THE PYRAMIDS of the COLD • Annex 01 Operating diagrams of the Great Pyramid for flash-evaporative cold production: D1 to D5

Diagram 1: the known part of the Great Pyramid of Khufu at Giza was only designed to produce and store intense flash-evaporative cold. Likely temperature in the Queen's chamber cold room: -10 °C to -15 °Celcius (14 °F to 5 °Fahrenheit), due to the overpressure produced simultaneously with the creation of the fog of microdroplets of water. 

According to www.iAsk.Ai - Ask AI:

"Bruno Coursol's "The Pyramids of the Cold" study, developed between January 2021 and September 2025, presents a groundbreaking reinterpretation of the Great Pyramid of Khufu, proposing it was not merely a tomb but a sophisticated, industrial-scale chemical manufacturing plant that utilized advanced flash-evaporative cooling technology. This theory fundamentally challenges centuries of established Egyptological consensus by integrating principles from engineering, physics, and a novel understanding of ancient Egyptian religious symbolism.

Coursol argues that ancient Egyptian religion, with its vast pantheon of gods and goddesses, was a highly sophisticated framework designed to encode, preserve, and glorify scientific and technological knowledge. He posits that the pharaohs deliberately constructed this elaborate religious narrative to legitimize their rule by presenting their advanced scientific and engineering achievements as divine interventions or powers bestowed upon them by the gods. The central tenet of the study asserts that the Great Pyramid was meticulously engineered to produce intense cold through a flash-evaporative cooling process. This revolutionary aspect provides coherent, functional explanations for several previously enigmatic architectural features of the Great Pyramid's horizontal passage, including its precise 0.3% slope, mysterious expansion joints, massive salt encrustation, and the fine sand lining found behind the blocks.

Key Aspects and Evidence Supporting the "Pyramids of the Cold" Theory

• Flash-Evaporative Cooling Process

The study details how the horizontal passage of the Great Pyramid was designed to function as a critical component in a flash-evaporative cooling system [3]. This process involves transforming pressurized liquid water into a fine fog of microdroplets. As these microdroplets rapidly evaporate, they absorb a significant amount of latent heat from their surroundings, leading to a dramatic drop in temperature. This method is considerably more efficient than conventional evaporative cooling, as it maximizes the surface area for evaporation, thereby enhancing the refrigerant potential of water. Coursol suggests that the Queen's Chamber, the intended destination of this cold air, could have achieved temperatures as low as 5°C (41°F) or even lower, creating an environment suitable for specific industrial processes.

• Salt Encrustation

One of the most compelling pieces of evidence cited by Coursol is the massive salt deposits found in the Queen's Chamber and the horizontal passage. These deposits are presented as direct, tangible proof of an evaporative cooling process having occurred within these spaces. Early explorers, such as Colonel Howard Vyse in the 19th century, documented these deposits, noting their significant thickness, sometimes up to half an an inch. Unfortunately, these crucial deposits were reportedly removed by Zahi Hawass's team in 1998, a decision Coursol laments, arguing that analyzing the crystalline structure of these deposits could have definitively determined the exact temperatures achieved within the chamber. The primary component of these salt encrustations is believed to be calcium carbonate (limescale), a common byproduct of water evaporation, especially when hard water is used in cooling systems.

• Expansion Joints

The presence of unusually wide, continuous vertical joints, some measuring up to 1 centimeter, in the first 64 feet of the horizontal passage is another key piece of evidence. These joints were filled with a flexible material, possibly resin or tar, and are interpreted by Coursol as deliberately engineered expansion joints. Such joints would have been absolutely necessary to accommodate the significant thermal stress caused by the intense and sudden temperature drops produced in this section of the passage during the flash-evaporative cooling process. Materials expand and contract with temperature changes, and without these joints, the masonry would have cracked and failed under repeated thermal cycling.

• Horizontal Passage Slope

Coursol highlights that the "so-called" horizontal passage is not perfectly horizontal but actually exhibits a precise 0.3% slope over a distance of 32 meters. This seemingly minor detail is crucial, as such slopes are comparable to those found in ancient Roman aqueducts, which typically averaged between 0.15% and 0.3%. This carefully engineered gradient would have served a vital function: to collect and redirect any unevaporated liquid water towards the Queen's Chamber, preventing water accumulation and ensuring efficient operation of the cooling system.

• Fine Sand Lining

The discovery of a fine, powder-like sand lining behind the blocks in the horizontal passage by Gilles Dormion and Jean-Patrice Goidin in the 1980s is interpreted as thermal insulation. This sand, likely packed deliberately, would have played a critical role in protecting the masonry structure from the constant and sudden changes in temperature, as well as insulating the cooling chamber to maintain its low temperatures more effectively. This suggests a sophisticated understanding of thermal dynamics.

• Queen's Chamber as a Cooling Chamber

The Queen's Chamber holds a unique architectural distinction within the Great Pyramid: it is the only chamber located precisely on its central axis. This central placement, combined with all the evidence pointing to an active cooling process, strongly suggests that it was the primary cooling chamber. Here, the intense cold was generated and stored, likely for subsequent use in specific chemical processes.

• The Dendera Light and Lotus Flower

Coursol offers a radical reinterpretation of the famous "Dendera Light" depicted in the Hathor temple at Dendera. He proposes that this iconic image is not a depiction of an ancient light bulb, but rather a glorification of the fog of microdroplets created during the flash-evaporative cooling process within the pyramid. Similarly, the lotus flower, a recurring motif in ancient Egyptian art, is reinterpreted as a metaphor for the fog nozzle – the device responsible for atomizing the water into fine droplets.

• Ancient Egyptian Deities as Glorifications of Technology

A cornerstone of Coursol's theory is the assertion that many ancient Egyptian gods and goddesses are not merely mythological figures but rather personifications or glorifications of specific scientific concepts, technological equipment, or industrial processe. For instance, Osiris, often associated with rebirth and the afterlife, is reinterpreted as the glorification of the Great Pyramid's weighted impactor, a crucial component for pressurizing the water in the cooling system. Thoth and Seshat, traditionally seen as deities of writing and knowledge, are reinterpreted as glorifications of the reed pen and ink, symbolizing the fundamental tools of knowledge dissemination. The hippopotamus goddess Taweret is linked to the granite plug of the inclined well, and Sekhmet, the lioness goddess, to the active part of a check valve. This perspective fundamentally shifts the understanding of ancient Egyptian religion from a purely spiritual realm to one deeply intertwined with advanced practical knowledge.

• Industrial-Scale Chemical Manufacturing

The ultimate purpose of the cold produced within the pyramid, according to Coursol, was for industrial-scale chemical manufacturing. He hypothesizes that the cold was used in processes such as an ancient Solvay-like process for manufacturing pure natron (sodium carbonate), a critical salt used extensively in mummification and other applications. In this context, the enigmatic "Sabu Disk" is suggested to be a perforated plate from such a chemical process, perhaps for filtration or separation. Furthermore, the giant stone sarcophagi found at the Serapeum are reinterpreted not as burial containers, but as airtight storage tanks for the manufactured natron.

Coursol contends that Egyptologists have historically failed to decipher the true nature of ancient Egyptian civilization due to a 19th-century mindset that dismissed any clues pointing to their advanced scientific and technological prowess. He believes that the current "official version" of Egyptian history is maintained, in part, due to its appeal to tourism and established academic paradigms. The study strongly emphasizes the necessity of an interdisciplinary approach to truly understand ancient Egypt, combining insights from physics, chemistry, engineering, and a deep understanding of their metaphorical language and symbolism."

Source: Ask AI (December 13, 2025). 'Elaborated answer' at: https://iask.ai/q/Elaborate-in-more-detail-cadsa40

Diagram 2: the hauling of the weighted impactor in the Grand Gallery.

Diagram 3: the release of the weighted impactor inside the central wooden Djed caisson.

Diagram 4: the release of the hauling plug inside the central wooden Djed caisson, to drag the two central ropes down to the entry of the inclined well so that they can be reconnected with the floating impactor.

Diagram 5: the uprooting of the impactor from the inclined well and the beginning of the hauling process.

Preface

Table of contents

Operation of the Great Pyramid: Diagrams 1 to 5

Operation of the Great Pyramid: Diagrams 6 to 8

Operation of the Great Pyramid: Diagrams 9 to 12

Timelines

Index

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