr>
<td>comparison</td>
<td>conventional heater versus compute module at the same wattage</td>
</tr>
<tr>
<td>constant</td>
<td>same electricity in, same heat out</td>
</tr>
<tr>
<td>variable</td>
<td>the second output produced while the unit runs</td>
</tr>
</table>
</section>
<section class="page-section reveal" id="heat">
<div class="section-number">02 — thermodynamics first</div>
<h2 class="section-heading">Electricity, heat, and compute</h2>
<p class="section-text">All electrical energy in is converted to heat energy out. This is physics, not an efficiency claim. Once that is understood, a different question appears: where is electric heat already required anyway?</p>
<p class="section-text">Anywhere electricity already converts to heat, mining replaces the heater at the same wattage. Same electricity in. Same heat out. The difference is what comes out the other side.</p>
<p class="section-text">Start with the heater that already exists. If the heat is already required for the building, the changing room, the cabin baseline, or the pool, the energy was already being spent. The second output is not a reason to consume more power. It is a consequence of replacing one electric heat source with another.</p>
<table class="data-table">
<tr>
<td>input</td>
<td>electricity at the same wattage as the heater being replaced</td>
</tr>
<tr>
<td>output 1</td>
<td>heat for the space</td>
</tr>
<tr>
<td>output 2</td>
<td>compute that can accumulate bitcoin while the unit runs</td>
</tr>
<tr>
<td>comparison</td>
<td>always against the conventional electric heater the site would otherwise use</td>
</tr>
</table>
</section>
<div class="image-break reveal">
<img src="/images/m4-thermal.png" alt="M4 thermal module" class="invert-dark">
</div>
<section class="page-section reveal" id="application">
<div class="section-number">03 — m4 in the system</div>
<h2 class="section-heading">Stove and thermal module</h2>
<p class="section-text">A sauna installation needs two kinds of heat. The sauna heater brings the cabin to operating temperature. The thermal module heats the space around it and can hold the cabin at a warm baseline so the heater covers only the delta to sauna temperature.</p>
<p class="section-text">In outdoor installations, that means heat for the changing room and a warm cabin baseline. In commercial buildings, it can provide heat for surrounding space. In pool settings, it can replace an electric pool heater one-to-one at the same wattage while the site accumulates bitcoin in its own wallet.</p>
<p class="section-text">M4 is optional. It does not replace the stove. It provides baseline heat where heat is already needed.</p>
<table class="data-table">
<tr>
<td>sauna heater</td>
<td>heats the cabin to operating temperature, typically 80-110 C</td>
</tr>
<tr>
<td>M4 thermal</td>
<td>heats the surrounding space and holds the cabin at a warm baseline</td>
</tr>
<tr>
<td>pool application</td>
<td>replaces an electric pool heater one-to-one at the same wattage</td>
</tr>
<tr>
<td>typical configuration</td>
<td>3,500 W power draw, 3,500 W thermal output, 84 kWh heat per day</td>
</tr>
<tr>
<td>custody</td>
<td>bitcoin mines to a wallet the operator controls</td>
</tr>
</table>
</section>
<section class="page-section reveal" id="constraints">
<div class="section-number">04 — when this works</div>
<h2 class="section-heading">Fit conditions</h2>
<p class="section-text">Not every site is a fit. Economics scale with two inputs: thermal demand and electricity price. Pools and continuously heated spaces run more hours. Seasonal private sites can still work, but the operating profile is different.</p>
<p class="section-text">A site should already need heat for enough hours that the second output can be included in the model. Continuous loads are the simplest case. Seasonal loads require a narrower assessment.</p>
<div style="margin-top: 32px;">
<div class="step">
<div class="step-label">thermal demand</div>
<div class="step-text">The heat must already be required: changing room, building, pool, or another continuous load.</div>
</div>
<div class="step">
<div class="step-label">electricity supply</div>
<div class="step-text">Lower-cost electricity improves the bitcoin side, but the correct baseline is always the conventional heater it replaces.</div>
</div>
<div class="step">
<div class="step-label">continuity</div>
<div class="step-text">Continuous loads such as pools and commercial spaces produce the highest utilisation.</div>
</div>
<div class="step">
<div class="step-label">variability</div>
<div class="step-text">Bitcoin output changes over time. The heat side does not. The thermodynamics stay fixed.</div>
</div>
</div>
</section>
<section class="page-section reveal" id="operations">
<div class="section-number">05 — operations and lifecycle</div>
<h2 class="section-heading">Operational model</h2>
<p class="section-text">The sauna lasts decades. The compute module runs on its own hardware cycle and can be swapped without changing the architecture of the broader installation.</p>
<p class="section-text">The operator controls the wallet. Custody stays with the site. The module should be treated as building infrastructure with defined monitoring and maintenance requirements.</p>
<table class="data-table">
<tr>
<td>hardware life</td>
<td>typically 4-5 years before a straightforward swap to newer hardware</td>
</tr>
<tr>
<td>custody</td>
<td>bitcoin mines to a wallet the operator controls</td>
</tr>
<tr>
<td>role</td>
<td>building infrastructure with heat as the primary function</td>
</tr>
</table>
</section>
<section class="page-section reveal" id="usecase">
<div class="section-number">06 — sauna application</div>
<h2 class="section-heading">Relation to the sauna business case</h2>
<p class="section-text">The sauna business case does not depend on bitcoin. Sessions, memberships, hospitality, and year-round use can support an installation on their own.</p>
<p class="section-text">M4 can add a second output where a site already needs electric heat. The heating function remains the same. The output profile changes.</p>
<p class="section-text">This page documents the thermal logic behind that option: what stays constant, what changes, and the conditions under which it applies.</p>
</section>
<footer class="site-footer">
<p class="section-text" style="font-weight: 400;">Julius Schulze-Berge</p>
<p class="section-text muted"><a href="mailto:julius@lyn.page" class="link">julius@lyn.page</a></p>
<div class="footer-note">thermal logic for sauna, spa, and pool applications</div>
</footer>
<script>
document.querySelectorAll('img').forEach(function(img) {
if (img.complete) { img.classList.add('loaded'); }
else { img.addEventListener('load', function() { img.classList.add('loaded'); }); }
});
var navItems = document.getElementById('navItems');
var navLogo = document.getElementById('logo');
var siteNav = document.getElementById('siteNav');
navLogo.addEventListener('click', function() {
navItems.classList.toggle('open');
});
document.addEventListener('click', function(e) {
if (siteNav.contains(e.target)) return;
navItems.classList.remove('open');
});
function updateThemeBtn() {
var current = document.documentElement.getAttribute('data-theme');
document.getElementById('themeBtn').textContent = current === 'dark' ? 'light mode' : 'dark mode';
}
function toggleTheme() {
var html = document.documentElement;
var current = html.getAttribute('data-theme');
var next = current === 'dark' ? 'light' : 'dark';
html.setAttribute('data-theme', next);
localStorage.setItem('lyn-theme', next);
updateThemeBtn();
}
updateThemeBtn();
if (window.location.hash) {
var initialTarget = document.querySelector(window.location.hash);
if (initialTarget) {
setTimeout(function() {
initialTarget.scrollIntoView({ behavior: 'auto' });
}, 80);
}
}
var scrollHint = document.getElementById('scrollHint');
window.addEventListener('scroll', function() {
if (window.scrollY > 60) { scrollHint.style.opacity = '0'; }
}, { passive: true });
var reveals = document.querySelectorAll('.reveal');
var observer = new IntersectionObserver(function(entries) {
entries.forEach(function(entry) {
if (entry.isIntersecting) {
entry.target.classList.add('visible');
observer.unobserve(entry.target);
}
});
}, { threshold: 0.15 });
reveals.forEach(function(section) { observer.observe(section); });
document.querySelectorAll('a[href^="#"]').forEach(function(link) {
link.addEventListener('click', function(e) {
var target = document.querySelector(this.getAttribute('href'));
if (target) {
e.preventDefault();
target.scrollIntoView({ behavior: 'smooth' });
navItems.classList.remove('open');
}
});
});
</script>
</body>
</html>